Quote Originally Posted by kkraczek
I'm counting them exactly the way they were taken, since my Canon counts from 24 down to one.
When you say my camera "counts", I assume you mean either a small frame number window (film) or LCD display (digital).

In any event, your actual shots would be recorded in ACCENDING order. Rolls of film all start at number one, and digital file names (depending on how your camera's set) start at either number one or continue from the last file number shot. With both, the number increases as you shoot.

Bottom line is you are right about exposure. With a constant aperture, the higher the shutter speed, the less exposure an image gets.