Celestron Omni 20mm

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Brand and Model:Celestron Omni 20mm
Price ($USD):$39.95
Focal Length:20 mm
Barrel Size:1.25
Apparent FOV:52.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:0 mm
Weight (lbs):3
Description:This is a good quality fully-multicoated medium power eyepiece for lunar observing, resolving globular clusters, picking up detail in emission and reflection nebulas, etc. 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 and the larger nebulas. It's an excellent choice to complement the 40mm eyepiece provided with some go-to Schmidt-Cassegrains. It will work well with any telescope type, at any focal ratio, under any seeing conditions. A soft rubber eyecup shields the eye from ambient light and folds down for more comfortable eyeglass use. A knurled rubber ring on the titanium-colored barrel provides a secure grip when changing eyepieces in cold weather.

Vote Highlights Vote
Celestron Omni 20mm
This is my second favorite EP in the Omni line, the best being the 25mm Omni. Eye relief will be short if wearing glasses, but OK otherwise. The 20mm takes a shorty Barlow better than the 25mm without vignetting becoming a problem. If you can't afford the Ultima EP's and their clones, this is the best you can do for $35 to $40. Plenty good enough for finder scope duty even if you are used to the premium EP's.

Overall Rating: 8
Optics:8 Value:9
Weight: 1 (Unreliable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=559320

Celestron Omni 20mm
The 32mm and 25mm are the best of the Plossl line. Bright images, decent field of view, and good eye relief. When you drop below 25mm, the eye relief starts to get a little short. Below 10mm the eye relief is negligable - to the point where I won't use them even if I won them.

Overall Rating: 7
Optics:8 Value:7
Weight: 1 (Unreliable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=409123

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