| This medium focal length eyepiece, with its exceptionally long eye relief for eyeglass use, is usable with any scope type, under virtually any seeing conditions – from fair to superb. With short focal length refractors, it’s a low power/wide field eyepiece. With long focal length refractors, reflectors, or catadioptric scopes it’s an excellent medium/medium high magnification eyepiece for nebula, galaxy, and globular cluster observing. Its rubber-clad body gives a sure and comfortable grip in all temperature extremes. Its optical performance more than holds its own with other quality eyepieces in its price range, such as a good Plössl. There is a slight loss of contrast when compared to a Plössl, however, due to the additional optical elements needed to achieve the long eye relief of this Vixen. The loss is minimal though, and this Vixen has the benefit of much longer eye relief for eyeglass wearers. Still, this Vixen should be considered more for its virtue as a very eyeglass-friendly eyepiece (particularly at a price half that of other 20mm eye relief eyepieces in this focal length range), rather than for any exceptional optical excellence. |
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