1pc D80mm Glued Green Film Achromatic Objective Lens for DIY Astronomical Telescopes - HD Coated Large Aperture Lens(D80F440)

Achromatic devise: This D80mm objective lens features a glued green film that minimizes chromatic aberration, providing clear and sharp images for your astronomical observations. Versatile Focal Length Options: Choose from four different focal lengths (400mm, 440mm, 720mm, and 900mm) to suit your specific viewing needs and enhance your telescope's performance. Large Aperture for Enhanced Light Gathering: With an actual diameter of 83mm, this lens allows for maximum light transmission, making it ideal for viewing objects in low-light conditions. Easy Assembly Instructions: devised for DIY enthusiasts, the lens comes with clear assembly precautions, ensuring correct installation for optimal performance. Perfect for Astronomy Lovers: Whether you're a beginner or an experienced astronomer, this lens is compatible with various telescope setups, making it a must-have for your stargazing adventures.