DIY Newtonian reflection astronomical telescope Primary Mirror Parabolic 150mm For Sale
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DIY Newtonian reflection astronomical telescope Primary Mirror Parabolic 150mm:
$237.49
DIY Newtonian Reflection Astronomical Telescope Primary Mirror
Parabolic MirrorDia. 150mmFocal Length 1200mm
Specification
Parabolic Lens
Diameter: 150mm
Focal Length 1200mm
Focal ratio (the ratio of focal length to diameter) F1.2 or more can be done.
Lens accuracy: Parabolic Lenssurface 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
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