----- Original Message ----- From: "Tomek Machnik"
Subject: Re: Noise reduction
Of course, but the dark frame has to be taken in the same environment, so there is little timesaving in it. Unless a single dark frame indeed can be used for noise reduction of different shots, as Jostein suggests. But I have not heard of any raw processor nor a PS plugin that does it this way (maybe I don't know of some specialist astrophotography tools that could be used for "this-earth" pictures).
I have noted that in long exposures, I get consistent pattern of hot pixels. It's not randomly generated noise, it's the same from frame to frame. Anyway, it's something that is easily tried, at some point, when I have the time, I'll see if I can make anything of it and report back.
William Robb
