{"title":"Camera Lenses \u0026 Adapters","description":null,"products":[{"product_id":"zwo-1-3-2-1mm-150-lens","title":"ZWO 2.1mm 150° All-Sky Lens - For 1\/3\" Sensors","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.1mm Focal Length\u003c\/li\u003e\n\u003cli\u003e150° Field of View\u003c\/li\u003e\n\u003cli\u003eOptimized for 1\/3\" Format Sensors\u003c\/li\u003e\n\u003cli\u003eFunctions as an All-Sky Camera Lens\u003c\/li\u003e\n\u003cli\u003eStandard CS-Mount Thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eZWO 2.1mm 150° All-Sky Lens - For 1\/3\" Sensors\u003c\/h2\u003e\n\u003cp\u003eThe ZWO 2.1mm CS-mount lens transforms your planetary camera into a dedicated all-sky monitoring tool, capturing a vast 150° field of view in a single frame. This lens is specifically designed for ZWO cameras equipped with a 1\/3\" sensor, such as the ASI120 or ASI224MC, providing edge-to-edge coverage for meteor detection and weather surveillance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCapture a 150° Horizon-to-Horizon View\u003c\/h3\u003e\n\u003cp\u003eWith a short 2.1mm focal length, this lens achieves an extremely wide 150° field of view. This allows you to capture the majority of the night sky at once, making it the ideal choice for recording meteor showers, tracking satellite passes, or monitoring cloud cover throughout the night without a tracking mount. The sky becomes a dynamic canvas rather than a static target.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for 1\/3\" ZWO Guide \u0026amp; Planetary Cameras\u003c\/h3\u003e\n\u003cp\u003eThis lens is engineered to perfectly match the image circle of 1\/3\" format sensors. This ensures the entire sensor is illuminated without significant vignetting or wasted field, a common issue when pairing lenses with mismatched sensors. It is a direct-fit solution for popular models like the ZWO ASI120MM-S, ASI120MC-S, and ASI224MC, turning them into powerful scientific and surveillance instruments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCS-Mount Standard and Adapter Requirements\u003c\/h3\u003e\n\u003cp\u003eThe lens uses a standard CS-mount thread for direct connection to compatible camera bodies. Note that a C\/CS mount adapter is not included with this lens. To achieve proper focus, you will need the CS-mount adapter that was originally supplied with your ZWO camera, or purchase one separately. A CS-mount lens cannot reach focus on a camera with C-mount threads, since an adapter ring can only add distance, not remove it.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fit:\u003c\/strong\u003e Screws directly into the CS-mount threads found on many ZWO cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for C-Mount Cameras:\u003c\/strong\u003e A CS-mount lens will not reach focus on a camera body with C-mount threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocus Mechanism:\u003c\/strong\u003e Manual focus and aperture control allow you to set and lock the lens for consistent nightly operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of events can I capture with the ZWO 2.1mm 150° lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ultra-wide 150° field of view is ideal for capturing large-scale celestial phenomena. You can record entire meteor showers like the Perseids or Geminids, track the paths of bright fireballs, monitor for transient events like aurora, or simply create time-lapses of the Milky Way rising and setting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich ZWO cameras work best with this 2.1mm lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is designed for cameras with a \u003cstrong\u003e1\/3\" sensor\u003c\/strong\u003e. The most common and recommended pairings are the ZWO ASI120 series (both monochrome and color) and the ASI224MC. Using it on a larger sensor will result in heavy vignetting and an incomplete image circle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the ZWO 2.1mm all-sky lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFocus is achieved manually by turning the lens barrel. For astronomical use, it's best to focus at night on a bright star. Once sharp focus is achieved across the field, you can use the locking screw on the lens to fix its position for long-term, unattended operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a tracking mount to use the ZWO 2.1mm lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, a tracking mount is not necessary. In fact, this lens is designed for static use on a fixed tripod. The 150° field of view is so wide that stars will take hours to drift across the frame, which is perfect for creating all-sky time-lapses and monitoring the sky from a fixed position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need any filters with the ZWO 2.1mm lens for meteor observation?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most all-sky applications like meteor showers (e.g., the Orionids), you do not need any filters. You want to capture as much light as possible. If you are in a light-polluted area, a simple IR-cut filter might help improve contrast slightly, especially with a color camera like the ASI224MC, but it is not a requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat adapter do I need to connect the ZWO 2.1mm lens to my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a CS-mount lens. It will screw directly into a camera that has female CS-mount threads. It will not reach focus on a camera with C-mount threads, because a C-to-CS adapter ring only adds 5mm of spacing and cannot shorten the flange distance. Most ZWO cameras that this lens is designed for, like the ASI120, come with the necessary adapters, but the lens itself does not include one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-LENS-2.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View\u003c\/td\u003e\n\u003ctd\u003e150°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesigned Sensor Size\u003c\/td\u003e\n\u003ctd\u003e1\/3\" Format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eCS-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e150º CS Lens for ASI 1\/3\" Sensors\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967384219933,"sku":"ZWO-LENS-2.1","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-1-3-inch-2-1mm-150-degree-lens-1__84146.1596910045.1280.1280.jpg?v=1684341533"},{"product_id":"zwo-2-5mm-170-lens","title":"ZWO 2.5mm 170° All-Sky Lens - For 1\/2\" Sensors","description":"\u003cul class=\"DAV-feature-list\"\u003e\n  \u003cli\u003e2.5mm Focal Length\u003c\/li\u003e\n  \u003cli\u003e170° All-Sky Field of View\u003c\/li\u003e\n  \u003cli\u003eDesigned for 1\/2\" Format Sensors\u003c\/li\u003e\n  \u003cli\u003eCS-Mount Thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n  \u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n  \u003cli\u003eFAQ\u003c\/li\u003e\n  \u003cli\u003eSpecifications\u003c\/li\u003e\n  \u003cli\u003eIn the Box\u003c\/li\u003e\n  \u003cli\u003eDownloads\u003c\/li\u003e\n  \u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n  \u003cli class=\"active\"\u003e\n    \u003cdiv\u003e\n      \u003cdiv class=\"DAV-bg-light\"\u003e\n        \u003cdiv class=\"DAV-section-center\"\u003e\n          \u003ch2\u003eZWO 2.5mm 170° All-Sky Lens - For 1\/2\" Sensors\u003c\/h2\u003e\n          \u003cp\u003eThe ZWO 2.5mm 170° All-Sky CS Lens transforms your astronomy camera into a horizon-to-horizon sentinel, capturing a massive 170-degree field of view in a single frame. This 2.5mm focal length lens is engineered specifically for cameras with a 1\/2\" sensor, such as the ZWO ASI178 and ASI185 series, to monitor meteor showers, track atmospheric phenomena, or conduct sky surveillance.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"DAV-bg-light\"\u003e\n        \u003cdiv class=\"DAV-section\"\u003e\n          \u003ch3\u003eAchieve a 170° All-Sky Perspective\u003c\/h3\u003e\n          \u003cp\u003eThe primary function of this 2.5mm lens is to deliver an immense 170° field of view. This expansive coverage allows you to capture the entire visible sky dome at once, making it the ideal tool for time-lapses of the Milky Way's transit, recording meteor showers like the Perseids or Geminids, or monitoring for transient events like fireballs and satellite flares.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"DAV-bg-light\"\u003e\n        \u003cdiv class=\"DAV-section\"\u003e\n          \u003ch3\u003eOptimized for 1\/2\" Format Sensors\u003c\/h3\u003e\n          \u003cp\u003eThis lens is designed to match the imaging circle of 1\/2\" format sensors. When paired with cameras like the ZWO ASI178MM, ASI178MC, or ASI185MC, it produces a complete, circular all-sky image with minimal vignetting at the sensor's edges. This ensures that the data you collect from horizon to horizon is usable and consistent.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e\n              \u003cstrong\u003eDirect Compatibility:\u003c\/strong\u003e Threads directly onto the CS-mount of compatible ZWO cameras.\n            \u003c\/li\u003e\n            \u003cli\u003e\n              \u003cstrong\u003eSensor Match:\u003c\/strong\u003e The 2.5mm focal length is calculated to project the full 170° field onto the smaller sensor format, preventing wasted field of view or excessive black borders.