D40 achromatic lens with 40mm diameter and 205mm focal length, perfect for enhancing your DIY refractive astronomical telescope. Coated with blue adhesive film, this lens minimizes chromatic aberration, providing clearer and sharper image of objects. Designed for easy mounting; simply position the thin side of the lens towards the scene 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 D40 lens, making sure you have the right component for your telescope project.
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