Product Description
It provides an almost 4.5mm exit pupil with an f/4.5 Dobsonian reflector for rich field scanning of the Milky Way star clouds in Sagittarius. It's an excellent choice to complement the 40mm eyepiece provided with some go-to Schmidt-Cassegrains. It has a somewhat short eye relief that will limit the field for eyeglass wearers. Those who must wear eyeglasses while observing due to severe astigmatism would probably be better off using a Barlow and a longer focal length eyepiece with longer eye relief to reach this focal length, rather than buying this eyepiece for use on its own.
Tech Details
Barrel Size | 1.25" |
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Eye Relief | 11mm |
Field of view | 50 |
Focal Length | 20mm |
Number of optical elements | 4 |
Weight | 4 oz |
Warranty | Limited Lifetime |
Reviews
Cannot go wrong with this one. (Posted on 10/17/2019)
fast reflectors. Great contrast and sharpness. Cannot go wrong with this one. (Posted on 10/17/2019)