Iris Nebula by Thierry Boufflet
The catadioptric telescopes of the Epsilon series are wide-field astrographs with an hyperbolic primary mirror. A corrector is integrated in the rack-and-pinion focuser and allows to obtain a flat field with stars less than 10μm at the edge of the 44mm image circle.
The Epsilon-130D has a focal ratio of F/3.3. Its very short focal length of 430mm offers a field of view of 5.9° and is therefore ideal for imaging large areas of stars and nebulae. Its secondary mirror is mounted on a reinforced spider to avoid any flexion. The rack-and-pinion focuser is equipped with a CAA (Camera Angle Adjuster) for photographic framing.
The collimation of the Epsilon 130D is particularly easy because it does not need to be done on a star. The optical axis is represented by markings on the 2 mirrors. Takahashi has designed a simple collimation eyepiece system particularly adapted to the Epsilon allowing the adjustment of the mirrors in daylight, a big advantage compared to a classical telescope.
Regardless of its photographic qualities, the Epsilon is a first-rate wide-field observation telescope. The observation of star clusters and galaxies will give you intense pleasure due to the fineness of the stars. It proves to be a fabulous instrument for the deep sky and the search for comets. The observation of the Lagoon and Trifide nebulae in the same field is extraordinary and striking.
| Characteristic | Takahashi Epsilon-130D reflector |
| Optical design | Modified hyperbolic Newtonian |
| Combination | Hyperbolic primary mirror + flat secondary mirror + field flattener |
| Diameter | 130 mm |
| At prime focus | |
| Focal length | 430 mm |
| Focal ratio | FD 3.3 |
| Image circle diameter | 44 mm |
| Metal Back Distance | 56.2 mm |
| Characteristic | Takahashi Epsilon-130D reflector |
| Length of the optical tube assembly | 460 mm |
| Diameter of the optical tube assembly | 166 mm |
| Weight | 4.9 kg |
Takahashi Epsilon-130D, Spot-diagram at prime focus
| System-chart of the Takahashi Epsilon-130D reflector | Télécharger |
| Instruction manual of the Takahashi Epsilon-130D reflector | Télécharger |
gallery
Iris Nebula by Thierry Boufflet
The Rosette Nebula by Gérard Thérin
Great Orion Nebula by Gérard Thérin
The Cocoon nebula by Gérard Thérin
The Horsehead nebula by Gérard Thérin
North America and Pelican nebulae by Rémi Petitdemange
IC1848 nebula by Rémi Petitdemange
North America and Pelican nebulae by Rémi Petitdemange
NGC1333 nebula by Tommy Nawratil
The Pleiades by Tommy Nawratil
