BDCJ D203F1000 1/10 high Precision parabolic Astronomical Telescope Main Lens by DHL

Description

• D203F1000 1/10 high Precision parabolic Astronomical Telescope Main Lens
• The diameter is 203mm and the focal length is 1000mm. Use K9 material glass
• 20mm thickness, 84% aluminum film and protective film
• Surface accuracy PV guarantee is better than 1/10 wavelength of light wave
• Package:1pc D203F1000 Main Lens by Hand polished

This model is D203F1000 parabolic, 203mm diameter, 1000mm focal length, made of K9 material, thickness 20mm, coated with 84% aluminum film and protective film, and the surface accuracy of PV is guaranteed to be better than 1/10 of the wavelength of light.
Lens accuracy: PV guarantee of parabolic surface accuracy is better than 1/10 wavelength of light wave, spherical aberration is less than 1/15 wavelength.
The mirror blank is made of K9 material, some of which are high borosilicate material.
The thickness of the lens is 1/8-1/10 of the diameter.
The main lens with the best precision at present.
Aluminized film and silicon dioxide protective film, the coating can be used for 8-10 years under moisture-proof storage.

Reminder: This product is purely hand-polished, and it is inevitable that there will be minor flaws. The common problem is a small amount of scratches on the coating, which are guaranteed not to affect the normal observation. Please do not buy if you mind.

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