{"title":"Player One Camera Lenses \u0026 Adapters","description":"\u003cp\u003ePlayer One camera lenses and adapters turn a small planetary camera into an all-sky or wide-field camera. The 2.1mm and 2.5mm CS lenses give a very wide view of the sky for meteor watching, aurora monitoring and cloud checks.\u003c\/p\u003e\u003cp\u003eThe All-Sky Kits bundle a lens with what you need to mount it on a compatible Player One camera, and the CS-1.25 adapter fits CS lenses to 1.25\" camera noses.\u003c\/p\u003e","products":[{"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":"player-one-all-sky-2-1-kit","title":"Player One All-Sky Kit - 2.1mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e2.1mm Focal Length Lens\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\u003eIdeal for All-Sky 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\u003eALL-SKY 2.1 KIT\u003c\/h2\u003e\n\u003cp\u003eThe ALL-SKY 2.1 KIT features a 2.1mm focal length lens specifically designed for continuous, wide-angle monitoring of the night sky. When paired with a 1\/3\" format sensor, this kit delivers an expansive 150° field of view, capable of capturing the majority of the celestial sphere in a single, unattended frame.\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\u003eA 150° Field of View for All-Sky Monitoring\u003c\/h3\u003e\n\u003cp\u003eThis kit's primary function is to provide an extremely wide, fish-eye perspective of the sky, making it ideal for tracking transient events. The 150° field is perfectly suited for recording meteor showers, detecting fireballs, tracking satellite passes, and monitoring atmospheric phenomena like aurora or cloud cover. Its optical design is optimized for smaller 1\/3\" sensors, such as those found in the Player One Mars-M or Mars-C cameras, ensuring the entire frame is illuminated for a complete horizon-to-horizon view.\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 is the primary use for the ALL-SKY 2.1 KIT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ALL-SKY 2.1 KIT is designed for wide-field, continuous monitoring of the night sky. Its 150° field of view makes it perfect for capturing large-scale events like meteor showers, aurora, satellite transits, and changing weather patterns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with the ALL-SKY 2.1 KIT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis lens is optimized for cameras with a \u003cstrong\u003e1\/3\" sensor format\u003c\/strong\u003e. It works exceptionally well with models like the Player One Mars-C and Mars-M, providing the specified 150° field of view without significant vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow wide is the field of view with the ALL-SKY 2.1 KIT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe lens provides a field of view of approximately \u003cstrong\u003e150 degrees\u003c\/strong\u003e when used with a compatible 1\/3\" format camera. This is wide enough to capture a massive portion of the sky, from near one horizon to the other.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the ALL-SKY 2.1 KIT suitable for imaging planets like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this kit is not designed for planetary imaging. The extremely short 2.1mm focal length produces a very wide field with very low magnification. Planets like Jupiter or Saturn would appear as tiny, unresolved points of light. For planetary imaging, you need a long focal length telescope and a dedicated planetary camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the ALL-SKY 2.1 KIT to monitor for meteor showers like the Perseids?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. The 150° field of view allows you to monitor a huge area of the sky continuously, maximizing your chances of capturing bright meteors and fireballs during events like the Perseid or Geminid meteor showers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 2.1mm focal length of the ALL-SKY 2.1 KIT signify?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA very short focal length, like 2.1mm, is characteristic of a \"fish-eye\" or ultra-wide-angle lens. This is what enables the lens to capture such a vast 150° field of view. The trade-off for this immense field is a lack of magnification, which is why it's used for monitoring the entire sky rather than individual objects.\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\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":52913429020957,"sku":"POA-AS2.1KIT","price":97.