This is 90 minutes of lum all 10 min subs 1x1 bining, and 35 minutes of RGB all 5 minute subs at 2x2 bining. Taken through W/O Flt 110 and QHY-9 at -20c. Guided using PHD and stacked using DSS and procesed in Photoshop.
I am also almost certain that when I looked at my setting the gain was on zero and offset on 112. I normally have it on 12 and 112.
Nice Mark. Its a beautiful object and great rendition.
I don't think having your gain on zero would have hurt. Others may correct, but I believe the gain setting just "spreads out" the spectrum of values your CCD can record between 0 and full well depth. For example, if your sensor "fills up" at a 16bit value of 37,000, then by increasing the gain you get might spread the values out a bit further to say between 0 and 50,000. As long as you don't push the upper limit past 65,535 you don't lose anything and you spread the data over the available 16bit bandwidth a bit more.
On the other hand, "spreading" the data across the useable spectrum of values is what you're effectively doing in PS when you stretch.
Some people actually vow and declare gain of 0 is best to keep noise down. I normally run on 10/110 with my QHY9 for what its worth.
I took this at Queensland Astrofest which is held near Linville 2hours inland from sunshine coast. It is very dark. I took the same shot the year before using a canon 400d and think maybe it is a better shot. Here it is. I'll try boosting the saturation.
You don't see many Veils imaged from Australia. It must be fairly low even above Brisbane.
Nicely done although it looks like it could do with a bit more colour saturation. Was there light pollution?
Greg.
Gets to 41 degrees above the horizon from my place....that'd be down to 33 above from Brisbane. Main reason why you don't get many piccies is the quality of seeing. For most of the time it's up, the humidity ruins the views...too cloudy/hazy. Winter this year hasn't been much chop. Normally we get cool clear nights with little or no haze or cloud. Seems things have decided to change.
Lol the Canon shot looks heaps better
The blue Neb has suffered in the QHY9 shot.
I alway's get a longer exposure for the blue channel so it is a bit compensated in the color department.
