I have replaced my imaging camera with QHY600m and OAGL. My auxiliary guide scope just can't tame the system flexes at 2000mm focal length. This is my first serious project with the new CMOS camera QHY600M with total 28 hours of exposure time between 4/9 and 4/16/2021.
With 2X2 binning on LRGB channels, the image scale is about 0.76"/pixel. The local seeing at my remote observatory B.R.O. ranged between 1-2 arc seconds over these nights, and the RMS guiding errors is about 0.8" with my old faithful AP 900GTO and PEC on. My imaging configuration is a bit oversampled. 3X3bining would be more ideal, but the option is not available with this camera. Overall I am quite pleased with this camera. The noise level is very low and the sub frames are very clean.
L: 600s X 24; 1200s X 31
R: 600s X 26
G: 600s X 27
B: 600s X 29
28 hours of total exposure time.
Imaging Scope: AG Optical 12.5 In iDK at F6.7
Mount: AP 900 GTO CP4
Location: Mariposa, CA
The images are processed in Pixinsight. Most post processes are focused on the galaxy with spiral structures. I tried to leave the elliptical galaxies alone. Deconvolution and other contrast enhancing tools seem to create unwanted artifacts around the diffused galaxies. I did "cheat" a little when I masked the spiral galaxies. I used range selection first, then binarized the mask, and then manually removed the masking for elliptical galaxies by using clone stamps, and finally ran a convolution to softened the edges of the mask. I couldn't think of a way to selectively mask spiral galaxy only.
Here is the link to the full image:
Edited by ub0423, 17 April 2021 - 01:15 AM.