Achromatic D40 lens with 40mm diameter and 205mm focal length, perfect for enhancing your DIY refractive astronomical telescope. This lens coated with a self-adhesive blue film minimises chromatic aberration and ensures clearer and sharper images of objects. Designed for easy installation, easily 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 telescopic structures, making it an indispensable accessory for astronomy enthusiasts and hobbyists. Each package contains 1 piece of the D40 lens, so you have the right component for your telescope project.
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