Celestron Omni 4mm

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Brand and Model:Celestron Omni 4mm
Price ($USD):$39.95
Focal Length:4 mm
Barrel Size:1.25
Apparent FOV:50.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:0 mm
Weight (lbs):3
Description:This fully-multicoated eyepiece is one of the shortest focal length and most economically-priced Plössl eyepieces available. It’s designed for very high magnification lunar and planetary observing and for splitting close binary stars. The field of view is surprisingly wide when compared with other Plössls in this focal length range. A soft rubber eyecup on the titanium-colored body shields the eye from ambient light and fods down for more comfortable eyeglass use.

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Celestron Omni 4mm
Believe it or not, this is the biggest seller in the Omni line. That's probably because it is a fairly sharp and contrasty EP. The eye relief is too short for me, and the eye lens far too small to make this a useful EP for me. It is about the cheapest 4mm Plossl that throws up a good image, so I suspect folks buy it for star testing and such where they don't look through it much. If you need to star test a fast Dob, then this would be a good cheap EP to do the trick. Otherwise, I would say pass on it and get something with some eye relief like a TMB, Star Splitter, Hyperion, Radian, Lanthanum, Tak LE, etc.

Overall Rating: 6
Optics:6 Value:6
Weight: 1 (Unreliable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=560299

Celestron Omni 4mm
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: 3
Optics:8 Value:3
Weight: 1 (Unreliable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=409127

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