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M83 - first light f/4 newt and Atik 420
Hi all
Finally got a chance for an image with the new f/4 200mm 'astrograph' newt, and the Atik 420 monochrome CCD.
This image is 11x5min luminance only, I'm pretty happy with it - scope straight from the shop, not collimated, no coma corrector in place. Collimation looked reasonable through my broken Cheshire.... Guiding with PHD and a side mounted 100mm f/5 achromat.
CCD cooled to 10 deg C, 3 dark frames used in processing with nebulosity.
I was going to fiddle with the MPCC last night, but when I saw the first few frames pop up I pressed on, clouds are never too far away around here!
I'm after some thoughts on coma/collimation - I can see some coma like distortion, although the upper left corner seems less affected, maybe some guiding glitches also.....
No RGB any time soon, the 'astrograph' doesn't have enough back focus to accommodate the filter wheel, so a moonlite will be added at some point....
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