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Epsilon-180ED reflector

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

Takahashi Epsilon-180ED reflector

Characteristics Takahashi Epsilon-180ED reflector
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

Takahashi Epsilon-180ED reflector

Characteristic Takahashi Epsilon-180ED reflector
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] - 7x50 finder scope (orange)
[TKA00563B] - Bracket for 7x50 finder scope (black)
[TKA68420S] - Tube rings 232WS
[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