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The Takahashi Epsilon 180-ED is an ultra-fast widefield astrograph with a flat-field design for serious astrophotography. Featuring a hyperbolic primary mirror and integrated corrector, the Epsilon 180ED provides very good correction over a 44mm image circle, with stars at the edge of the field being less than 10 microns in size.
The Epsilon 180ED is equipped with a precise rack and pinion focuser with camera angle adjuster for easy framing of targets. The Epsilon 180ED has a native focal length of 500mm and a focal ratio of f/2.8, making it the perfect instrument for imaging of large nebulae and star clusters.
Despite its photographic focus, the Epsilon doubles as an exceptional wide-field visual telescope, thanks to its fine optical correction. Collimation is straightforward with markings on each mirror and the included collimation eyepiece, allowing adjustment during the daytime.
Spot diagram of Takahashi Epsilon 180ED at prime focus.