{"product_id":"ioptron-tsf70","title":"iOptron 70mm Adjustable Solar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e70mm Clear Aperture\u003c\/li\u003e\n\u003cli\u003eFits Telescope Tubes with 86mm to 106mm Outside Diameters\u003c\/li\u003e\n\u003cli\u003eSolarLite Film with Optical Density 5 Rating\u003c\/li\u003e\n\u003cli\u003eBlocks All but 1\/1,000th of 1% of Incoming Sunlight\u003c\/li\u003e\n\u003cli\u003eDurable Machined Aluminum Frame\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\u003e70mm Adjustable Solar Filter\u003c\/h2\u003e\n      \u003cp\u003eThis 70mm Adjustable Solar Filter turns your daytime telescope into a safe solar observatory, using SolarLite film that transmits only 1\/1,000th of 1% of the Sun's light. Its machined aluminum cell provides a secure, adjustable fit for telescope tubes with an outside diameter from 86mm to 106mm. The filter's Optical Density 5 rating ensures protection for both your eyes and equipment, allowing you to observe sunspots, granulation, and transits with sharp, natural-color views.\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\u003eSolarLite Film: Safe White-Light Solar Viewing at OD 5\u003c\/h3\u003e\n      \u003cp\u003eThe core of this filter is its SolarLite solar film, a specialized polymer engineered for direct solar observation. With an Optical Density (OD) rating of 5, it blocks 99.999% of the Sun's intense light, including harmful ultraviolet and infrared radiation, allowing only a safe 1\/1,000th of 1% to pass through. Unlike some glass filters that can produce a colored tint, this film renders the Sun in a neutral, whitish-yellow hue, delivering high-contrast views of sunspots and surface granulation.\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\u003eMachined Aluminum Frame: Secure Fit for 86mm-106mm OTA Diameters\u003c\/h3\u003e\n      \u003cp\u003eA solar filter is only safe if it stays securely attached to your telescope. This model features a durable, machined aluminum frame with an adjustable inner diameter to accommodate a range of instruments. It provides a firm, reliable grip on any optical tube with an outside diameter between 86mm and 106mm, making it a versatile choice for many popular 70mm to 90mm refractors. The lightweight yet rigid construction ensures it won't strain your focuser or affect your telescope's balance.\u003c\/p\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 telescopes will this 70mm Adjustable Solar Filter fit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis filter is designed to fit any telescope, finder scope, or binocular with an outer tube diameter between \u003cstrong\u003e86mm and 106mm\u003c\/strong\u003e. Always measure the outside diameter of the front of your telescope tube, not the lens aperture, to ensure a correct and safe fit.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 70mm solar filter safe for direct solar viewing through a telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. The filter uses SolarLite film with an \u003cstrong\u003eOptical Density 5\u003c\/strong\u003e rating, which is the international safety standard for direct solar observation. It blocks 99.999% of sunlight, including all harmful IR and UV radiation. Always ensure the filter is securely mounted and has no scratches or pinholes before every use.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow will sunspots appear through this 70mm filter on my 80mm f\/7 refractor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eOn an 80mm refractor, this 70mm solar filter will provide excellent views of sunspot groups. You will clearly see the darker central umbra and the lighter, surrounding penumbra of larger spots. The SolarLite film provides a high-contrast, neutral-colored image, making it easy to track the daily changes and movements of sunspots across the solar disk.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between this SolarLite film and a glass solar filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eSolarLite film and glass filters are both safe when rated to OD 5, but they offer different viewing experiences and have practical trade-offs.\n    \u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSolarLite Film:\u003c\/strong\u003e Often provides sharper, higher-contrast views with a more neutral color balance (white\/yellow). It is also more lightweight and affordable. However, the film is more delicate and must be handled carefully to avoid punctures or wrinkles.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlass Filters:\u003c\/strong\u003e Extremely durable and easy to clean. They often impart an orange or reddish tint to the Sun's image, which some observers prefer aesthetically. They are typically heavier and more expensive than film filters.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I see solar flares or prominences with this 70mm filter during a solar eclipse?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This is a \u003cstrong\u003ewhite-light filter\u003c\/strong\u003e, designed for viewing the Sun's surface (photosphere), which includes sunspots and granulation. Solar flares and prominences are features of the Sun's chromosphere and are only visible with specialized, narrow-band hydrogen-alpha (H-alpha) filters and telescopes, which isolate a specific wavelength of red light.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I clean the SolarLite film on my 70mm filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe film is very delicate and should only be cleaned if absolutely necessary. Never use harsh chemicals or abrasive cloths. If you must clean it, use a gentle puff of air from a bulb blower to remove loose dust. For fingerprints or stubborn spots, you can lightly dab the area with a soft, lint-free tissue or cotton ball moistened with a gentle cleaning solution like diluted isopropyl alcohol. Do not rub or apply pressure.\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\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Material\u003c\/td\u003e\n\u003ctd\u003eSolarLite solar film\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilm Transmission\u003c\/td\u003e\n\u003ctd\u003e1\/1,000th of 1%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFrame Material\u003c\/td\u003e\n\u003ctd\u003eMachined aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFit Range (OTA Outer Diameter)\u003c\/td\u003e\n\u003ctd\u003e86mm to 106mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFilter Outer Diameter\u003c\/td\u003e\n\u003ctd\u003e112mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\"\u003e70mm Adjustable Solar Filter\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\/lunt-solar-system-warranty\" rel=\"noopener\" target=\"_blank\"\u003eLunt Solar Systems 5-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":52917293875485,"sku":"IOP-TSF70","price":69.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/iOptron-70mm-Adjustable-Solar-Filter-1_f0fc353d-49af-4b08-89fd-6aadd0ad4f16.jpg?v=1789142120","url":"https:\/\/davidastro.com\/fr\/products\/ioptron-tsf70","provider":"David Astro","version":"1.0","type":"link"}