View Full Version : Long Exposures on 300D

03-11-2005, 08:33 AM
I tried my first really long exposure on the 300D last night. From my backyard I pointed at the sky with a little bit of a neighbor's house in the frame. I left the shutter open for ~30 minutes (via a home-made wired shutter release) using manual mode with the kit lens set at F22. I was set for ISO 100 and fine JPEG compression. The exposure came out good with nice long star trails but the whole frame is covered with speckles that are like 50% bright with a few hideous tiny X patterns. (I don't have the file with me, maybe I can add it later if needed.)

Am I expecting too much from this camera? Do I have to do "black frame subtraction" myself? Would RAW mode magically fix it? Am I doing something else wrong?

Thanks for any help you can provide --tif