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Old 03-07-2009, 11:31 AM
Bob Jones
Bob Jones

Bob Jones is offline
 
Join Date: Feb 2008
Location: south west rocks
Posts: 23
More egg shaped stars -Orion EON 80-QHY8

Attached is the first image taken with my Orion EON 80 and QHY8. The coma was easily fixed by cropping the image which was probably necessary anyway.

In order to preserve the full view I'm hoping a Field flattener will correct the coma.Besides the Baader MPCC there are at least three field flatteners that might be suitable.

Televue TRF-2008
http://www.televue.com/engine/page.asp?ID=169

WilliamsOptics flattener-2
http://www.williamoptics.com/accessories/reducer_features.php

WilliamsOptics flattener-4
http://www.williamoptics.com/accessories/flattener4_features.php

It seems that the distance between the CCD and the reducer flange is critical.
Please, can anyone recommend which will work best. (if at all)

Bob Jones
Attached Thumbnails
Click for full-size image (OmegaCentauri-Coma1.jpg)
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