The last couple of days have been a blur as I've done lesson plans and taken a lot of (mostly bad) photos for our school photography class. I volunteered to come in for each of 3 days to talk about the elements of exposure: ISO, Aperture, and Shutter Speed. Yesterday was ISO and I think I bored even myself. I did show them some dramatic changes in photos when you keep all else constant but change the ISO. The problem is, all of them have point and shoot cameras, which pretty much take all the guesswork out of ISO. I took our two P&S cameras and did a series with each, adjusting the ISO over and over. Each time the camera "fixed my idiocy" by compensating and turning out a properly exposed photo. And now I fly back to work. Have a great day!