Quote:
Originally Posted by Shiraz
|
The M101 image is particularly impressive. 27 minutes total each for rgb = 81 minutes. How is it so deep with such little total time? I take it M101 is not super bright and equivalent to say Omega Cent or even less bright. If you just showed me that image I would assume it was 12 hours total expoure or more.
The 900 second Ha of the Crescent seems a bit nicer than the shorter stacked image but that is also impressive. The 2000 image M51 is OK but the core is totally overexposed and blown. Perhaps merely a processing error.
I wonder also about how to process 2000 x 1 sec x 32mb files. They are the same size as my Proline 16803 and CCDstack starts to chuck a wobbly if I open more than about 12 of those! Sam mentioned some free software perhaps it handles large files better than CCDstack which is rather poor at that.
A great start.
I agree, this type of imaging will push for large aperture over tracking ability and high quality mounts. So a large dob with some basic tracker that can do 20 seconds would be good enough. Like Alex did with his 25 inch dob a few years back and a modded Sony NEX 5n.
Greg.