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Old 16-05-2016, 01:15 PM
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gregbradley
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Join Date: Feb 2006
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Quote:
Originally Posted by Shiraz View Post
eg, some early examples Greg - apologies if these have already been linked to or if you have already seen.

(Richard's link to Emil's image) 2000x1second!!!! subs http://www.astrokraai.nl/dump/201605..._Kraaikamp.jpg

15 minute total narrowband comparison 45x20 seconds or 1x 900 seconds http://www.cloudynights.com/index.ph...tach_id=690427

~ 1 hour total colour - 54x30 seconds bin 2 for each of RGB http://www.cloudynights.com/index.ph...tach_id=690357

It has already gone past mere speculations and predictions Greg - and it looks like cMOS is poised to make some fundamental changes to our hobby. Unfortunately that is going to be a pretty scary time for some.

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.
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