Another rare clear night managed to get a good set of data
This image taken with the Canon 5DH and Canon 300mm F2.8L at f/5. All at 400ISO.
Fridge at -10c, EQ6 guided with Guidemaster with dithering.
Exposures 20x (1 min, 2 min, 4 min, 8min). Hutech LPR filter. Sky was very clear.
Raw images corrected for flats and darks converted to 16 bit fits. Fits were then stretched and converted to 16 bit tiffs. These tiffs were then upsized by a factor of 1.5 (75MB to 160MB).
I started with the shortest exposure set and worked up from there. This has the effect of obtaining higher real resolution than that of a single frame. Registar was used to median stack these sets of exposures. EasyHDR to produce the final tone mapped image from these four exposure stacks.
Large image 7MB
http://d1355990.i49.quadrahosting.co.../IC4628_10.jpg
Lots of other objects visible. A bit of the Dark Tower is visible at center top.
Bert
