Objective Lens， 60mm Double Glued Object Lens Focal Length 360mm 600mm 700mm 800mm Coated Green Film for DIY Refracting Astronomical Telescope,for Doublet Convex Lens(360mm)

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

• Made optical glass with precision polishing, ensuring stable performance and long service life.
• This 60mm double glued objective lens provides 360mm, 600mm, 700mm and 800mm focal lengths with green film coating, designed for DIY refracting astronomical telescopes.
• The double cemented structure effectively improves achromatic effect, reduces color aberration and ensures clear, high‑contrast imaging for celestial observation.
• Green film coating enhances light transmittance, reduces surface reflection and stray light, bringing brighter and more stable viewing experience.
• Made optical glass with fine polishing, it features low distortion, reliable performance and long service life for homemade telescopes.
• Multiple focal lengths are available to meet different observation needs, perfect for DIY assembly, replacement and upgrade of refracting telescopes.