Originally Posted by MidEngine4Life
Yea in its raw large size before i resized it there were a lot more visible. Im using an Olympus E-500. I was using the setting that lets me select the shutter speed and it compensates for the rest. Set it at the max of 60 seconds.
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OK
what is happening with long expsoures is the CCD ends up heating up, and more pixels become "hot" and expose in misc colors.
60 seconds is a LOT of expsure time. Tolerences change in mfr. spec with the more exposure time you have there is less mfr. spec for hot pixels... i hope that makes sense.
that said, the number is pretty outrageous IMO... seems you aren't the only guy with this issue
http://photo.net/olympus-camera-forum/00LYDX
In my canon, there is an option for "color noise reduction" on long exposure. It's already so low that I don't have this set on, even in bulb shots of 200 seconds (i've only done that a few times) ... where basically the software compares the noise in a normal exposed shot compared to the long exposure, and eliminates most of the hot pixels that would form.
so a bit of PS will solve your issue... but unfortunatley, it does seem normal