\n            \u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"DAV-bg-light\"\u003e\n        \u003cdiv class=\"DAV-section\"\u003e\n          \u003ch3\u003eCS-Mount Connection and Considerations\u003c\/h3\u003e\n          \u003cp\u003eThe lens features a standard CS-mount thread for direct attachment to many planetary and guide cameras. However, it's critical to note that a CS-mount lens will not reach focus on a camera with a C-mount thread. The CS flange distance is shorter than the C-mount distance, and an adapter ring can only add spacing, not remove it. If your ZWO camera needs a CS-mount adapter, it is not included with the lens.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras are compatible with the ZWO 2.5mm All-Sky Lens?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eThis 2.5mm lens is specifically designed for cameras with a \u003cstrong\u003e1\/2\" sensor format\u003c\/strong\u003e and a CS-mount. It is an excellent match for models like the ZWO ASI178MM, ASI178MC, and ASI185MC. It will also work with the ASI120 series.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need any adapters to use the ZWO 2.5mm lens?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eIt depends on your camera's mount. The lens has a \u003cstrong\u003eCS-mount thread\u003c\/strong\u003e. If your camera (like the ASI178) has a native CS-mount, it will attach directly. If your camera uses a C-mount, this lens will not reach focus, because a C-to-CS adapter ring only adds spacing. No adapter is included.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO 2.5mm lens good for capturing the Geminids meteor shower?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eYes, absolutely. Its 170° field of view makes it perfect for meteor showers. You can point the camera straight up and capture meteors appearing anywhere in the sky without having to aim, making it an ideal setup for automated meteor detection with dedicated meteor detection software.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 2.5mm lens work with a larger sensor, like an APS-C camera?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eNo, this lens is not recommended for sensors larger than 1\/2\". The image circle it projects is too small for larger sensors and will result in severe vignetting, showing only a small illuminated circle in the center of a large black frame.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the ZWO 170° All-Sky Lens?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eThis lens does not have a standard filter thread on the front or rear element. It is designed for wide-field, unfiltered imaging of the night sky. Attempting to place a filter in the optical path would require a custom solution.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n      \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the ZWO 2.5mm lens?\u003c\/h3\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion-A\"\u003e\n      \u003cp\u003eThe lens has a manual focus ring. You will need to adjust it by hand to achieve sharp stars. It's best to perform this at night, viewing a live feed from the camera on a laptop screen and adjusting the focus until stars appear as tight points of light.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003ctable class=\"DAV-specifications\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSKU\u003c\/td\u003e\n          \u003ctd\u003eZWO-LENS-2.5\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eFocal Length\u003c\/td\u003e\n          \u003ctd\u003e2.5mm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eField of View\u003c\/td\u003e\n          \u003ctd\u003e170°\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMount\u003c\/td\u003e\n          \u003ctd\u003eCS-Mount\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eRecommended Sensor Format\u003c\/td\u003e\n          \u003ctd\u003e1\/2\"\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eWarranty\u003c\/td\u003e\n          \u003ctd\u003e2 Years\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cul class=\"DAV-grid\"\u003e\n      \u003cli class=\"DAV-grid-item\"\u003e\n        \u003cdiv\u003e\n          \u003cp class=\"DAV-item-title\"\u003e170º 2.5mm CS Lens\u003c\/p\u003e\n          \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n    \u003cul class=\"DAV-grid\"\u003e\n      \u003cli class=\"DAV-grid-item\"\u003e\n        \u003ca href=\"https:\/\/www.zwoastro.com\/software\/\" target=\"_blank\"\u003e\n          \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\n            \u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\n          \u003c\/svg\u003e\n          \u003cdiv\u003e\n            \u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/a\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Limited Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967385956637,"sku":"ZWO-LENS-2-5","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-2-5mm-170-degree-lens-1__46794.1596910046.1280.1280.jpg?v=1684341752"},{"product_id":"zwo-cs-lens-2-8mm-12mm-f1-4","title":"ZWO CS Lens 2.8mm-12mm F1.4","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.8mm to 12mm Zoom Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/1.4 Aperture\u003c\/li\u003e\n\u003cli\u003e~100° Wide Field of View\u003c\/li\u003e\n\u003cli\u003eDesigned for 1\/3\" Format Sensors\u003c\/li\u003e\n\u003cli\u003eStandard CS-Mount Thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eZWO 2.8mm - 12mm f\/1.4 CS Lens\u003c\/h2\u003e\n\u003cp\u003eThe ZWO 2.8mm - 12mm f\/1.4 CS Lens transforms your small-format planetary camera into a dedicated all-sky instrument. Its variable 2.8mm to 12mm focal length provides a field of view up to approximately 100 degrees, while the fast f\/1.4 aperture gathers enough light for capturing transient events like meteors. This lens is specifically engineered for cameras with 1\/3\" sensors, such as the ZWO ASI120 series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2.8mm to 12mm Zoom for Framing the Sky\u003c\/h3\u003e\n\u003cp\u003eThe key to this lens is its flexible 2.8mm to 12mm zoom range. At 2.8mm, you can capture an immense swath of the sky, perfect for monitoring meteor showers or imaging the entire Milky Way band. Zooming in towards 12mm allows you to frame specific large constellations or regions of interest without swapping equipment, giving you compositional control directly at the lens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe f\/1.4 Advantage for Faint, Fast Events\u003c\/h3\u003e\n\u003cp\u003eAn f\/1.4 focal ratio is exceptionally fast, maximizing light collection in short exposures. This is critical for capturing the fleeting streaks of meteors, which last only a fraction of a second. The wide aperture allows you to use higher frame rates and lower gain on your camera, resulting in cleaner, less noisy video captures of atmospheric phenomena or auroral displays.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCS-Mount Integration for 1\/3\" Sensors\u003c\/h3\u003e\n\u003cp\u003eThis lens uses the standard CS-mount, designed to match the small chip size of 1\/3\" format guide and planetary cameras. This ensures the entire sensor is illuminated without vignetting and that the resolution is matched to the camera's capabilities. Note that to connect this lens to a standard ZWO camera with T2 threads, you will need a separate T2-CS adapter.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Compatibility:\u003c\/strong\u003e Optimally pairs with cameras like the ZWO ASI120MC\/MM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapter Required:\u003c\/strong\u003e A T2-CS or M42-CS adapter is necessary for connecting to most ZWO cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse Case Limitation:\u003c\/strong\u003e The small image circle is not intended for larger format deep-sky cameras, which would show severe vignetting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras work best with the ZWO 2.8-12mm CS Lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is designed for cameras with a \u003cstrong\u003e1\/3\" sensor format\u003c\/strong\u003e. The classic pairing is with the ZWO ASI120 series cameras. Using it with a camera that has a larger sensor will result in a small image circle in the center of the frame and heavy vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an adapter to attach this ZWO lens to my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Most ZWO cameras feature a female T2 (M42x0.75) thread on the front. To attach this CS-mount lens, you will need a \u003cstrong\u003eT2-CS adapter\u003c\/strong\u003e, which is sold separately. This adapter provides the correct threading and spacing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the ZWO 2.8-12mm lens to capture the Perseid meteor shower?