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DIY Newtonian reflection astronomical telescope Primary Mirror Parabolic Lens
$ 127.54
- Description
- Size Guide
Description
DIY Newtonian Reflection Astronomical Telescope Primary MirrorParabolic Lens
Dia. 150mm
Focal Length 400 600 750mm
Specification
Parabolic Lens
Diameter: 150mm
Focal Length 600mm / 750mm / 450mm
Please note: The focal 600mm needs to be customized, the production time is 1 month. Please do not take orders if disagree.
Focal ratio (the ratio of focal length to diameter) F1.2 or more can be done.
Lens accuracy: Parabolic Lens surface accuracy PV is guaranteed to be better than 1/10 light wavelength,
and spherical aberration is less than 1/15 wavelength.
The mirror blank is made of K9 material and some high boron silicon materials.
The thickness of the lens is 1/8-1/10 of the diameter.
The aluminum coating is added with a silica protective film, and the coating can be used for 8-10 years under moisture-proof storage.
Occasionally, there will be very slight scratches on the surface, which are basically invisible and will not affect use.
35mm Secondary Mirror, if need the secondary mirror, please click the follow link:
35mm Secondary Mirror
Elliptical plane mirror short axis D=35mm
Caliber D (short axis): 35mm
Side thickness H: 10mm
Surface accuracy λ: 1/4
Tolerance: ±0.5
Coating: Aluminized and protective film
Delivery details
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3. Delivery time depends on destination and other factors, it may takes up to 20 business days.
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