Excelsis Ratings/Reviews - Votes:Lumicon Coma Corrector/Field Flattener

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Lumicon Coma Corrector/Field Flattener

I just purchased a Lumicon Coma Corrector. Advantage over the Televue Paracorr is NO MAGNIFICATION. It's always bothered me that I pay a lot of money for Nagler eyepieces to get wide fields of view only to throw away 15% by magnifying it in the Paracorr.

I have used a Paracorr in my 13.1 f4.4 scope for several years. It does improve the sharpness of edge stars in my low to medium power eyepieces.

We recently compared the two and while both did very well on coma the unmagnified view in the Lumicon was preferable. Note too that the Lumicon has 1.8" aperture so there's no vignetting.

Keep in mind that the Lumicon will not work as a convienient accessory like the Televue. I unscrew the lens cell and mount it INSIDE MY FOCUSER to use it. If you slide the entire unit into your focuser the way it comes you'd need 2-3 inches of in-travel and you'll have to make sure the focal plane is 3.8" from the top lense of the corrector.

This is a nice way to deal with coma. if you position the corrector properly it will work for the 22mm and 31mm Naglers. For the other Naglers you need to pull the eyepieces out a little to get the proper seperaltion.

All in all the Lumicon get a 10 from me and the Paracorr gets an 8.

Overall Rating: 10
Performance:10 Value:9
Weight: 5 (Veritable Vote)
Date: 09/22/2003 12:34:38 pm PST
By: Roman
Link to this vote: http://www.excelsis.com/1.0/displayvote.php?voteid=303057

Reply Replies: 0

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