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Home > Telescopes > Refractors > Terrestrial Telescopes
What is a "Refractor"?
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telescopes knowledge   A refracting or refractor telescope is a type of optical telescope which refracts 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. This can enable a user to view a distant object as if it were brighter, clearer, and/or larger. These are similar to microscopes. The monocular is a type of refractor. A typical refractor has two lenses, an objective lens and an eyepiece lens. The objective lens has two pieces of glass (with different densities), "crown" and "flint glass". Each side of each piece is ground and polished, and then the two pieces are glued together. The curvatures are designed to cancel chromatic and spherical aberration.
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Telescope Designs
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subject related telelscopes  In general, there are two kinds of telescope systems. One is the Optical Telescope. This is our main manufacturing base. The other is the radio telescope, which is used for National & Scientific research . We manufacture only a few of these.
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Telescope Reviews
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  Telescope reviews from our clients and end users. Please feel free to post your own comments.
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Terrestrial Telescopes
2.8"inch/70mm terrestrial telescope
Art No. NDT350x70
70mm (2.8"), f=350mm
details require sample
 
3"inch/80mm terrestrial telescope
Art No. NDT400x80
80mm (3"), FL=400mm
details require sample
 
3.5"inch/90mm terrestrial telescope
Art No. NDT500x90
90mm (3.5"), FL=500mm
details require sample
 
2"inch/50mm terrestrial telescope
Art No. F360x50M
50mm (2"), FL=360mm
details require sample
 
2.8"inch/70mm terrestrial telescope
Art No. F300x70M
70mm (2.8"), FL=300mm
details require sample
 
2.8"inch/70mm terrestrial telescope
Art No. F400x70M
70mm (2.8"), FL=400mm
details require sample
 
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| terrestrial telescopes | portable telescopes | equatorial telescopes | achromatic telescopes | large telescopes |
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