This exercise helps to understand the "S" from the FAST formula. In the first shot, I set the Aperture to 4.0 and adjusted the shutter speet to a level I liked. I then shot with a decreasing ISO....A HA!!! I get it!!! The shot darkens!!! If I would want to "correct" it, I'd have to change my shutter speed. I also used the 10 second timer (my camera does not have a 2 second one) to adjust for shake of camera with shutter button depression.
Manual Mode - Aperture 4.0, Shutter Speed 1/500s, ISO 1600
Manual Mode - Aperture 4.0, Shutter Speed 1/500s, ISO 800
Manual Mode - Aperture 4.0, Shutter Speed 1/500s, ISO 400
Manual Mode - Aperture 4.0, Shutter Speed 1/500s, ISO 200
Manual Mode - Aperture 4.0, Shutter Speed 1/500s, ISO 100
