Hi all
Went deep last night in the very good conditions.
Firstly the Omega Nebula.
7x10 minutes, ISO 400. Idas uv/ir and Baader UHC-S filters. Hutech Modded 350D camera. 10 inch f5.6 newtonian hand off axis guided.
Then the Helix. Did some experimenting here as the fiest part of the session was 5x10 minutes same settings as above, but then I tried some very long subexposures, did 3 lots of 30 minutes each! I also did a 30 minute dark to use with that set immediately afterwards. I procedded both sets separately, adjusted levels till they appeared similar then aligned and stacked them together. The result is here, total time of 140 minutes. Im glad I did this as I found it ins indeed better to stick with 10 minute subs. the 30 minute ones are of course brighter, but noise also increases. (Houghys cooled camera would be different, I reckon in that case the longer subs would be better)
Guided as above. Guiding for 1/2 hour continiously was a bit of a challenge but not too bad
All images prosessed as usual in Iris and Potoshop with resizing of jpegs by old but quick Paintshop Pro 4
Note here
http://www.vanderbilt.edu/exploratio...ix_nebula2.jpg
I picked up the Northeast Arc but also the fainter Northeast Object. (gee I wonder how that formed out there by itself)
Scott