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor the Perseids, set the lens to its widest focal length (\u003cstrong\u003e2.8mm\u003c\/strong\u003e) to maximize the sky coverage. Point your camera towards a dark part of the sky about 45 degrees away from the radiant in Perseus. The fast \u003cstrong\u003ef\/1.4 aperture\u003c\/strong\u003e will allow you to capture even faint meteors using short video exposures in a program like SharpCap or FireCapture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ZWO 2.8-12mm lens good for imaging planets or galaxies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this lens is not suitable for planetary or deep-sky imaging. Its extremely short focal length (\u003cstrong\u003e2.8mm-12mm\u003c\/strong\u003e) is designed for ultra-wide-angle views of the sky. For planets, you need the long focal length of a telescope, and for most galaxies, you need a much longer focal length instrument to resolve any detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the \"fisheye\" effect mean for this ZWO lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt its widest 2.8mm setting, the lens will exhibit significant barrel distortion, often called a \"fisheye\" effect. This means straight lines (like building edges) will appear curved, and constellations near the edge of the frame will look stretched. This is a normal optical characteristic of very wide-angle lenses and is necessary to achieve the ~100-degree field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use filters with the ZWO 2.8-12mm CS lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens does not have a standard front filter thread like a DSLR lens. It is designed for unfiltered, wide-field imaging of the night sky, such as for meteor showers or capturing the Milky Way in true color with a one-shot-color camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eZWO-LENS-2.8-12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2.8mm - 12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003ef\/1.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003eCS-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Sensor Format\u003c\/td\u003e\n\u003ctd\u003e1\/3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View (approx.)\u003c\/td\u003e\n\u003ctd\u003e~100°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2.8mm - 12mm f\/1.4 CS Lens\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/zwo-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44967433240861,"sku":"ZWO-LENS-2.8-12","price":53.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ZWO-CS-Lens-2-8mm-12mm-F1-4-1__29815.1596910053.1280.1280.jpg?v=1684341838"},{"product_id":"askar-fma180-pro-180mm-f-4-5-apo-full-frame-lens","title":"Askar FMA180 Pro 180mm f\/4.5 APO Full Frame Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e40mm Aperture Sextuplet APO Lens\u003c\/li\u003e\n\u003cli\u003e180mm Focal Length at a Fast f\/4.5\u003c\/li\u003e\n\u003cli\u003e44mm Image Circle for Full-Frame Sensors\u003c\/li\u003e\n\u003cli\u003eStandard 55mm Back Focus with M48x0.75 Threads\u003c\/li\u003e\n\u003cli\u003eIntegrated 360° Rotator and Internal Focuser\u003c\/li\u003e\n\u003cli\u003eLightweight 0.8kg Design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar FMA180 Pro 180mm f\/4.5 APO Full Frame Lens\u003c\/h2\u003e\n\u003cp\u003eThe Askar FMA180 Pro lens integrates a 40mm sextuplet APO optical system into a compact astrograph, delivering a fast f\/4.5 focal ratio and a 180mm focal length for wide-field imaging. Its air-spaced design incorporates two ED glass elements to produce sharp, color-corrected stars across a 44mm image circle, fully illuminating full-frame sensors. Weighing just 0.8kg and measuring 167.5mm in length, the FMA180 Pro provides a standard 55mm back focus for seamless integration into your existing imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSextuplet f\/4.5 APO Optics: A 44mm Full-Frame Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe FMA180 Pro's optical core is a six-element apochromatic design with two extra-low dispersion (ED) elements, engineered specifically for astrophotography. This configuration provides excellent chromatic aberration control, ensuring pinpoint stars without color fringing. The fast f\/4.5 focal ratio allows you to capture significant signal in shorter sub-exposures, reducing demands on your tracking mount.\u003c\/p\u003e\n\u003cp\u003eWith a 44mm image circle, this lens is built to serve modern full-frame CMOS and DSLR cameras. You can capture vast targets like the Andromeda Galaxy (M31) or the Rho Ophiuchi cloud complex without the vignetting or field curvature issues that plague lenses not designed for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePro Astrograph Design: Internal Focusing and a 360° Rotator\u003c\/h3\u003e\n\u003cp\u003eThe \"Pro\" designation signifies key mechanical upgrades for imagers. The internal focusing mechanism moves lens elements internally, eliminating drawtube sag and tilt that can occur with external focusers, especially when supporting heavy filter wheels and cameras. This ensures a rigid, stable optical train throughout your imaging session.\u003c\/p\u003e\n\u003cp\u003eAn integrated 360° rotator allows for precise framing of your target without rotating your entire camera and cable assembly. The OTA also includes a multi-functional finder base and a Vixen-style dovetail plate, allowing it to be used as a primary imaging scope, a high-end guide scope, or a compact visual instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFMA180 Pro vs. FMA180: Key Upgrades for Imaging\u003c\/h3\u003e\n\u003cp\u003eWhile sharing the same core optics as its predecessor, the FMA180 Pro introduces several critical enhancements for astrophotography. These upgrades address the practical needs of remote and automated imaging.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Focuser:\u003c\/strong\u003e The Pro model's internal focusing design provides superior stability and focus retention compared to the external focuser of the standard FMA180. This is a significant advantage for automated focusing routines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Rotator:\u003c\/strong\u003e The addition of a dedicated rotator makes framing targets dramatically easier, a feature absent on the original model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinder Base:\u003c\/strong\u003e An integrated finder-style mounting base adds versatility for attaching guide scopes or other accessories directly to the OTA.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Askar FMA180 Pro suitable for full-frame cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Askar FMA180 Pro is designed with a corrected \u003cstrong\u003e44mm image circle\u003c\/strong\u003e. This is large enough to fully illuminate the sensors of full-frame cameras (typically 43.3mm diagonal) without significant light fall-off or distortion at the corners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the FMA180 Pro perform on the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e180mm focal length\u003c\/strong\u003e is an excellent match for very large emission nebulae. Paired with a full-frame camera, the FMA180 Pro can capture the entire North American Nebula (NGC 7000) and the adjacent Pelican Nebula (IC 5070) in a single frame with high resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the internal focusing on the FMA180 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInternal focusing provides superior mechanical stability. Because no external drawtube moves, it prevents potential sag or tilt, which is critical for maintaining a flat field with heavy cameras and filter wheels. It also ensures the overall length of the instrument remains fixed at \u003cstrong\u003e167.5mm\u003c\/strong\u003e, simplifying cable management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar FMA180 Pro as a guide scope on a larger SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Its light weight of just \u003cstrong\u003e0.8kg\u003c\/strong\u003e and its Vixen-style dovetail, which can be attached to a larger scope's mounting rings or a finder shoe, make it an exceptional high-quality guide scope. The apochromatic optics ensure tight, round guide stars for precise tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to connect my astronomy camera to the FMA180 Pro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FMA180 Pro terminates in standard \u003cstrong\u003eM48x0.75 male threads\u003c\/strong\u003e. It is designed for a standard \u003cstrong\u003e55mm back focus\u003c\/strong\u003e, which is the same spacing required by most DSLRs with a T-ring and dedicated astronomy cameras when used with common filter wheels or off-axis guiders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar FMA180 Pro a good choice for planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this lens is a wide-field specialist. Its short \u003cstrong\u003e180mm focal length\u003c\/strong\u003e is designed to capture large swaths of the sky. For planetary imaging of targets like Jupiter or Saturn, you need a telescope with a much longer focal length (typically 2000mm or more) to achieve the necessary magnification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture Size\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Lens\u003c\/td\u003e\n\u003ctd\u003eSextuplet air-spaced APO with two ED elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Thread\u003c\/td\u003e\n\u003ctd\u003eM48×0.75 (with internal 2\" filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Length\u003c\/td\u003e\n\u003ctd\u003e167.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e0.8kg (Including tube ring \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFMA180 Pro OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInstruction Manual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44967778910493,"sku":"ASK-FMA180","price":615.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-FMA180-Pro.jpg?v=1720552327"},{"product_id":"askar-fma135-135mm-f-4-5-apo-lens","title":"Askar FMA135 135mm f\/4.5 APO Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e135mm Focal Length\u003c\/li\u003e\n\u003cli\u003ef\/4.