Originally posted by Marc Sabatella Anyhow, as to why the DS and K100D estimate remaining shots correctly: that's because they don't compress their RAW files, meaning they are always the same size.
Not quite the same size. In fact I've used the rise in size of dark frames to indicate the thermal noise from the sensor....
I just checked a 4000+ files. My K110D RAW Astrophotos range from 9,247 KB to 11837 KB. The smallest ones are darks taken on cold nights (Telescope or lens capped). Not much compression, especially since the photos are mostly black sky.
The camera estimates 186 photos on a 2 GB memory card. That comes to 10,700 KB each which is close to my average size.
JPEG estimates are all over the range. The camera estimates 689 but I once stopped my K100D at over 900 and it had room for more. I was using Trap Focus and there was more activity at the bird feeder than expected.