131mm Optical Dual Objective Lens DIY Astronomical Telescope FL 750mm

Dual  Separation Achromatic Lens

Material: Optical Glass

Lens Valid Diameter:127mm

Lens Total Diameter Size 131mm

Focal Length:750,1200mm Green/Blue Film

Astronomical telescope objective lens with multilayer Green film

Combined image quality 1 / 4-1 / 8

Diameter tolerance + 0 / -0.12 mm

Center thickness tolerance ± 0.2mm

Focal length tolerance ± 0.1%

Finish 60/40

Off-centre 1 '

Remarks: two-piece refractive double separation objective lens group;

Used for astronomical telescope objectives, finder and collimation objective Lens

Return or Exchange

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If item is defective in 3 months, We will send you a replacement without extra charger, or offer refund after we receive the defective item.
If item is defective after 3 months, you can still send it back to us.
We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.


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Items will be shipped within 1-10 business days on payment received.
Delivery time depends on destination and other factors, it may takes up to 20 business days.