D40 achromatic lens with a diameter of 40 mm and a focal length of 205 mm, perfect for enhancing your DIY refractive astronomical telescope. Coated with a blue adhesive film, this lens minimizes chromatic aberration, providing clearer and sharper images of objects. Designed for easy assembly; simply position the thin side of the lens towards the stage and the thick side towards the mirror tube for optimal performance. Compatible with various DIY telescope configurations, making it an essential accessory for astronomy enthusiasts and hobbyists. Each package includes 1 piece of D40 lens, ensuring you have the right component for your telescope project.
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