TAKAHASHI
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.
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EPSILON-180ED REFLECTOR OTA
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.
Καθ.Βάρος (γρ.) | 10700 |
---|---|
Οπτικός Σχεδιασμός | Κατοπτρικό Newtonian (Νευτώνιο) |
Διάμετρος (mm) | 180 |
Εστιακή Απόσταση - F (mm) | 500 |
Εστιακός Λόγος (f/) | 2.8 |
Στήριξη | Δεν περιλαμβάνεται στήριξη ή τρίποδας |
Μέγιστη Ωφέλιμη Μεγέθυνση (x) | 360 |
Characteristics | Takahashi Epsilon-180ED reflector |
Optical design | Modified hyperbolic Newtonian |
Combination | Hyperbolic primary mirror + flat secondary mirror + field flattener |
Length of the optical tube assembly | 570 nm |
Diameter of the optical tube assembly | 232 nm |
At prime focus | |
Focal length | 500 mm |
Focal ratio | F/2.8 |
Image circle diameter | 44 mm |
Metal back distance | 56.2 mm |
Spot-diagram of the Takahashi Epsilon-180ED reflector at prime focus