Achromatic lens D40 designed for refractive telescopes manufactured by us, guaranteeing clear and accurate astronomical observations. Features an actual diameter of 40mm and a focal length of 205mm, optimized for improved light transmission and reduced chromatic aberration. Coated with a blue adhesive film, providing excellent durability and protection while maintaining optimal optical performance. Easy to assemble; simply position the thin side of the lens towards the stage for precise alignment and clarity. Perfect for astronomy enthusiasts and hobbyists looking to build or upgrade their own telescopes with premium optical components.
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