Objective Lens， 82.5mm 83mm Cemented Doublet Lens F316 F500 F720 F900 Optical Achromatic Telescope Objective Focal Length 316 500mm,for Doublet Convex Lens(82.5F316G)

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

• Made optical glass with precision polishing, ensuring stable performance and long service life.
• This 82.5mm & 83mm cemented doublet lens provides focal lengths of 316mm, 500mm, 720mm, 900mm, used as an achromatic objective for astronomical telescopes.
• The cemented doublet optical design effectively reduces chromatic aberration and delivers sharp, high-contrast images.
• Made optical glass with fine polishing, it ensures stable performance, low distortion and high light transmittance.
• Multiple focal length options satisfy different observation needs, suitable for DIY telescope assembly and upgrading.
• Standard caliber and reasonable structure make it easy to install and match various astronomical telescope systems.