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e30mm Aperture\u003c\/li\u003e\n\u003cli\u003eSextuplet APO Optical Design\u003c\/li\u003e\n\u003cli\u003e280g Total Weight\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAskar FMA135 135mm f\/4.5 APO Lens\u003c\/h2\u003e\n\u003cp\u003eThe Askar FMA135 combines a 30mm aperture with a 135mm focal length into a fast f\/4.5 optical system designed specifically for wide-field astrophotography. Its advanced sextuplet air-spaced APO objective, which includes one ED glass element, is housed in a compact 113mm body that weighs only 280g. The design provides a native M42×0.75 thread for secure camera attachment and includes a 1.25\" adapter for use as a visual finder or guidescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSextuplet f\/4.5 APO Optics: 6-Element Flat-Field Design\u003c\/h3\u003e\n\u003cp\u003eUnlike standard telephoto lenses or simple refractors, the FMA135 is a dedicated astrograph with an integrated 6-element optical design. This consists of a three-element (triplet) objective lens and a three-element flattener, working in concert to deliver sharp, color-pure stars across a wide, flat field suitable for modern sensors.\u003c\/p\u003e\n\u003cp\u003eThe inclusion of one ED (Extra-low Dispersion) glass element in the objective significantly suppresses chromatic aberration, eliminating the distracting blue or purple halos around bright stars. The native f\/4.5 focal ratio allows you to capture faint details in large nebulae and star fields with significantly shorter exposure times compared to slower optical systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e135mm Wide-Field Astrophotography: From Nebulae to Comets\u003c\/h3\u003e\n\u003cp\u003eWith its 135mm focal length, the FMA135 is perfectly suited for capturing some of the sky's largest and most impressive targets. Entire constellations, the vast dust lanes of the Milky Way, the full expanse of the Andromeda Galaxy (M31), or the North American Nebula (NGC 7000) can be framed with room to spare, especially on an APS-C sensor.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Field Imaging:\u003c\/strong\u003e The integrated flattener ensures that stars remain tight, round points from the center to the corners of your image, a critical feature many standard camera lenses lack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure Connections:\u003c\/strong\u003e A rear M42×0.75 male thread provides a rigid, threaded connection to your astronomy camera or DSLR T-ring, preventing tilt or flexure during long exposures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Ready:\u003c\/strong\u003e The front of the lens features a standard 1.25\" filter thread, allowing you to use light pollution or nebula filters to enhance your images directly at the objective.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 280g Multi-Role Instrument: Astrograph, Guider, and Telephoto Lens\u003c\/h3\u003e\n\u003cp\u003eWeighing only 280g with its mounting ring, the FMA135 is an exceptionally versatile instrument that excels in multiple roles. Its minimal weight makes it an ideal imaging optic for small, portable star trackers where every gram counts.\u003c\/p\u003e\n\u003cp\u003eUsing the included 1.25\" adapter, the FMA135 transforms into a high-quality guidescope with a 135mm focal length, perfect for guiding main telescopes with focal lengths up to 1000mm. It can also serve as a premium straight-through finderscope with a low-power 1.25\" eyepiece. For terrestrial photographers, it functions as a compact, manual-focus 135mm telephoto lens with outstanding optical correction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFMA135 vs. Camera Lenses: An Astro-Specific Advantage\u003c\/h3\u003e\n\u003cp\u003eWhile a high-end 135mm camera lens might offer a faster f-ratio on paper, the FMA135 holds a distinct advantage for astrophotography. Camera lenses are often designed for daytime subjects and must be stopped down to f\/2.8 or f\/4 to correct for coma and astigmatism that distort stars at the edge of the frame, negating their speed advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompetitor's Edge:\u003c\/strong\u003e Premium 135mm camera lenses can be faster, some reaching f\/1.8 or f\/2.0, allowing for more light gathering in a single exposure if optical compromises are acceptable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAskar's Advantage:\u003c\/strong\u003e The FMA135 is optimized for a flat, color-corrected field at its native f\/4.5. It delivers superior star shapes to the edge of the frame without being stopped down and features astronomy-specific mechanics like a locking helical focuser, M42 camera threads, and integrated filter compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects can I image with the Askar FMA135 on a star tracker?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eAskar FMA135\u003c\/strong\u003e is ideal for large deep-sky objects and constellations. Its 135mm focal length allows you to capture vast targets like the Andromeda Galaxy (M31), the Orion Nebula (M42) region including the Horsehead Nebula, the North American Nebula (NGC 7000), and the Rho Ophiuchi cloud complex in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Askar FMA135 as a guidescope for my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With a focal length of 135mm, the \u003cstrong\u003eAskar FMA135\u003c\/strong\u003e is an excellent guidescope for telescopes with focal lengths up to and beyond 1000mm, including 8\" Schmidt-Cassegrains. Simply attach your 1.25\" guide camera using the included adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat camera connection does the Askar FMA135 have?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eAskar FMA135\u003c\/strong\u003e has a standard \u003cstrong\u003eM42×0.75 male thread\u003c\/strong\u003e on the rear. This allows direct, secure connection to most dedicated astronomy cameras and to DSLR or mirrorless cameras via a standard, camera-specific M42 T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Askar FMA135 a true apochromatic (APO) telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The objective is a triplet design that includes one element of \u003cstrong\u003eED (Extra-low Dispersion) glass\u003c\/strong\u003e to provide excellent chromatic aberration correction. The complete optical system is a sextuplet (6-element) design, engineered to deliver color-pure, high-contrast images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the Askar FMA135?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFocusing is achieved with a smooth, precise helical focuser integrated into the objective lens assembly. You rotate the forward part of the lens to achieve sharp focus. This mechanism is more robust and stable than typical camera lens focusing systems for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" filters with the FMA135?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the front of the \u003cstrong\u003eAskar FMA135\u003c\/strong\u003e lens barrel is equipped with a female thread designed to accept standard 1.25\" astronomy filters. This allows you to easily add light pollution, narrowband, or color filters to your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e135mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Design\u003c\/td\u003e\n\u003ctd\u003eSextuplet Air-Spaced APO (with one ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Length\u003c\/td\u003e\n\u003ctd\u003e113mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Weight\u003c\/td\u003e\n\u003ctd\u003e280g (Including tube ring \u0026amp; dovetail plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImaging Connection\u003c\/td\u003e\n\u003ctd\u003eM42×0.75 Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisual\/Guiding Connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFMA135 Lens Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Tube Ring\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25\" Visual Adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting Screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 5\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInstruction Manual\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.sharpstar-optics.com\/download_list_1\/7.html\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Drivers\/Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/askar-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eAskar 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":46790462996765,"sku":"ASK-FMA135","price":461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Askar-FMA135.jpg?v=1696520355"},{"product_id":"svbony-sv555-54mm-f-4-5-petzval-apo-astrograph-lens","title":"SVBONY SV555 54mm f\/4.5 Petzval APO Astrograph Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e54mm Aperture \/ 243mm Focal Length (f\/4.5)\u003c\/li\u003e\n\u003cli\u003e5-Element Petzval APO Optical Design\u003c\/li\u003e\n\u003cli\u003e44mm Full-Frame Image Circle\u003c\/li\u003e\n\u003cli\u003eVariable f\/4.5 to f\/22 Aperture Ring\u003c\/li\u003e\n\u003cli\u003eIncludes EAF Mounting Kit and 360° Rotator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSvbony SV555 54mm F4.5 Petzval APO Astrograph Lens\u003c\/h2\u003e\n\u003cp\u003eThe Svbony SV555 combines a 5-element Petzval optical system with the functionality of a professional telephoto lens, delivering a flat 44mm image circle for full-frame sensors. Its 54mm aperture and 243mm focal length produce a fast f\/4.5 focal