Originally posted by digital diva Thanks for the reply Tracy. I held each exposure with the lens cap on between 8 to 10 seconds. None of the black shots show any white dots, only when shooting against a blue sky, background, etc. I also just blew dust off the CCD and tried again, but the dots are still there and in the same place.
Hi again!
Because I'm interested in astrophotography, one of the first things I did when I got each of my DS bodies is to run a hot pixel test on them using a program you can get here:
http://www.starzen.com/imaging/deadpixeltest.htm
I turned ON (sorry, I previously said off but meant on) noise reduction, got into a completely dark room, put on the lens cap and the eyepiece cover (not the eyecup, the cover so it's completely covered) and did 30 second exposures at 200, 400, and 800 ISO. Try that. If the white dots are showing up in the exact same place everytime then it's most likely stuck/hot/dead pixels. This software will give you mappings to the exact coordinates of the pixels. Run several exposures at the same ISO so that you can rule out random noise problems.
I averaged no hot pixels at 200 and 400, and then around 3 at 800 and 44 at 3200. What's weird is that none showed up at 1600. It was a result I could live with and 'heal' with Photoshop.
I'm really sorry you're having these white dots. That's aggrevating to find in a relatively new camera, I know. If it's only 12 or so, I personally wouldn't worry and just fix them in post processing. But if it's really irritating you, you send the camera in for servicing. Then you'd be without a camera for a few weeks, though.