Equatorial Newtonian Reflector Telescope Manufacturer
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Home > Telescopes > Reflectors > Newtonian Equatorials
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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Newtonian Equatorials  
114mm/4.5"inch equatorial telescope
Item No. NDTF500x114
114mm (4.5"), FL=900mm
details require sample
 
114mm/4.5"inch equatorial telescope
Item No. NDTF900x114
114mm (4.5"), FL=900mm e
details require sample
 
114mm/4.5"inch equatorial telescope
Item No. NDTZF1000x114
114mm (4.5"), FL=1000mm
details require sample
 
130mm/5"inch equatorial telescope
Item No. NDTF650x130EQ7/AT2
130mm (5"), FL=650mm
details require sample
 
150mm/6"inch equatorial telescope
Item No. NDTF750x150
150mm (6"), FL=750mm
details require sample
 
150mm/6"inch equatorial telescope
Item No. NDTF1200x150EQ5/AT6
150mm (6"), FL=1200mm
details require sample
 
150mm/6"inch equatorial telescope
Item No. NDTZF1400x150EQ8/AT6
150mm (6"), FL=1400mm
details require sample
 
114mm/4.5"inch equatorial telescope
Item No. F500x114EQ-III-M
114mm (4.5"), FL=500mm
details require sample
 
114mm/4.5"inch equatorial telescope
Item No. F900x114EQ-III-A
114mm (4.5"), FL=900mm
details require sample
 
114mm/4.5"inch short tube Newtonian equatorial reflector equatorial telescope
Item No. F1000x114EQ-III-M
114mm (4.5"), FL=1000mm
details require sample
 
150mm/6"inch equatorial telescope
Item No. F750x150EQ-III-A
150mm (6"), FL=750mm
details require sample
 
150mm/6"inch, f=1400mm EQ3 short tube newtonian equatorial reflector telescope
Item No. F1400x150EQ-III-A
150mm (6"), FL=1400mm
details require sample
 
203mm/8"inch equatorial telescope
Item No. F800x203EQ-IV-A
203mm (8"), FL=800mm
details require sample
 
114mm/4.5"inch equatorial telescope
Item No. F900x114ET-7
114mm (4.5"), FL=900mm
details require sample
 
114mm/4.5"inch short tube Newtonian equatorial reflector telescope
Item No. F1000x114ET-7
114mm/ (4.5"), FL=1000mm
details require sample
 
150mm/6"inch short tube Newtonian equatorial reflector telescope
Item No. F750x150ET-8
150mm (6"), FL=750mm
details require sample
 
150mm/6"inch short tube Newtonian equatorial reflector telescope
Item No. F1400x150ET-8
150mm (6"), FL=1400mm
details require sample
 
More Reflectors
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| terrestrial telescopes | equatorial telescopes | Bird/Jones telescopes | parabolic telescopes | large telescopes |
| Dobsonian telescopes | Newtonian telescopes |
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