1 x 90mm Refractive Astronomical Telescope Double Separation Lens - Multi-Layer Coating (D90F500 Broadband Film)

OPTICAL - This 90mm dual separation lens provides outstanding images with a combined rating of 1/4-1/8, ensuring clear and crisp astronomical observations. Versatile Focal Lengths: Available in 500mm, 650mm and 1000mm focal lengths, this lens is perfect for various astronomical applications, allowing you to customize your viewing experience. Durable multi-layer coating: choose from green or blue multi-layer coatings for better light transmission and reduced glare, optimizing the performance of your telescope under different viewing conditions. Precision Engineering: With strict diameter tolerances of +0/-0.12mm and focal length tolerances of ±0.1%, this lens is designed for precision, making it suitable for both amateur and professional astronomers. COMPLETE PACKAGE - Each purchase includes an objective lens, designed for easy mounting and compatible with most refractive astronomical telescopes, to enrich your star-watching adventures.