The 10mm TeleVue Delos is a “do-it-all” eyepiece designed for medium high power/high contrast solar system and deep space observing with all
telescope types and sizes. It has a long 20mm eye relief that makes it ideal for eyeglass wearers. Many of the eyepieces in this focal length range have much shorter eye relief that makes them problematical for eyeglass use, but that is not an issue with the Delos. With 20mm of eye relief, its full 72° apparent field is easily usable with glasses.
To see what the field of view of this eyepiece would be with your telescope, click on the formula tab above.
There is an adjustable height eyeguard with a soft rolldown eyecup to shield the eye from ambient light (from a neighbor’s security light, for example) and improve the image contrast. The eyeguard height can be locked in place at any point desired. The rubber eyecup rotates for use with TeleVue Dioptrx astigmatism correcting lenses.
As a longer eye relief 72° field version of the acclaimed 100° field 10mm TeleVue Ethos, the 10mm Delos has all the virtues that astronomers have come to expect from an Ethos: high contrast, a neutral color balance, and full field sharpness – with well-controlled astigmatism, field curvature, lateral color, and angular magnification distortion correction. In addition, it has low pupil sensitivity (kidney bean effect) for daytime use.
The 10mm Delos has a 1.25” barrel that is threaded for standard 1.25” eyepiece filters. A safety groove is machined into the chrome barrel to engage your focuser thumbscrew. This will help prevent the eyepiece from falling should the thumbscrew accidentally loosen while observing. The main eyepiece barrel is narrow enough to comfortably use a pair of 10mm Delos in a binoviewer. Rubber grip rings provide a sure grip in cold weather when wearing gloves or mittens. Dust covers are provided for both ends of the eyepiece.
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