Objective Lens， 72mm 73mm Cemented Doublet Lens DIY Astronomical Telescope Coating Achromatic Large Aperture Objective,for Doublet Convex Lens(D72F900 Green Film)

=========High-concerned chemical : None

• Made optical glass with precision polishing, ensuring stable performance and long service life.
• This cemented doublet objective lens is available in 72mm and 73mm sizes, designed for DIY astronomical telescopes. It features an achromatic structure and professional coating, serving as a core accessory and telescope assembly.
• Crafted with optical glass, the lens adopts a cemented doublet design to effectively correct chromatic aberration, ensuring clear, high-contrast imaging without color distortion during observation.
• Equipped with multi-layer anti-reflection coating, it enhances light transmittance, reduces glare and stray light, making celestial objects brighter and easier to observe even in low-light environments.
• The large-aperture design maximizes light collection, while the fine-polished surface ensures stable optical performance, low distortion, and long-term durability for daily use and DIY projects.
• Standard size fits most DIY refracting telescopes, easy to install and match. It is an ideal accessory for astronomy enthusiasts to assemble, replace or upgrade their homemade telescopes.