I’m using an ExpoDisc with my Digital Rebel to set the correct custom white balance.

Dan also pointed out to me the other day that you can use the ExpoDisc to calibrate your camera’s meter, too.  By leveraging the “Sunny f/16 rule,” you can just place the ExpoDisc on the lens, select an ISO of 100, place the camera in aperture (Tv) mode to select an aperture of f/16 and then aim at the sun.  If your exposure meter is calibrated properly, you should get a shutter speed of 1/125s.  If you don’t, then you know how much over or under you need to expose for a proper exposure.

I’m happy to report that after suspicions that my meter may not be calibrated properly, it is indeed calibrated properly.

You may be asking, “What is the sunny f/16 rule?”  It’s pretty simple, actually.  On a bright sunny day, shooting at ISO 100 with an aperture of f/16 and a shutter speed of 1/125, you will achieve a correct exposure.  I’ll expound on this in a future blog entry.