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M42 - The Orion Nebula by Photosbykev M42 - The Orion Nebula by Photosbykev
Canon 7D and Canon 600mm f4 prime lens on an unguided EQ6 mount

20 x 4 minutes @ iso 800
20 x 2 minutes @ iso 800
20 x 1 minutes @ iso 800
20 x 30 seconds @ iso 800

plus flats and darks. Processed in DSS and finished in CS5


Reprocessed after some valid comments
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:iconsteelcowboy:
SteelCowboy Featured By Owner Apr 5, 2012  Professional Photographer
Just awesome work Kev
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:iconthestargazer23:
thestargazer23 Featured By Owner Apr 1, 2012  Hobbyist Photographer
Excellent work!
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:iconfeawen:
feawen Featured By Owner Mar 30, 2012  Professional Filmographer
Wow you took this yourself!?? That's awesome!!! I am totally amazed!!
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:iconphotosbykev:
Photosbykev Featured By Owner Mar 30, 2012  Hobbyist Photographer
it would be pointless posting images by others :)
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:iconfeawen:
feawen Featured By Owner Apr 1, 2012  Professional Filmographer
Lol yes indeed :p
But I am amazed to see that we don't need Hubble to take amazing pictures of the universe!
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:iconmihowl:
mihowl Featured By Owner Mar 29, 2012  Hobbyist Traditional Artist
All of the things you're doing lately have been awesome.
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:iconbear48:
bear48 Featured By Owner Mar 29, 2012  Professional
sweet
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:iconparallel-pam:
parallel-pam Featured By Owner Mar 29, 2012   Photographer
now this is astonishing - the 7D can achieve that with a 600mm lens? Superb
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:icondigipainter:
DigiPainteR Featured By Owner Mar 29, 2012
awesome Kev . .
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:iconcapturingthenight:
CapturingTheNight Featured By Owner Mar 29, 2012  Hobbyist Photographer
Much more detail there now Kev :thumbsup: Can't wait to see what else you can get with that setup.
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:iconphotosbykev:
Photosbykev Featured By Owner Mar 29, 2012  Hobbyist Photographer
I'm surprised at the background noise level so I'm re-running the data sets without darks which I think are adding to the noise for some reason
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:iconcapturingthenight:
CapturingTheNight Featured By Owner Mar 29, 2012  Hobbyist Photographer
It could well be the cause. How many darks did you take in proportion to light frames (1:1, 1:2. 1:3 ???) I always try to do 1:1 but I have read somewhere that you should do 1:2, but I have never compared the difference.
The other thing it could be is sensor temperature during the night. It is starting to get pretty cold here in Australia so I am guessing it is getting warmer in the UK for you. I find that if the ambient temperature is too high (>15 degrees celsius) then the DSLR sensor heats up to much during the exposures leading to increased noise. I get my best images when the temps are down to just a few degrees either side of zero. It's why all the CCD imagers are internally cooled.
The other thing you could perhaps try is ditching one or two of the data sets. I would try a composition with just the 4 minute data and the 30 second data. Most M42s I have seen have a 4-6 minute set, a 30 second set and occasionally just a 5 second set. The extra 1 and 2 minute sets might be complicating the data. Are you stacking the four sets seperately and then layer masking them together in PS or are you letting DSS combine them all together?
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:iconphotosbykev:
Photosbykev Featured By Owner Mar 29, 2012  Hobbyist Photographer
I typically shoot 20 darks for each exposure/iso combination I use. I don't see any improvement beyond 20 so I stop there. These were shot with an ambient temp of around 0-1c and sensor temp 15-16c. At the moment, on this image, I seem to be getting less noise when I dump the darks, maybe it's just a bad set. I'm making a master FIT image for each exposure setand then run them all through PixInsight to balance, stretch and noise reduce before exporting them as Tifs into PS for blending.
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:icondavincipoppalag:
davincipoppalag Featured By Owner Mar 29, 2012  Hobbyist General Artist
fantastc
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