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-ALL-SKY-2-1-KIT-1_f18c4b17-4910-4bb6-8c9a-4182cb7e67b3.jpg?v=1789091003"},{"product_id":"player-one-all-sky-2-5-kit","title":"Player One All-Sky Kit 2.5mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for All-Sky Monitoring\u003c\/li\u003e\n\u003cli\u003eExtremely Wide, Fish-Eye Field of View\u003c\/li\u003e\n\u003cli\u003eOptimized for select Player One CMOS sensors\u003c\/li\u003e\n\u003cli\u003eDirect C-mount or CS-mount Connection\u003c\/li\u003e\n\u003cli\u003eIdeal for Meteor Showers and Weather Tracking\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\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\u003eALL-SKY 2.5 KIT\u003c\/h2\u003e\n      \u003cp\u003eThe Player One ALL-SKY 2.5 KIT is a dedicated lens designed to capture the entire visible sky in a single frame. It is built for continuous, unattended monitoring of meteorological events, meteor showers, or large-scale auroral displays when paired with a compatible Player One camera.\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\u003eAll-Sky Monitoring with the Player One 2.5 KIT\u003c\/h3\u003e\n      \u003cp\u003eThis lens provides an extremely wide, horizon-to-horizon field of view, making it ideal for applications where situational awareness of the entire sky is critical. Instead of tracking a single object, you can record the movement of clouds, the paths of fireballs, or the shifting patterns of the aurora across the celestial sphere.\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\u003eOptimized for Player One Neptune Series Cameras\u003c\/h3\u003e\n      \u003cp\u003eThe ALL-SKY 2.5 KIT is engineered to work perfectly with Player One cameras built around specific sensor formats. It is a confirmed match for the following models, ensuring the sensor is fully illuminated to achieve the maximum possible field of view.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCompatible Cameras:\u003c\/strong\u003e Player One Neptune-M, Neptune-C, and Neptune-C II.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\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 purpose of the ALL-SKY 2.5 KIT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe ALL-SKY 2.5 KIT is designed for \u003cstrong\u003eall-sky imaging and monitoring\u003c\/strong\u003e. Its purpose is to capture a fish-eye view of the entire sky to record events like meteor showers, auroras, cloud patterns, and satellite passes without needing to point a telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich cameras are compatible with the ALL-SKY 2.5 KIT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis lens is specified to work perfectly with the \u003cstrong\u003ePlayer One Neptune-M\u003c\/strong\u003e, \u003cstrong\u003eNeptune-C\u003c\/strong\u003e, and \u003cstrong\u003eNeptune-C II\u003c\/strong\u003e cameras. It is designed for their sensor format to provide an expansive, unvignetted view.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the ALL-SKY 2.5 KIT to capture the Geminid meteor shower?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou would attach the ALL-SKY 2.5 KIT directly to a compatible camera, such as a Neptune-C II. Mount the camera in a weatherproof housing pointing straight up (to the zenith). Then, run a continuous video capture or a sequence of still images throughout the night to record any meteors that cross the field of view.\u003c\/p\u003e\n  \u003c\/div\u003e\n      \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan the ALL-SKY 2.5 KIT be used for daytime cloud monitoring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The lens is perfectly suited for daytime meteorological use. It can be used to create time-lapses of cloud formations, storm development, and other atmospheric phenomena, providing a complete view of 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\"\u003eDoes the ALL-SKY 2.5 KIT require a telescope to work?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, it is a standalone lens. It attaches directly to the C-mount or CS-mount threads on the front of a compatible astronomy camera, replacing a telescope entirely for this specific wide-field application.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of field of view can I expect with the ALL-SKY 2.5 KIT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe ALL-SKY 2.5 KIT provides an extremely wide, fish-eye perspective. It is capable of capturing the majority of the sky from horizon to horizon in a single shot, which is the defining characteristic of an \"all-sky\" lens.\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\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":52913429250333,"sku":"POA-AS2.5KIT","price":97.