Well even my basic bare bones manuel slr has a TTL/Center weighted light meter built in. Inside the view finder the light meter will blink when the light meter thinks the exposure is wrong and I either stop down/up on the aperture or shutter. With the digicam in the viewfinder (i never use that stupid little lcd screen either) as I change either the aperture or shutter speed I can see the actual effect the changes have made, and decide if I want to keep them or not.

I am, therefore I create.......
--- michelleamarante.com