I have a Nikon D3200. I noticed that shots I made with exposure times in seconds also take longer to write to the SD card *after the exposure is finished*. Images of dark scenes taken with a maximum exposure of 30 seconds take almost one more 30 extra seconds to save before the camera is ready to take another picture. I don't understand it – shouldn't the CCD be in about the same state after the mirror jumps back regardless of how long it had been opened before? Is the camera post-processing anything?
>>> Why does it take longer to my DSLR to read out a long exposure image from the CCD?