ratio, while a unique variable aperture control allows you to stop down to f\/22 for enhanced control over star shapes and depth of field. This astrograph arrives ready for automation, including a mounting kit for popular electronic focusers right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e5-Element Petzval Optics: A 44mm Flat-Field Image Circle\u003c\/h3\u003e\n\u003cp\u003eThe SV555's core is a 5-element, 3-group Petzval objective that acts as its own field flattener, ensuring sharp, point-like stars across a full-frame 44mm image circle. This apochromatic (APO) design virtually eliminates chromatic aberration, rendering vivid, high-contrast images without color fringing. At a 243mm focal length, you can capture vast swaths of the Milky Way or frame large targets like the Andromeda Galaxy (M31) and the North American Nebula (NGC 7000) in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ef\/4.5 to f\/22 Aperture Control: Unprecedented Imaging Flexibility\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed-aperture astrographs, the SV555 features a manual aperture ring, adjustable from a wide-open f\/4.5 to a narrow f\/22. Shooting at the native f\/4.5 maximizes light gathering for faint deep-sky objects. Stopping down slightly can tighten star performance at the extreme edges of the field or increase contrast for lunar imaging, giving you a level of optical control typically reserved for camera lenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Imaging Train: 360° Rotator and Included EAF Mount\u003c\/h3\u003e\n\u003cp\u003eThe SV555 is engineered for a seamless imaging experience. It includes a dedicated mounting kit for popular EAF systems, a lockable 360° camera angle adjuster for precise framing, and a helical focuser for fine adjustments. A built-in 2\" filter holder sits within the optical train, allowing easy integration of light pollution or narrowband filters without altering your back focus. The 184mm Vixen-style dovetail plate provides a secure connection to your mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSvbony SV555 vs. William Optics RedCat 51: Aperture and Control\u003c\/h3\u003e\n\u003cp\u003eThe primary competitor in this category is the William Optics RedCat 51, a highly regarded Petzval astrograph. While both deliver a flat, full-frame field, the SV555 presents key differences.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture and Speed:\u003c\/strong\u003e The SV555 offers a slightly larger 54mm aperture and a faster f\/4.5 focal ratio compared to the RedCat's 51mm and f\/4.9. This translates to more light-gathering capability and shorter exposure times for the same target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture Control:\u003c\/strong\u003e The SV555's defining feature is its variable f\/4.5-f\/22 aperture, offering creative control over star sharpness and depth of field. The RedCat 51 has a fixed f\/4.9 aperture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Svbony includes an EAF mounting kit in the box, a component that is typically an additional purchase for other astrographs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the Svbony SV555's Petzval design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e5-element Petzval design\u003c\/strong\u003e incorporates corrective optics directly into the main lens assembly. This means the Svbony SV555 produces a flat, corrected image field across its entire 44mm image circle without requiring a separate, external field flattener, simplifying your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the variable aperture (f\/4.5-f\/22) on the SV555 benefit astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe variable aperture gives you enhanced optical control. While the native \u003cstrong\u003ef\/4.5\u003c\/strong\u003e setting is best for capturing faint deep-sky objects, stopping down to f\/5.6 or f\/8 can slightly improve star shapes at the very edge of the frame or increase contrast on bright objects like the Moon. It also provides flexibility for terrestrial and daytime photography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Svbony SV555 with my full-frame camera like a Sony A7 or Canon R5?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Svbony SV555 is designed with a \u003cstrong\u003e44mm image circle\u003c\/strong\u003e, which fully illuminates the sensors of full-frame DSLR and mirrorless cameras. The back of the lens features a standard M48x0.75 male thread, allowing you to connect your camera with a brand-specific M48 T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to attach an electronic focuser (EAF) to the SV555?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNothing extra. The Svbony SV555 \u003cstrong\u003eincludes an EAF mounting kit\u003c\/strong\u003e in the box. This kit is designed to attach popular ZWO EAF models directly to the helical focuser, allowing you to achieve automated, precise focusing right away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SV555 perform on large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV555's \u003cstrong\u003e243mm focal length\u003c\/strong\u003e provides a very wide field of view, making it ideal for large celestial targets. Paired with a full-frame camera, you can easily fit the entirety of the Andromeda Galaxy (M31) or the expansive nebulosity of the North American Nebula (NGC 7000) and the Pelican Nebula (IC 5070) within a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of filters can I use with the Svbony SV555?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Svbony SV555 has two filter mounting options. It features a \u003cstrong\u003ebuilt-in 2\" filter holder\u003c\/strong\u003e located inside the optical tube for standard 2-inch threaded filters. Additionally, the front of the lens has an \u003cstrong\u003eM72 thread\u003c\/strong\u003e for attaching larger front-mounted filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Design\u003c\/td\u003e\n\u003ctd\u003ePetzval (5 Elements in 3 Groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e54mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e243mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5 - f\/22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003eΦ 44mm (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Rotator\u003c\/td\u003e\n\u003ctd\u003eLockable 360º\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eM72 (Front), Internal 2\" Holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eVixen-style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Length\u003c\/td\u003e\n\u003ctd\u003e184mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e2450g (excluding accessories)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSV555 54mm f\/4.5 OTA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEAF Mount Kit\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHandle with Vixen Finder Saddle\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDovetail Plate with M6 Holes\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCamera Angle Adjuster\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Filter Holder (Assembled)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlastic Lens Cover\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSoft Padded Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV555_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV555_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSvbony 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861222420765,"sku":"SV-F9395A","price":714.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-SV555-54mm-F4-5-Petzval-APO-Astrograph-Lens-for-CMOS-Cameras-1_a3ed004e-fffa-45ef-b871-d8d0bfddc691.jpg?v=1788884117"},{"product_id":"svbony-sv545-45mm-f-4-5-203mm-petzval-refractor-astrograph-lens","title":"SVBONY SV545 45mm f\/4.5 203mm Petzval Refractor Astrograph Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e45mm Aperture\u003c\/li\u003e\n\u003cli\u003e203mm Focal Length (f\/4.5)\u003c\/li\u003e\n\u003cli\u003e5-Element Petzval Optical Design\u003c\/li\u003e\n\u003cli\u003eNative Flat-Field Astrograph\u003c\/li\u003e\n\u003cli\u003eHelical Focuser with 360º Rotator\u003c\/li\u003e\n\u003cli\u003eM48x0.75 Camera Connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePetzval Refractor Astrograph Lens | SVBONY SV545\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV545 is a dedicated wide-field astrograph, combining a fast f\/4.5 focal ratio with a 203mm focal length in a compact 45mm aperture optical system. Its 5-element Petzval design provides a natively flat field without the need for an external corrector, delivering sharp stars across the frame with any modern astronomy camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e45mm f\/4.5 Petzval Optics: 5 Elements for a Native Flat Field\u003c\/h3\u003e\n\u003cp\u003eThe SV545's optical core is a 5-element Petzval design arranged in 3 groups, engineered to eliminate field curvature right out of the box. This means you don't need a separate field flattener to achieve pinpoint stars, simplifying your imaging train and reducing costs. With a 45mm aperture and a fast f\/4.5 focal ratio, you can capture faint, extended objects like the North American Nebula (NGC 7000) or the Andromeda Galaxy (M31) with shorter exposure times.