Objective Lens， 1PC 103mm Telescope Cemented Doublet Objective Lens Achromatic Double Convex Focal Length 405mm K9 Optic Glass,for Doublet Convex Lens

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

• Made optical glass with precision polishing, ensuring stable performance and long service life.
• This 1-piece cemented doublet objective lens has a 103mm diameter, 405mm focal length, and achromatic double convex design, crafted from K9 optic glass for DIY telescopes.
• The achromatic structure effectively corrects chromatic aberration, minimizing color distortion and delivering sharp, images for celestial and astronomical observation.
• Made of premium K9 optical glass with fine polishing, it ensures excellent light transmittance, low distortion, and stable performance for long-term use in telescope projects.
• Its cemented doublet design enhances imaging stability, while the double convex structure optimizes light gathering, perfect and amateur astronomy enthusiasts.
• Standard size and simple installation make it an ideal core component for DIY telescope assembly, replacement, or performance upgrade, meeting amateur observation needs.