Equatorial Telescope Mount Newtonian Reflector Telescope Manufacturer
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Home > Telescopes > Reflectors > Newtonian Reflectors
What is a "Newtonian"?
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The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1643-1727), using a parabolic primary mirror and a flat diagonal secondary mirror.

Newtonians are usually less expensive than comparable telescopes of other types. A high quality primary mirror can be made by hand by amateur astronomers. A short focal length can be obtained, leading to wide field, bright views. Long focal length Newtonian telescopes can give excellent planetary views.
There is no chromatic aberration caused by lenses as in a refractor
The eyepiece is at the top end of the telescope, allowing for a shorter and more stable mount.
The heavy primary mirror is at the bottom allowing for large portable scopes. Dobsonian mounted Newtonians can have a 40" primary mirror. Collimation is relatively easy. Newtonians have coma, which is blurring of images away from the optical center. This problem is worse the shorter the focal length. Newtonians with a focal length of f/6 or higher are considered to have little to no coma. Newtonians of a focal length of less than f/4 are often considered to have too much coma.

Newtonians have a central obstruction due to the secondary mirror in the light path. This obstruction and the diffraction spikes caused by the support structure (called the spider) of the secondary mirror reduces contrast.

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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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Item No.: NDTF500x114EQ4/AT2
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: DTF500x114EQ4/AT3
114mm/4.5"inch, f=500mm EQ4 equatorial reflector telescope
114mm (4.5"), FL=500mm
details require sample
 
Item No.: NDTF900x114EQ4/AT2
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: DTF900x114EQ4/AT3
114mm/4.5"inch, f=900mm EQ4 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: NDTZF1000x114EQ4/AT2
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: DTF1000x114EQ4/AT3
114mm/4.5"inch, f=1000mm EQ4 equatorial reflector telescope
114mm (4.5"), FL=1000mm
details require sample
 
Item No.: NDTF650x130EQ7/AT2
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: NDTF1000x130EQ7/AT2
76mm/3"inch EQ2 equatorial reflector telescope
130mm (5"), FL=1000mm
details require sample
 
Item No.: DTF1000x130EQ3/AT3
130mm/5"inch, f=1000mm newtonian EQ3 equatorial reflector telescope
130mm (5"), FL=1000mm
details require sample
 
Item No.: DTF750x150EQ3/AT3
150mm/6"inch, f=750mm EQ3 equatorial reflector telescope
150mm (6"), FL=750mm
details require sample
 
Item No.: NDTF750x150EQ8/AT6
76mm/3"inch EQ2 equatorial reflector telescope
150mm (6"), FL=7500mm
details require sample
 
Item No.: NDTF1200x150EQ5/AT6
76mm/3"inch EQ2 equatorial reflector telescope
150mm (6"), FL=1200mm
details require sample
 
Item No.: NDTZF1400x150EQ8/AT6
76mm/3"inch EQ2 equatorial reflector telescope
150mm (6"), FL=1400mm
details require sample
 
Item No.: F1000xD203TW
76mm/3"inch EQ2 equatorial reflector telescope
203mm (8"), FL=1000mm
details require sample
 
Item No.: 203x900EQ4
76mm/3"inch EQ2 equatorial reflector telescope
203mm (8"), FL=900mm
details require sample
 
Item No.: F900x76EQ II-A
76mm/3"inch, f=900mm EQ2 equatorial reflector telescope
76mm (3"), FL=900mm
details require sample
 
Item No.: F500x114EQ III-M
114mm/4.5"inch, f=500mm EQ2 equatorial reflector telescope
114mm (4.5"), FL=500mm
details require sample
 
Item No.: F900x114EQ III-A
114mm/4.5"inch, f=900mm EQ3 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: F1000x114EQ III-M
114mm/4.5"inch, f=1000mm EQ3 equatorial reflector telescope
114mm (4.5"), FL=1000mm
details require sample
 
Item No.: F750x150EQ III-A
76mm/3"inch EQ2 equatorial reflector telescope
150mm (6"), FL=750mm
details require sample
 
Item No.: F1400x150EQ III-A
150mm/6"inch, f=1400mm EQ3 short tube newtonian equatorial reflector telescope
150mm (6"), FL=1400mm
details require sample
 
Item No.: F800x203EQIV-A
203mm/8"inch, f=800mm EQ4 short tube newtonian equatorial reflector telescope
2030mm (8"), FL=800mm
details require sample
 
Item No.: F900x114ET-7
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=900mm
details require sample
 
Item No.: F1000x114ET-7
76mm/3"inch EQ2 equatorial reflector telescope
114mm (4.5"), FL=1000mm
details require sample
 
Item No.: F750x150ET-8
150mm/6"inch, f=750mm ET8 short tube newtonian equatorial reflector telescope
150mm (6"), FL=750mm
details require sample
 
Item No.: F1400x150ET-8
150mm/6"inch, f=1400mm ET8 short tube newtonian equatorial reflector telescope
150mm (6"), FL=1400mm
details require sample
 
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| terrestrial telescopes | altazimuth telescopes | equatorial telescopes | short tube telescopes |
| parabolic telescopes | large telescopes | Dobsonian telescopes | Newtonian telescopes |
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