Astronomical Telescope Accessories, D52F200 D52F500 D43F330 Cemented Doublet Glued Convex Lens ED Achromatic Biconvex Objective for DIY Astronomic Telescope,for Used in Astronomy(D43F330 Blacked)

=========High-concerned chemical : NoneModel Number : YT1023121Diameter : 52mm 43mmfocal length : 200mm 500mm 330mm

• Lens edges blackened and internal matte threads effectively suppress stray light and glare, improving image contrast and making faint celestial objects easier to identify.
• With multiple models including D52F200, D52F500 and D43F330, these cemented doublet convex lenses fit DIY assembly of astronomic telescope objectives.
• Equipped with ED achromatic optical structure, it optimizes light path transmission and reduces light dispersion.
• The cemented biconvex design realizes stable light convergence to meet astronomical imaging requirements.
• Made of professional optical glass with stable structure, it is suitable for accessory replacement and telescope modification.
• Various parameter sizes are available to match corresponding inner diameter tubes for diverse astronomical DIY assembly projects.
• Multi-group multi-element optical glass construction with broadband anti-reflection coating on surfaces, effectively increasing light transmission and reducing reflection loss, delivering bright and sharp imaging.