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-Coated (FMC) Optics:\u003c\/strong\u003e All air-to-glass surfaces are coated to maximize light transmission and contrast, ensuring rich color and detail in your images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide-Field Specialist:\u003c\/strong\u003e The 203mm focal length is purpose-built for capturing large swaths of the Milky Way and large-scale nebulae, not for high-magnification planetary viewing where its 45mm aperture would be a limitation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEAF-Ready Helical Focuser with 360° Rotation\u003c\/h3\u003e\n\u003cp\u003eAchieving critical focus is managed by a robust helical focuser designed for modern astrophotography workflows. The focuser is built to be compatible with popular Electronic Auto Focusers (EAFs), allowing you to automate your focusing routine for maximum sharpness. A lockable 360° rotator is integrated into the body, letting you frame your target perfectly without rotating your camera and upsetting your cable management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAll-Metal Build: 2750g with an M48x0.75 Connection\u003c\/h3\u003e\n\u003cp\u003eThe SV545 is constructed with an all-metal body and sealed optics, providing durability for fieldwork in changing environmental conditions. At an estimated weight of 2750g, it remains portable enough for lightweight star trackers and travel mounts. The rear of the astrograph terminates in a standard M48x0.75 male thread, enabling a secure, direct connection to DSLRs (with an M48 T-ring), dedicated astronomy cameras, and filter wheels.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDovetail Plate Mount:\u003c\/strong\u003e A standard dovetail plate allows for quick and secure attachment to a wide range of equatorial mounts and trackers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimplified Imaging Train:\u003c\/strong\u003e The standard M48 connection and native flat-field design remove the need for extra adapters and correctors, creating a more rigid and reliable optical setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a field flattener or reducer for the SVBONY SV545?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The SVBONY SV545 uses a \u003cstrong\u003ePetzval optical design\u003c\/strong\u003e, which produces a natively flat imaging field without any external correctors. You can connect your camera directly and expect sharp stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I connect my camera to the SV545 astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV545 features a standard \u003cstrong\u003eM48x0.75 male thread\u003c\/strong\u003e at the back. You can connect most dedicated astronomy cameras and filter wheels directly. For a DSLR or mirrorless camera, you will need a corresponding M48 T-ring for your camera brand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV545's focuser compatible with an EAF?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the product is designed with a helical focuser that is pre-equipped for mounting an Electronic Auto Focuser (EAF). This allows for precise, automated focusing during an imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is needed for the 2750g SVBONY SV545?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith an estimated weight of 2750g, the SV545 is well-suited for portable star trackers (like a Sky-Watcher Star Adventurer) or small equatorial mounts. Its compact size and weight make it an excellent choice for a travel astrophotography setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the SV545 frame large targets like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e203mm focal length\u003c\/strong\u003e of the SVBONY SV545 is ideal for framing large deep-sky objects. When paired with a common APS-C or Micro Four Thirds sensor, it will comfortably capture the entirety of the Orion Nebula (M42), including the surrounding nebulosity and the Running Man Nebula (NGC 1977), in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SVBONY SV545 suitable for planetary imaging?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is not the ideal instrument for planets. The SV545 is a wide-field astrograph with a short 203mm focal length and small 45mm aperture. While you could see Jupiter's moons, it lacks the magnification and resolution needed to capture detail on planetary surfaces. A Schmidt-Cassegrain or Maksutov-Cassegrain would be a better choice for that purpose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Type\u003c\/td\u003e\n\u003ctd\u003ePetzval Design (5 Elements in 3 Groups)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e203mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Rotator\u003c\/td\u003e\n\u003ctd\u003eLockable 360º\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eDovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstimated Weight\u003c\/td\u003e\n\u003ctd\u003e2750g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV545_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV545_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861222519069,"sku":"SV-W9317B","price":560.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-Petzval-Refractor-Astrograph-Lens-SVBONY-SV545-1_52bd45d5-bd8a-43f0-a072-d31ac4045018.jpg?v=1788659396"},{"product_id":"svbony-sv535-f-2-8-5-element-7-group-apo-astro-camera-lens","title":"SVBONY SV535 f\/2.8 5-Element 7-Group APO Astro Camera Lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e105mm Focal Length\u003c\/li\u003e\n\u003cli\u003eFast f\/2.8 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eApochromatic (APO) 7-Element, 5-Group Optics\u003c\/li\u003e\n\u003cli\u003eHelical Focuser for Fine Adjustment\u003c\/li\u003e\n\u003cli\u003eIntegrated Vixen\/Arca-Swiss Dovetail Plate\u003c\/li\u003e\n\u003cli\u003eM42x0.75 Direct Camera Connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAPO Astro Camera Lense | SVBONY SV535\u003c\/h2\u003e\n\u003cp\u003eThe SVBONY SV535 is a dedicated 105mm f\/2.8 astrograph lens engineered specifically for wide-field imaging. Its apochromatic optical system uses a 7-element, 5-group design to deliver sharp, color-corrected stars across a full-frame sensor. Weighing an estimated 1500g, the SV535 connects directly to your astro camera via a native M42x0.75 male thread for a rigid, secure imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFast f\/2.8 APO Optics: 105mm Wide-Field Imaging\u003c\/h3\u003e\n\u003cp\u003eThe SV535's optical design is built around its fast f\/2.8 focal ratio, allowing you to gather significant signal on faint nebulae and dust structures in a fraction of the time required by slower systems. The 105mm focal length provides a vast field of view, ideal for capturing large targets like the Andromeda Galaxy (M31) or the North America Nebula (NGC 7000) in a single frame. The apochromatic, 7-element design with full multi-coatings (FMC) ensures false color is suppressed, rendering stars as sharp, natural points of light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Mounting: Helical Focuser and M42x0.75 Connection\u003c\/h3\u003e\n\u003cp\u003eUnlike standard camera lenses adapted for astronomy, the SV535 incorporates features purpose-built for astrophotography. The body includes an integrated dovetail plate compatible with both Vixen-style and Arca-Swiss saddles, eliminating the need for separate mounting rings. Focusing is achieved with a precise helical focuser, offering smooth, fine control without the image shift common in lens-based focus mechanisms. The rear of the lens terminates in a standard M42x0.75 male thread for direct, secure attachment to dedicated astronomy cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM42x0.75 Direct Connection: Bypassing Standard T-Rings\u003c\/h3\u003e\n\u003cp\u003eA critical design feature of the SV535 is its limited back focus, which necessitates a direct M42x0.75 connection to your camera. This lens is intentionally incompatible with standard DSLR or mirrorless T-rings, as they would place the camera sensor outside the focal plane. This design choice favors dedicated astronomy cameras that can achieve focus at this shorter distance, resulting in a more compact and rigid imaging train with fewer potential points of flexure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSVBONY SV535 vs. Rokinon 135mm f\/2: A Trade-off in Focal Length and Integration\u003c\/h3\u003e\n\u003cp\u003eImagers considering the SV535 often compare it to the popular Rokinon 135mm f\/2 lens. The choice depends on your specific needs and existing equipment.