1pc Double Separated Blue/Green Film Objective Lens for Astronomical Telescopes - 106mm D, 600mm/900mm Focal Length Options(Metal Holder)

Optics: The D106F600 and D106F900 objective lenses feature multi-layer blue and green film coatings, providing superior light transmission and image clarity for astronomical observations. Versatile Focal Length Options: Choose between 600mm and 900mm focal lengths to suit your astronomical viewing needs, enhancing your telescope's performance for stargazing and planetary observation. Durable Construction: Made with an aluminum alloy base and oxidized black surface treatment, these lenses are devised for longevity and stability, ensuring reliable performance in various conditions. Easy Installation: devised to fit directly onto a 110mm PVC pipe, the objective holder allows for straightforward assembly, making it ideal for DIY telescope projects and upgrades. Precision Engineering: With a diameter tolerance of +0/-0.12mm and a combined image rating of 1/4-1/8, these lenses provide exceptional accuracy and detail for serious astronomy enthusiasts.