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Old 11-09-2013, 11:03 AM
malclocke (Malc)
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malclocke is offline
 
Join Date: Jun 2012
Location: Christchurch, New Zealand
Posts: 183
I have the same problem reaching prime focus with my GSO880 and a DSLR, but I work around it using a barlow rather than eyepiece projection. I am able to get enough in focus with a webcam and a QHY5 guide cam, but not my DSLR, can't rack it in far enough.

Generally I think people either fit a low profile focuser or cut down the tube, thus moving the mirror closer to the focuser, to get around it.

I haven't done the maths but I suspect I could get most of the moon in frame if I didn't have the barlow in place. As it is I use a mosaic app to stitch frames together, the results come out OK.

http://www.flickr.com/photos/malclocke/9506224363/

Malc
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