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Old 17-08-2011, 01:15 PM
solissydney (Ken)
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solissydney is offline
Join Date: Mar 2006
Location: Sydney
Posts: 660
Coma Corrector. Further info

After having filed off 1mm from the back of the Canon T-piece thereby making the distance to the C-mos smaller I took another image for comparison of coma with my 12 inch F/5 using my Canon 5D. I still have elongated stars on the upper left. I wonder why.
Comments please on the difference regarding coma and vignetting.
Please see "coma corrector" from my earlier post down about 12 posts.
I don't know how to copy the other 2 images to here.

I found the image taken prior to filing off 1mm from the T-piece, placed on the right side.
I made the image lighter and smaller. Still think the come has gone?
Attached Thumbnails
Click for full-size image (M20.web.jpg)
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Click for full-size image (Eagle.web.jpg)
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Click for full-size image (M20.web.web.jpg)
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Last edited by solissydney; 17-08-2011 at 02:07 PM. Reason: Adding image
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