90mm Double Separation Objective Lens for Refractive Astronomical Telescopes - Focal Length Options 500mm/650mm/1000mm(D90F1000 Blue Film)
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90mm double separation objective lens devised for refractive astronomical telescopes, enhancing your stargazing experience. Available in three focal lengths: 500mm, 650mm, and 1000mm, allowing for versatile applications in astronomical observations. Features optional multi-layer coatings (green or blue film) to improve light transmission and image clarity for better viewing. Precision-engineered with tight tolerances: diameter tolerance of +0/-0.12mm and focal length tolerance of ±0.1% for optimal performance. Includes one complete lens assembly, ideal for DIY enthusiasts looking to upgrade or build their own astronomical telescope.
Description
(1)
90mm double separation objective lens devised for refractive astronomical telescopes, enhancing your stargazing experience. Available in three focal lengths: 500mm, 650mm, and 1000mm, allowing for versatile applications in astronomical observations. Features optional multi-layer coatings (green or blue film) to improve light transmission and image clarity for better viewing. Precision-engineered with tight tolerances: diameter tolerance of +0/-0.12mm and focal length tolerance of ±0.1% for optimal performance. Includes one complete lens assembly, ideal for DIY enthusiasts looking to upgrade or build their own astronomical telescope.
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