Work in progress : Faint Spiral Galaxy

[Catanonia]

NGC 6946 is about 10 million light years away and I had to open up the shutter for 15 minutes at a time to get enough photons onto the CCD chip of the camera.

My new canon EOS1000D (which i self modded) seems to cope extremely well with these long exposures. My old EOS350D suffered bad amp glow after 5 mins of exposure. The 1000D seems to be totally immune to it :)

Made up from

Skywatcher Evostar Pro ED120 Diamond refractor on EQ6 Pro Mount
Skywatcher ED80 Pro II Gold refractor as a guide scope with QHY5 guide cam and PHD software

About 1.5 hours in 15 min exposures with Baader IR modified EOS 1000D DSLR with Astronomik CSL clip filter.
Darks, flats and bias added.
A little bit of Noels actions and CS3 work.





Anyway here she is after 1.5 hours. Going to hopefully add a lot lot more data to this little target.

NGC 6946

[RobinSchouten]

Amazingly well shot! I'm a 1000D user myself, so this really is interesting for me! :D

[Celestron]

Great attempt on this galaxie . Got to ask tho . Why are the stars pinpoint to the upperleft hand corner and as you scan to the lower right hand corner it seems the stars are out of focus :shock: ??? Whats causing this , did you stack a shot that was out of focus ??

[Catanonia]

Great attempt on this galaxie . Got to ask tho . Why are the stars pinpoint to the upperleft hand corner and as you scan to the lower right hand corner it seems the stars are out of focus :shock: ??? Whats causing this , did you stack a shot that was out of focus ??


yeah possible, not really noticed it as work in progress and didn't pay too much attention to detail.

Will double check this when I get more data and process properly. Probably a dud shot in the stack somewhere.

cat

[MidnightSun]

Nice one.....

[Adrena1in]

Nice capture, 15-minute exposures is pretty incredible!!

The blurring in the bottom right could be, I'm guessing, from a couple of things. Perhaps the CLS filter wasn't clipped in perfectly flat. I'm sure it's happened to me before where half the image was blurry and the other half was okay. Or could it possibly be due to the camera sensor not being perfectly parallel to the objective lens? Again, this has happened to me when I've been using some long barlows and/or camera adapters. Extending the camera way back on these long, thing adapters caused the weight of the camera to bend the image train down slightly, tilting the sensor and causing half to be blurred and half to be in focus. Probably not the case with you.

Best check all your subs and see if they're all like it.

[FatCat0]

Could also be the motion of the sky. No idea which direction this was oriented in, but over an hour and a half the stars move considerably, and moreso when they're above the equator than when they're above one of the poles. Again, this might not be the issue as I have no idea what your setup was, but it's something to consider.