This is really a test to see how well the camera is aligned. The top left and bottom right corners are about as good as it gets. The top right and bottom left corners tells me the camera has to be moved up a tad and to the right a tad. The movement in both cases needed is less than 0.1 mm about 0.06 mm or 60 micron. Without the ITS this would be impossible! It could also be a case of why bother.
Exposures. 18x4 min red,16x4min green and 6x4 min blue. As usual cloud stopped data collection.
Full res image here 8MB
http://d1355990.i49.quadrahosting.co...IC4628_RGB.jpg
Bert