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRokinon 135mm f\/2 Advantage:\u003c\/strong\u003e The Rokinon is optically faster at f\/2 and provides a longer 135mm focal length, offering slightly more image scale on smaller targets. It is also a conventional camera lens, making it easily adaptable to any DSLR or mirrorless body with standard adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSVBONY SV535 Advantage:\u003c\/strong\u003e The SV535 is a dedicated astrograph. Its integrated dovetail, helical focuser, and native M42x0.75 thread are designed for astronomical use, providing a more stable and user-friendly platform on an equatorial mount without requiring additional rings or accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of targets is the SVBONY SV535 105mm lens best for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV535 excels at capturing extremely wide-field celestial views. It is ideal for large emission nebulae like the North America Nebula (NGC 7000), vast star-forming regions like the Rho Ophiuchi cloud complex, and sprawling galaxy groups such as the Virgo Cluster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the SVBONY SV535 incompatible with standard DSLR\/Mirrorless T-rings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SV535 is designed with a very short back focus distance. This means the camera sensor must be positioned much closer to the rear lens element than standard T-rings (which add significant length) allow. It is engineered for a \u003cstrong\u003edirect M42x0.75 connection\u003c\/strong\u003e to dedicated astronomy cameras that can accommodate this short distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the SVBONY SV535 frame the Andromeda Galaxy (M31) with a full-frame camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 105mm focal length, the SVBONY SV535 on a full-frame sensor provides a field of view of approximately 19.4° x 13.0°. This is more than enough to comfortably frame the entire Andromeda Galaxy (M31), which spans about 3°, including its faint outer extensions and satellite galaxies M32 and M110.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SVBONY SV535 for imaging the Rho Ophiuchi cloud complex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Rho Ophiuchi complex is a large, sprawling target that benefits greatly from the wide field of view provided by the SV535's 105mm focal length. The lens's fast f\/2.8 focal ratio is also a significant advantage for capturing the faint, colorful dust and nebulosity in this region.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to mount the SVBONY SV535 to my equatorial mount?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SVBONY SV535 has an integrated dovetail plate built into its body. This plate is compatible with both \u003cstrong\u003eVixen-style\u003c\/strong\u003e and \u003cstrong\u003eArca-Swiss\u003c\/strong\u003e saddle clamps, so it can be mounted directly to most modern equatorial mounts and trackers without needing any additional rings or hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of a helical focuser on the SVBONY SV535?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA helical focuser allows for very fine, precise focus adjustments by rotating a collar on the lens body. Unlike the focus rings on many camera lenses, it is designed to move the optics smoothly without rotation or wobble, ensuring that your target remains centered and that focus is critically sharp, which is essential for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Type\u003c\/td\u003e\n\u003ctd\u003e7-Elements in 5 Groups, Apochromatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e105mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated (FMC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Type\u003c\/td\u003e\n\u003ctd\u003eIntegrated Dovetail Plate (Vixen \u0026amp; Arca-Swiss compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEstimated Weight\u003c\/td\u003e\n\u003ctd\u003e1500g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY_SV535_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/svbony-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eSVBONY Warranty Policy\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":52861222715677,"sku":"SV-W9317A","price":336.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/SVBONY-APO-Astro-Camera-Lense-SVBONY-SV535-1_fcb16ce7-c759-4f02-9f76-73c15aeed6be.jpg?v=1788884078"},{"product_id":"player-one-2-5mm-cs-lens","title":"Player One 2.5mm CS lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.5mm Focal Length\u003c\/li\u003e\n\u003cli\u003eCS-Mount Standard\u003c\/li\u003e\n\u003cli\u003eUltra-Wide Field of View\u003c\/li\u003e\n\u003cli\u003eIdeal for All-Sky Cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003e2.5mm CS lens\u003c\/h2\u003e\n      \u003cp\u003eThis 2.5mm CS lens is designed for a single purpose: capturing an extremely wide, horizon-to-horizon field of view. The short 2.5mm focal length is ideal for all-sky cameras, meteor detection systems, and atmospheric monitoring stations where situational awareness is more critical than high-resolution detail.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eA 2.5mm Focal Length for All-Sky Imaging\u003c\/h3\u003e\n      \u003cp\u003eThe defining characteristic of this lens is its 2.5mm focal length, which produces a \"fisheye\" or near-fisheye perspective when paired with the small sensors typical of CS-mount cameras. This allows you to capture the entire visible sky in a single frame, making it a powerful tool for automated monitoring projects.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eMeteor and Fireball Networks:\u003c\/strong\u003e Capture the full path of bright meteors against a fixed star-field background for triangulation and analysis.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eObservatory Cloud Monitoring:\u003c\/strong\u003e Get an instant, 24\/7 view of sky conditions to know when it's clear enough to open the dome.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAurora and Airglow Imaging:\u003c\/strong\u003e The ultra-wide perspective is perfect for framing large-scale, dynamic atmospheric phenomena like the aurora borealis.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTrade-Offs:\u003c\/strong\u003e Be aware that a 2.5mm focal length prioritizes field of view over image scale. There will be significant geometric distortion toward the edges, and individual objects will be very small. This lens is for capturing context, not close-up details.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary application for the 2.5mm CS lens?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe primary application is \u003cstrong\u003eall-sky imaging\u003c\/strong\u003e. Its 2.5mm focal length is designed to capture the widest possible field of view, making it ideal for meteor cameras, observatory weather stations, and monitoring large-scale atmospheric events like the aurora.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera mount does the 2.5mm CS lens use?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis lens uses the \u003cstrong\u003eCS-mount standard\u003c\/strong\u003e. This is a common threaded mount found on many security, industrial, and specialized small-format astronomy cameras, particularly those used for guiding or planetary imaging that have been repurposed for all-sky work.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see distortion with the 2.5mm CS lens?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, significant geometric distortion is an inherent characteristic of such a short focal length lens. Stars and objects near the edge of the field will appear stretched. This is a normal trade-off for achieving an ultra-wide, \"fisheye\" perspective.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 2.5mm CS lens suitable for imaging planets or galaxies?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this lens is not designed for high-magnification imaging. Its purpose is to provide the widest possible field of view, which means planets and galaxies would appear as unresolved points of light. For detailed imaging of celestial objects, you need a telescope with a much longer focal length.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 2.5mm CS lens to build a meteor camera for the Perseids?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. This is an ideal use case. The 2.5mm focal length will capture a massive swath of the sky, maximizing your chances of recording meteor trails during major showers like the Perseids or Geminids without needing to aim the camera precisely.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWould this 2.5mm CS lens work for a permanent cloud monitoring station?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, it is perfectly suited for this role. Mounted in a weatherproof enclosure and connected to a small astronomy camera, the 2.5mm CS lens can provide a continuous, horizon-to-horizon view of your local sky conditions, day or night.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n    \n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913427841309,"sku":"POA-25LENS","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-2-5mm-CS-lens-1_d1dc43d2-3bb0-49a5-aaaf-81455b4f11b2.jpg?v=1789090965"},{"product_id":"player-one-2-1mm-cs-lens","title":"Player One 2.1mm CS lens","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.1mm Focal Length\u003c\/li\u003e\n\u003cli\u003eCS-Mount Interface\u003c\/li\u003e\n\u003cli\u003e190° Field of View on 1\/2\" Sensors\u003c\/li\u003e\n\u003cli\u003e150° Field of View on 1\/3\" Sensors\u003c\/li\u003e\n\u003cli\u003eAll-Sky and Wide-Field Monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003e2.1mm CS lens\u003c\/h2\u003e\n\u003cp\u003eThis 2.1mm CS-mount lens is engineered for extreme wide-angle applications, delivering a 150° field of view when attached to a camera with a 1\/3\" sensor. When paired with a larger 1\/2\" sensor, the imaging circle expands to a full 190°, capturing a hemispheric vista ideal for all-sky cameras, meteor detection, and security monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual-Sensor Field of View: 150° on 1\/3\" and 190° on 1\/2\" Sensors\u003c\/h3\u003e\n\u003cp\u003eThe lens's utility is defined by the sensor it illuminates. On a smaller 1\/3\" sensor, common in guide cameras and planetary imagers, it produces a 150° diagonal field, offering a vast sky view suitable for wide-field framing or situational awareness. Attaching the lens to a camera with a 1\/2\" sensor utilizes the full image circle, creating a 190° fisheye perspective that can see from horizon to horizon in a single frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera is the 2.1mm CS lens compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is designed for cameras that use the \u003cstrong\u003eCS-mount standard\u003c\/strong\u003e. This includes many dedicated all-sky cameras, security and surveillance cameras, and some specific astronomical guide cameras. It is not compatible with C-mount cameras without an adapter, nor will it work with DSLR or mirrorless cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the 2.1mm CS lens have two different fields of view listed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe field of view depends entirely on the size of the camera sensor you pair it with. The lens projects a circular image; a smaller sensor captures a smaller portion of that circle, while a larger sensor captures more of it.