On Wednesday it was near full Moon and the sky was nice and clear so I cooled down the system and did some short exposures. Just to see what I could get. I also wanted to see if forty stacked exposures had less noise. Especially the short ones ie less than 60s.
With a full Moon a sixty second exposure would be mainly saturated.
Details. Canon 5DH, Canon 300mm F2.8L at f/3.5, Hutech LPR filter, fridge at -8.0C. Usual HDR method.
Exposures 40x(7s, 15s and 30s) at 1600 ISO.
Large Image here 8.3MB
http://d1355990.i49.quadrahosting.co...cruxshort2.jpg
There was a bit of a bad gradient mainly due to the Moon. The lens shade extension seems to help. I had no chance to get some data without it as the sky filled with mist. I can't even win on a night with a full Moon!
Forty short exposures have far less noise than twenty.
Bert
