Achromatic D70mm Lens for DIY Astronomical Telescopes - 400mm Focal Length with Self-Adhesive Blue Film (73F400 Green Turned Black)
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Achromatic D70mm lens designed for DIY astronomical telescopes to ensure clear and sharp images. Available in multiple focal lengths: 400mm with blue adhesive film, 280mm with green adhesive film and 330mm with standard adhesive film. The actual diameter is 73 mm, which provides a perfect fit for different telescopic models and improves your star watching experience. Easy to install with clear instructions: the thin side of the lens points for object, while the thick side shows for lens barrel to achieve optimal performance. 1 piece per pack, ideal for hobbyists and professionals who want to upgrade or build their own telescope for astronomical observation.
Description
(1)
Achromatic D70mm lens designed for DIY astronomical telescopes to ensure clear and sharp images. Available in multiple focal lengths: 400mm with blue adhesive film, 280mm with green adhesive film and 330mm with standard adhesive film. The actual diameter is 73 mm, which provides a perfect fit for different telescopic models and improves your star watching experience. Easy to install with clear instructions: the thin side of the lens points for object, while the thick side shows for lens barrel to achieve optimal performance. 1 piece per pack, ideal for hobbyists and professionals who want to upgrade or build their own telescope for astronomical observation.
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