{"product_id":"baader-planetarium-solar-diaphragm-13mm-113mm-stepless-adjustable","title":"Baader Planetarium Solar Diaphragm 13mm - 113mm, stepless adjustable","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSteplessly Adjustable Aperture: 13mm to 113mm\u003c\/li\u003e\n\u003cli\u003eIdeal for Optimizing Solar Views in Refractors\u003c\/li\u003e\n\u003cli\u003eDIY Mounting Pattern: Four M3 threads\u003c\/li\u003e\n\u003cli\u003eStandard Pitch Circle: 60mm radius for easy integration\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\u003eSolar Diaphragm 13mm - 113mm, stepless adjustable\u003c\/h2\u003e\n      \u003cp\u003eThe Solar Diaphragm provides stepless aperture control from 13mm up to 113mm, making it an essential component for custom solar observing setups. For mounting, it features a pattern of four M3 threads on a 60mm pitch circle radius, allowing for secure integration into DIY filter holders and telescope adapters.\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\u003eStepless Aperture Control from 13mm to 113mm\u003c\/h3\u003e\n      \u003cp\u003eThis variable iris allows you to precisely dial in the optimal aperture for your observing conditions, ranging continuously from 13mm to 113mm. By stopping down a larger refractor, you can significantly reduce the effects of atmospheric seeing, often resulting in a steadier and sharper image of sunspots and granulation. The ability to fine-tune the aperture without fixed steps is critical for finding the perfect balance between image brightness and stability on any given day.\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\u003eCustom Mounting with 4x M3 Threads on a 60mm Circle\u003c\/h3\u003e\n      \u003cp\u003eDesigned for custom applications, the diaphragm includes four pre-drilled M3 threads on the telescope side. These mounting points are arranged on a 60mm pitch circle radius, providing a standardized and secure pattern for attaching the iris to a custom-built filter cell, telescope adapter plate, or other DIY holder. This makes it a versatile component for amateur telescope makers and solar observers building specialized equipment.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 13-113mm Solar Diaphragm a complete solar filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eAbsolutely not.\u003c\/strong\u003e This is a mechanical iris diaphragm only. It reduces the amount of visible light but does \u003cstrong\u003eNOT\u003c\/strong\u003e block harmful invisible radiation (UV and IR). You must use this device in conjunction with a certified, full-aperture solar filter designed to safely view the sun. Failure to do so will result in permanent eye damage and equipment destruction.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for the Solar Diaphragm?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts primary use is to reduce the effective aperture of a telescope, typically a refractor, for white-light solar observing. This helps to sharpen the image and increase contrast by mitigating the effects of atmospheric turbulence (seeing). It allows you to use the \"sweet spot\" of your telescope's objective lens.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I mount the Solar Diaphragm to my telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe diaphragm is intended for custom, do-it-yourself installations. It has \u003cstrong\u003efour M3 threads\u003c\/strong\u003e on a \u003cstrong\u003e60mm pitch circle radius\u003c\/strong\u003e, which you can use to bolt it onto a custom-made filter holder, an adapter plate, or another mounting solution that fits your specific telescope.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Solar Diaphragm on my 8-inch SCT?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile it could be mechanically adapted, this diaphragm is primarily designed for refractors. For Schmidt-Cassegrains and other reflecting telescopes, an off-axis aperture mask is typically preferred to avoid exacerbating thermal issues and image degradation caused by the central obstruction.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this diaphragm help me see solar prominences on my 100mm refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This is a mechanical device for optimizing white-light solar observing (sunspots, granulation). Viewing solar prominences requires a specialized, narrow-bandpass Hydrogen-alpha (H-alpha) filter system, which operates on entirely different principles.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a stepless adjustment better than fixed aperture masks?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAtmospheric seeing conditions change constantly. A stepless diaphragm allows you to fine-tune the aperture in real-time to find the exact diameter that provides the steadiest view, a capability that fixed-size masks cannot offer. You can adjust from \u003cstrong\u003e13mm to 113mm\u003c\/strong\u003e to perfectly match the conditions of the moment.\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      \u003ctr\u003e\n\u003ctd\u003eAperture Range\u003c\/td\u003e\n\u003ctd\u003e13mm - 113mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAdjustment Type\u003c\/td\u003e\n\u003ctd\u003eSteplessly Variable\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Threads\u003c\/td\u003e\n\u003ctd\u003e4x M3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Pattern\u003c\/td\u003e\n\u003ctd\u003e60mm Pitch Circle Radius\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cp\u003eThis product is a single component and does not include additional accessories.\u003c\/p\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cp\u003ePlease contact us for warranty information on this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":52913274388765,"sku":"BAA-2459300","price":445.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/BaaderPlanetarium-Solar-Diaphragm-13mm-113mm-stepless-adjustable-1_297f3c4a-7eaf-46b4-be2e-a0855861e80a.jpg?v=1789088986","url":"https:\/\/davidastro.com\/fr-us\/products\/baader-planetarium-solar-diaphragm-13mm-113mm-stepless-adjustable","provider":"David Astro","version":"1.0","type":"link"}