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-ALL-SKY-2-5-KIT-1_41a4ab55-36d7-43b8-a83e-411bca896fd2.jpg?v=1789091011"},{"product_id":"player-one-cs-1-25-adapter","title":"Player One CS-1.25 Adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects CS-mount lenses to 1.25\" cameras\u003c\/li\u003e\n\u003cli\u003eFemale Thread: CS-Mount\u003c\/li\u003e\n\u003cli\u003eMale Thread: M28.5x0.6mm (Standard 1.25\" Filter Thread)\u003c\/li\u003e\n\u003cli\u003eIdeal for creating compact guide scopes or all-sky cameras\u003c\/li\u003e\n\u003cli\u003eDurable, all-metal construction\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\u003eCS-1.25 Adapter\u003c\/h2\u003e\n\u003cp\u003eThe CS-1.25 adapter connects any CS-mount lens to a camera with a 1.25\" nosepiece or standard M28.5x0.6mm filter threads, making it an essential tool for creating a compact, wide-field guide scope. This simple adapter unlocks the potential of using small, lightweight, and often fast C-mount lenses for autoguiding or electronic finder 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\u003eConvert Your Guide Camera into a Wide-Field Scope with a 1.25\" Adapter\u003c\/h3\u003e\n\u003cp\u003eThis adapter is designed for one specific, critical task: bridging the gap between the CS lens standard and the 1.25\" format common to most astronomy guide cameras. By threading directly into the camera body or nosepiece, it allows you to attach a wide variety of affordable and compact CS-mount lenses, instantly converting your guider into a standalone, wide-field imaging system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFemale Thread (Lens Side):\u003c\/strong\u003e Accepts any standard CS-mount lens, popular in security and machine vision applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale Thread (Camera Side):\u003c\/strong\u003e Features M28.5x0.6mm threads, which is the standard for 1.25\" astronomy filters. This allows it to screw into the filter threads found inside most 1.25\" camera nosepieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Use Case:\u003c\/strong\u003e Build a lightweight, wide-field guide scope. This is particularly useful for portable setups or for guiding on short focal length imaging telescopes where a traditional guide scope would be overkill.\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 primary function of the CS-1.25 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe CS-1.25 adapter is designed to connect a lens with a \u003cstrong\u003eCS-mount thread\u003c\/strong\u003e to an astronomy camera that has a \u003cstrong\u003e1.25\" nosepiece\u003c\/strong\u003e or accepts standard M28.5x0.6mm filter threads. This allows you to use widely available CS lenses as a compact guide scope or an all-sky camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the CS-1.25 adapter to my guide camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou typically unscrew the 1.25\" barrel that comes with your guide camera. The adapter's male M28.5x0.6mm threads will then screw directly into the camera's body where the barrel was attached. Once the adapter is secure, you can thread your CS-mount lens onto the adapter's female threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this CS-1.25 adapter work with C-mount lenses?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this adapter is specifically for \u003cstrong\u003eCS-mount lenses\u003c\/strong\u003e. While C-mount and CS-mount have the same thread diameter, they have different flange-to-sensor distances. A C-mount lens requires a longer distance and will not reach focus when attached to this CS-mount adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the CS-1.25 adapter to create a guide scope for imaging the North America Nebula (NGC 7000)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Pairing a short focal length CS lens (e.g., 12mm or 16mm) with your guide camera using this adapter is an excellent way to get a very wide field of view. This makes it easy to find multiple guide stars when imaging large deep-sky objects like the North America Nebula (NGC 7000) or the Andromeda Galaxy (M31).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact thread specifications for the CS-1.25 adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter has two threads:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFemale Thread:\u003c\/strong\u003e CS-mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMale Thread:\u003c\/strong\u003e M28.5 x 0.6mm (This is the standard thread size for 1.25\" filters)\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 CS-1.25 adapter compatible with Player One or ZWO guide cameras?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this adapter is compatible with most guide cameras that use a standard 1.25\" nosepiece with internal M28.5x0.6mm threads, which includes the vast majority of models from brands like Player One and ZWO.\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\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003eCS-Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM28.5 x 0.6mm (1.25\" Filter Thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eConnects CS lenses to 1.25\" astronomy cameras\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\"\u003eCS-1.25 Adapter\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":52913432527133,"sku":"POA-CS125","price":14.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-CS-1-25-adapter-1_5b992411-db15-489c-a5f2-b5a59e156d70.jpg?v=1789091128"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/player-one-camera-lenses-and-adapters.oembed","provider":"David Astro","version":"1.0","type":"link"}