Primary Spherical
Posted: October 17th, 2011 | Author: admin | Filed under: Binoculars | Tags: primary spherical aberration, primary spherical telescope | No Comments »Primary Spherical
Ebay listings fοr Primary Spherical products.
Primary Spherical products οח Amazon:
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Orion 4.5 f/8 Primary Mirror $39.99 These are the same high-quality mirrors used in Orion reflector telescopes! Each mirror is precision ground and polished from molded optical glass blanks, aluminum coated to a minimum 88% reflectivity, then overcoated with silicon dioxide for a durable, lasting finish. Diffraction limited. All are parabolic mirrors except the 4.5″, which has a spherical figure. Perfect for home-build Newtonian tel… |
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Orion SpaceProbe 130 EQ Reflector $229.99 The Orion SpaceProbe 130 EQ Reflector is a Newtonian reflector telescope packaged with a sturdy equatorial mount, two Explorer II eyepieces, a 6×30 finder scope, and Orion‘s Starry Night Special Edition software. Invented by Sir Isaac Newton, reflector telescopes provide more light gathering power per dollar than any other telescope design. With 130mm (5.1 inches) of aperture, the SpaceProbe 130… |
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White Baytronix AstroVenture 4.5 Reflector Telescope Fast f/4.4 EQ Mount $199.99 Rich-Field 4.5 Inch Newtonian Reflector Telescope. Possibly the best reflector telescope value available today, this 4.5″ scope boasts a short 500mm focal length. As a result, this scope packs a super-fast F/4.4 F-ratio, making it an extremely powerful instrument for wide-field and deep space astronomy. With its tremendous light-gathering power, you can observe fabulous nebulae, galaxies, bin… |
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Green Baytronix AstroVenture 4.5 Reflector Telescope Fast f/4.4 EQ Mount $199.99 Rich-Field 4.5 Inch Newtonian Reflector Telescope. Possibly the best reflector telescope value available today, this 4.5″ scope boasts a short 500mm focal length. As a result, this scope packs a super-fast F/4.4 F-ratio, making it an extremely powerful instrument for wide-field and deep space astronomy. With its tremendous light-gathering power, you can observe fabulous nebulae, galaxies, bin… |
56 Arecibo Observatory
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