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Epsilon-180ED

An astrograph for large stellar fields and nebulae
Description

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 offers 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/2.8. Its very short focal length of 500 mm offers a field of view of 5° 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 primary mirror cell is equipped with 3 double-action adjusting screws (push/pull) with lock nut for pressure adjustment to minimise stress.

The collimation of the Epsilon-180ED is very 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.

Characteristics
Optical characteristics
Optical design Modified hyperbolic Newtonian
Combination Hyperbolic primary mirror + flat secondary mirror + field flattener
Diameter 180 mm
At prime focus
Focal length 500 mm
Focal ratio F/2.8
Image circle diameter 44 mm
Metal back distance 56.2 mm
Mechanical characteristics
Length of the optical tube assembly 570 mm
Diameter of the optical tube assembly 232 mm
Weight 10.7 kg

Spot-diagram of the Takahashi Epsilon-180ED reflector at prime focus

Documentation

System-charts

System-chart of the Takahashi Epsilon-180ED reflector Télécharger

Instruction manuals

Instruction manual of the Takahashi Epsilon-180ED reflector Télécharger

Available configurations

Epsilon-180ED reflector

Reference : [TEK18000S]
[TKA00552Y] - Finder 7x50 (orange)
[TKA00563B] - Finder bracket for 7x50 finder (black)
[TKA68420S] - Tube rings 232WS
[TEK18010] - Epsilon-180ED reflector OTA

Epsilon-180ED reflector OTA

Reference : [TEK18010]
[TEK18010] - Epsilon-180ED reflector OTA

gallery

The Virgo Cluster by Rémi Petitdemange

Snake Nebula by Rémi Petitdemange

The Pinwheel Galaxy by Rémi Petitdemange

The Triangulum Galaxy by Rémi Petitdemange

Epsilon-180ED reflector
Epsilon-180ED reflector
Epsilon-180ED reflector OTA
Epsilon-180ED reflector OTA