Could not resist as a test. Sorry!
Canon 5DH, 100ED at f/7.65 and FL 765mm. Hutech LPR filter.
Exposures 20X(1m, 2m ) and 14x4m at 1600ISO. Fridge at -5C. Usual HDR method.
Large image 8MB
http://d1355990.i49.quadrahosting.co...1/car100ed.jpg
The poor fridge just made it to -5C as it was a hot night. Noise is not as much of a problem with a bright target as Carina neb. The dark dust is visible even though exposures were to short to record them adequately.
Eta Carina has brightened from 6 to 5 recently.
Bert