90mm Refractive Astronomical Telescope Dual Separation Lens - Focal Length Options 500mm/650mm/1000mm(D90F900 Green Film)
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90mm diameter double separation lens designed for refractive astronomical telescopes. Focal lengths available of 500mm, 650mm and 1000mm to meet your various astronomical viewing needs. Features an optional green or blue multilayer coating for better light transmission and image clarity. Precision engineered with a diameter tolerance of +0/-0.12mm and a focal length tolerance of ±0.1% for optimal performance. Includes a piece of the lens' lens, perfect for DIY telescope assembly or for upgrading 'existing equipment.
Description
(1)
90mm diameter double separation lens designed for refractive astronomical telescopes. Focal lengths available of 500mm, 650mm and 1000mm to meet your various astronomical viewing needs. Features an optional green or blue multilayer coating for better light transmission and image clarity. Precision engineered with a diameter tolerance of +0/-0.12mm and a focal length tolerance of ±0.1% for optimal performance. Includes a piece of the lens' lens, perfect for DIY telescope assembly or for upgrading 'existing equipment.
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