Takahashi epsilon serie
The Epsilons are specifiques astrographes telescopes. They are derived from newtonian telescopes, but the focuser include a four lens coma compensator. The shape of primary miror is an hyperbole. So they are called somtime "hyperbolic astrographe telescope". The image quality is great, even with medium format cameras. The tubes are generaly oranges except the carbon ones and some white ones.
Epsilon 130 (1984 - ?)
The small one. The focal lenght is 430mm and the f ratio is 3,3.
Epsilon 160 (1984 - until now)
| Aperture: 160mm Secondary mirror: 63mm Obturation: 0.39 Focal length: 530mm Focal ratio: f/3.3 Image circle: 49mm Weight of tube: 6.5kg |
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Epsilon 180 (2005)
This is the newest and the fastest telescope of that serie. The focal lenght is 500mm and the f ratio is 2,8! The coma corrector include ED lens.
| Aperture: 180mm Secondary mirror: 80mm Obturation: 0.44 Focal length: 500mm Focal ratio: f/2.8 Image circle: 44mm Image across field: 10 microns Metal back distance: 56mm Weight of tube: 10kgs |
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Epsilon 200 (1984-?)
This telescope is the lowest speed of the epsilon serie. The f ratio is "only" 4.
| Aperture: 200mm Focal length: 800mm Focal ratio: f/4 Image circle: 88mm Weight of tube: 13.5kgs |
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Epsilon 210 (1993-?)
This telscope was equiped with giant helical focus, and it was available in orange aluminium tube or black carbon tube.
| Aperture: 210mm Secondary mirror: 80mm Obturation: 0.40 Focal length: 628mm Focal ratio: f/3 Image circle: 57mm Weight of tube: 11.5kgs |
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Epsilon 250 (1987-?)
| Aperture:
250mm Secondary mirror: 95mm Obturation: 0.38 Focal length: 854mm Focal ratio: f/3.4 Image circle: 70mm Weight of tube: 19kgs |
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| in 1987 the tube was in aluminium and the focus was standard one | After (1992), you can found carbon tube and helical focuser |
These is also white aluminuium tube |
Epsilon 300
| Aperture: 300mm Secondary mirror: 107mm Obturation: 0.36 Focal length: 1130mm Focal ratio: f/3.8 Image circle: 63mm Weight of tube: 45kgs |
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Epsilon 350 (1997- )
| Aperture: 350mm Secondary mirror: 107mm Obturation: 0.30 Focal length: 1248mm Focal ratio: f/3.6 Weight of tube: 66kgs |
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