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn a 1\/3\" sensor:\u003c\/strong\u003e The field of view is 150°.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn a 1\/2\" sensor:\u003c\/strong\u003e The field of view increases to 190°.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 2.1mm CS lens to build a meteor camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. For maximum sky coverage to capture meteor showers like the Perseids or Geminids, you should pair the 2.1mm lens with a 1\/2\" sensor camera. This combination achieves the 190° field of view, ensuring you can monitor the largest possible patch of sky all night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 2.1mm CS lens suitable for use as a wide-field guider?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile technically possible, it is not recommended for precise guiding. The extremely short 2.1mm focal length results in a very low image scale (many arcseconds per pixel), making it difficult for guiding software to detect the small star movements needed for accurate corrections on a long focal length telescope. It is designed for imaging the entire sky, not for high-magnification guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this 2.1mm CS lens have adjustable focus or aperture?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLenses of this type are typically fixed-aperture and are focused by adjusting the lens's distance to the sensor by threading it in or out of the camera's CS-mount. Once focus is achieved for infinity, it is often locked in place for dedicated applications like all-sky monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 2.1mm CS lens show the entire Milky Way?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, when used with a 1\/2\" sensor to achieve the 190° field of view, this lens can easily capture the entire visible arch of the Milky Way in a single shot, from one horizon to the other. This makes it excellent for dramatic, wide-field astrophotography and time-lapses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003eCS-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View (on 1\/3\" sensor)\u003c\/td\u003e\n\u003ctd\u003e150°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField of View (on 1\/2\" sensor)\u003c\/td\u003e\n\u003ctd\u003e190°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2.1mm CS Lens\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":52913428005149,"sku":"POA-21LENS","price":31.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-2-1mm-CS-lens-1_cd9c6577-f99f-4e5a-a637-41d455761f27.jpg?v=1789090972"},{"product_id":"qhyccd-swir-lens-for-qhy990","title":"QHYCCD SWIR Lens for QHY990\/991","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEngineered for Short-Wave Infrared (SWIR) wavelengths\u003c\/li\u003e\n\u003cli\u003eOptimized for QHY990 and QHY991 SWIR cameras\u003c\/li\u003e\n\u003cli\u003eHigh-transmission coatings for the SWIR band\u003c\/li\u003e\n\u003cli\u003eDesigned for scientific and industrial imaging applications\u003c\/li\u003e\n\u003cli\u003eProvides a complete, integrated imaging solution with QHY SWIR cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSWIR Lens for QHY990\/991\u003c\/h2\u003e\n\u003cp\u003eThis SWIR Lens for QHY990\/991 is engineered to provide a high-transmission optical path specifically for the unique sensitivity range of Short-Wave Infrared sensors. It enables the full capabilities of cameras like the QHY990 and QHY991 by using specialized glass and coatings that are transparent to wavelengths where conventional optics fail, ensuring maximum signal reaches the sensor for scientific and industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized Transmission for the SWIR Spectrum\u003c\/h3\u003e\n\u003cp\u003eStandard camera lenses are designed for visible light; their glass and anti-reflection coatings absorb or reflect a significant portion of the SWIR spectrum. This lens is constructed with materials and multi-layer coatings specifically formulated to maximize throughput in the infrared, perfectly matching the operational waveband of QHY's SWIR sensors and preventing signal loss.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDesigned for the QHY990 and QHY991\u003c\/h3\u003e\n\u003cp\u003eThis is not a general-purpose lens adapted for infrared use. It is purpose-built to integrate seamlessly with the QHY990 and QHY991 cameras, ensuring both mechanical compatibility and optical alignment. This system-level design approach guarantees that the lens delivers a clean, well-corrected image to the sensor, making it a reliable tool for demanding imaging tasks like agricultural analysis, silicon wafer inspection, or counterfeit detection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need a special SWIR lens for the QHY990\/991 camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStandard optical glass used in conventional lenses is often opaque to Short-Wave Infrared (SWIR) light. This dedicated SWIR lens uses specialized glass and coatings that are highly transmissive in the infrared spectrum, ensuring that the maximum amount of light reaches your \u003cstrong\u003eQHY990 or QHY991 sensor\u003c\/strong\u003e for accurate measurements and high-contrast images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat applications benefit from using this SWIR lens with a QHY990 camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is ideal for a range of scientific and industrial applications where SWIR imaging provides unique data. Key uses include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAgricultural Analysis:\u003c\/strong\u003e Assessing crop health and moisture content.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Inspection:\u003c\/strong\u003e Seeing through silicon wafers or detecting material defects invisible to the human eye.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecurity \u0026amp; Surveillance:\u003c\/strong\u003e Imaging through haze, smoke, or fog.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArt \u0026amp; Document Analysis:\u003c\/strong\u003e Revealing underdrawings or alterations in historical artifacts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SWIR Lens for QHY990\/991 also corrected for the visible spectrum?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is optimized specifically for the SWIR band. While it may pass some visible light, its anti-reflection coatings and optical corrections are not designed for high-fidelity imaging in the visible spectrum. For best results, it should be used exclusively for its intended SWIR applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary advantage of using this lens with a QHY990 or QHY991?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is system integration. This lens is designed to work as part of a complete solution with the \u003cstrong\u003eQHY990 and QHY991 cameras\u003c\/strong\u003e, ensuring correct mechanical fit, focus, and optical performance without the need for third-party adapters or guesswork. It unlocks the full potential of the camera's SWIR sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this lens work with SWIR cameras other than the QHY990\/991?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed and optimized for the QHY990 and QHY991, it may be compatible with other SWIR cameras that share the same mechanical interface and sensor format. However, performance is only guaranteed with the specified QHY models. Users should verify compatibility before purchasing for use with other equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use standard 1.25\" or 2\" astronomy filters with this SWIR lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCompatibility with standard astronomy filters is not specified. Most astronomy filters are designed to block infrared light (IR-cut) or pass specific visible-light narrow bands, making them unsuitable for SWIR imaging. For SWIR applications, you would typically use specialized long-pass or band-pass filters designed for infrared wavelengths.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942983627037,"sku":"QHY-070005","price":553.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-SWIR-Lens-for-QHY990-991-1_fbcf5032-fd4b-4c8d-9ba7-eeb76fcb2786.jpg?v=1789614809"}],"url":"https:\/\/davidastro.com\/collections\/camera-lenses-and-adapters.oembed","provider":"David Astro","version":"1.0","type":"link"}