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Refracting telescope - A refracting or refractor telescope is a type of optical telescope that refracts or bends light at each end using lenses. This refraction causes parallel light rays to converge at a focal point; while those which were not parallel converge upon a focal plane.
Schmidt-Cassegrain telescope - A Schmidt-Cassegrain Telescope, invented by Bernhard Schmidt, is a catadioptric telescope. This type of telescope is advantageous because it combines the long focal length of the refracting telescope with the lower cost per aperture of the reflecting telescope.
James Lick telescope - The James Lick Telescope is an antique refracting 36 inch (91.44 cm) telescope that can still be viewed through today.
Telescope - [cm refracting telescope at Nice Observatory].
All About Telescopes - Information on refracting, reflecting and radio telescopes, details on amateur telescopes, eyepieces, mounts, lenses and software.
Amateur Telescope Optics - Presents information on aberrations, obstruction effects, and reflecting, refracting, and catadioptric objectives, and the eyepiece and eye.
R.F. Royce - Precision Optical Components - Compound reflective optical systems including Cassegrain, Ritchey-Chretien, Dall-Kirkham and various modifications. Refractive systems including achromatic and apochromatic objectives and full aperture corrector catadioptric systems including Schmidt, Maksutov and Houghton types along with near focal ...
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Dobsonian Telescopes - Dobsonian Telescopes Turn Left at Orion: A Hundred Night Sky Objects to See in a Small Telescope--And How to Find Them by Guy Consolmagno, A superb guidebook described in Bookwatch as 'the home ...
Construction Design Large Optical Telescope - Construction Design Large Optical Telescope Polaris DS-2060ATA Telescope Large 60mm Diameter Refractive Lens captures more light for brighter images and greater detail Two premium 1. ...
Dobsonian Telescope - Dobsonian Telescope Turn Left at Orion: A Hundred Night Sky Objects to See in a Small Telescope--And How to Find Them by Guy Consolmagno, A superb guidebook described in Bookwatch as 'the home ...
Collimating Dobsonian Telescope - Collimating Dobsonian Telescope Turn Left at Orion: A Hundred Night Sky Objects to See in a Small Telescope--And How to Find Them by Guy Consolmagno, A superb guidebook described in Bookwatch as 'the home ...
Binoculars Dobsonian Telescope - Binoculars Dobsonian Telescope Asterisms for Small Telescopes And Binoculars Asterisms for Small Telescopes And Binoculars Meade 70AZ-ADR Telescope with 8 x 21 Binoculars ...
Obsession Telescope - Obsession Telescope One Giant Leap: The Story of Neil Armstrong by Don Brown, As a young boy, Neil Armstrong had ... He spent his free time reading stacks of flying magazines, building model airplanes, and staring through the homemade telescope mounted on the roof of his neighbor's garage. As a teenager, Neil became obsessed with the ...
Spherical Aberration - ... Spherical aberration - [plane] [sections] In optics, spherical aberration is an image imperfection that occurs due to the increased refraction of light rays that occurs when rays strike a lens or mirror near its edge, in comparison with those that strike nearer the center. It is often considered to be an imperfection of telescopes and other instruments which makes their focusing less than ideal due to the spherical shape of lenses ...
Fish Eye Lens - ... or crystalline lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to focus on the retina. Its function is thus similar to a man-made optical lens. fisheyelens ... the early amphibians lived during the Carboniferous, therefore, an their ancestor would have lived earlier, fish eye lens. Telescope Binoculars and Accessory - Telescope Binoculars and Accessory 50mm Objective x 600mm F.L. Refractor Telescope Bring the ...
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