View Full Version : Ngc 7331

2011-Oct-11, 04:05 AM
I am reasonably happy with the results here, aside from the field curvature.

This is NGC 7331 in Pegasus. 1 hour, 50 minutes LRGB (50:20:20:20 | 10:6:6:6) with the color binned 2x2. ST-10 on a C-11 @ f6.3. Captured with Maxim DL and CCDCommander, reduction and processing in PixInsight with minor touch-up at the end with Photoshop. The video tutorial (http://pixinsight.com/videos/NGC1808LRGB-vperis/en.html) on the PixInsight web site is excellent.

Thanks for looking. Click on the Link below to get to a larger version.

http://obsballona.net/coppermine/albums/userpics/10002/normal_NGC-7331-110924-LRGB-04NR.jpg (http://obsballona.net/coppermine/displayimage.php?pid=215)

Clear skies,


2011-Oct-11, 10:24 AM
Nice what caused the flaring on the stars ???

2011-Oct-12, 01:16 AM
There are two causes to the flaring. The regular spikes on top of and below the stars are caused by the micro lenses on the ST-10. They increase the camera's sensitivity. The blotchy flares and strangely shaped stars in the corners are from the optics. I am imaging with a C-11 at f6.3. It's not a flat field and it also tends to stretch the colors slightly differently so that causes color in the halos.

Thanks for looking!