LewisM
18-10-2012, 11:17 AM
Well, I got all my polar alignment (I use a stock standard NEQ6), focus, guiding etc procedures nailed.
5 minutes subs seemed never enough, so tried a 10 minute exposure. PERFECT, no trails, no elongation.
So, I tried 20 minute single subs. SAME! Perfect (well, close).
So, my first SINGLE 20 minute sub was on the Alnitak region - the Flame and the Horsehead, plus the nebulosity around.
This is an UNPROCESSED image except to crop it, increase the levels a LITTLE (then dropping curves some). No colour play,no denoising (yet), no stretch. Canon 5DMkII, stock-standard, no cooling (CMOS temp was 30° after this shot), with Canon internal NR on, and using my customised profile with full image sharpen etc. ISO 600, 20 minutes SINGLE exposure. Skywatcher ED100 (reduced to f/7.2), with an ED80 guiding via an Orion StarShoot, with a 0.5s refresh rate.
Got some cleaning up to do, and may add in one sub-frame of a 5 minute sub so as to rid the Alnitak etc over-flare, but darned well getting better!
I have included a 100% size cropped shot of Eta Carinae nebula I also did, but that is a single 10 minute sub. Also unprocessed as yet.
Horsehead: http://img32.imageshack.us/img32/2558/horse1e.png
Eta Carinae Nebula: http://img7.imageshack.us/img7/2531/closeupcore.png
(all png, so don't do them justice yet!)
Now, how about 20 x 20' subs, stacked? :thumbsup:
5 minutes subs seemed never enough, so tried a 10 minute exposure. PERFECT, no trails, no elongation.
So, I tried 20 minute single subs. SAME! Perfect (well, close).
So, my first SINGLE 20 minute sub was on the Alnitak region - the Flame and the Horsehead, plus the nebulosity around.
This is an UNPROCESSED image except to crop it, increase the levels a LITTLE (then dropping curves some). No colour play,no denoising (yet), no stretch. Canon 5DMkII, stock-standard, no cooling (CMOS temp was 30° after this shot), with Canon internal NR on, and using my customised profile with full image sharpen etc. ISO 600, 20 minutes SINGLE exposure. Skywatcher ED100 (reduced to f/7.2), with an ED80 guiding via an Orion StarShoot, with a 0.5s refresh rate.
Got some cleaning up to do, and may add in one sub-frame of a 5 minute sub so as to rid the Alnitak etc over-flare, but darned well getting better!
I have included a 100% size cropped shot of Eta Carinae nebula I also did, but that is a single 10 minute sub. Also unprocessed as yet.
Horsehead: http://img32.imageshack.us/img32/2558/horse1e.png
Eta Carinae Nebula: http://img7.imageshack.us/img7/2531/closeupcore.png
(all png, so don't do them justice yet!)
Now, how about 20 x 20' subs, stacked? :thumbsup: