Brain wasnt workin on the night. Couldnt get focus to start with, guiding was giving me troubles, etc..
In the end I shocked myself with thinking I'd taken shorter exposures and used a lower ISO setting.
Definitely going to attack this one in darker skies.
Thanks for your encouraging comments gents!
I was very suprised that 6min ISO1600 didnt produce too much noise on the night, whereas it has before(but that was a long time ago). More to learn and more practice needed.
The night was quite cool ~ 13-15 Celsius.
Hope to image M83 some more and stack more data.
I think what saved you on the noise issue was the fact that you got quite a few subs, and even more darks... Proper calibration/reduction via darks/bias/flats is the key to great images.. Something that I unfortunately took a very long time to learn... I never used calibration frames for so long, and now I always wonder how much better the images could have been with use of good data reduction..
I look forward to seeing you add some more data to this shot! should be a ripper!
Yeah, the additional darks removed 'alot' of noise. There was still a bit of vignetting around the galaxy that made it hard to adjust curves and levels; not sure how to tackle that part as yet.
Good effort ... the only thing I would comment is the dust lanes in the spiral are jet black in your image when I think they have a fair bit of red in them for the most part ( based on images of other astrophotographers, my own included ) so this may be from your processing when compensating for LP.
should be a ripper!
