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heartyfisher, have you ever really tested what you're recommending? This is only a question, not a complaint.As noise can will be an issue, I wonder what generates more or worse to remove noise artefacts: Long exposure, which is also generating noise over a long time and adds this to the information or higher sensitivity, like 400 or 800 ISO, which will generate noise as well but in summary less than longtime exposure?One second exposure time at 800 ISO is equivalent to 8 seconds at 100 ISO - doesn't look much of a difference, but 4 seconds at 800 ISO mean 30 secs. at 100 ISO. Still only 8 times more time, in total 26 seconds more time to heat up the sensor. More heat = more noise. So, by trying to do the best (low ISO) you get a disadvantage.
@heartyfisher I only use manual or aperture.. I don't use auto...Well at least now I know; ill do longer shutter speeds, thanks everyone
@JJ_SO - you dont see the Exif? Click on the bridge image and look halfway down the page on the right.Funny how you can see noise that I can't but you can't see Exif data that I can.... :-?