Quote Originally Posted by Tannin View Post
If you think about it, only two ways of changing exposure are possible.

First, it helps to conceptualise exposure as a graph of light levels, dark on the left-hand side, bright on the right-hand side. A line upwards to the right. Only two adjustments are possible.

(a) You can push the whole exposure line up or down. (Simply turning up the brightness overall.)

(b) You can change the slope of the line. (Changing the contrast.)

Everything else - all those complex and subtle adjustments photo-editing software can do - are essentially just combinations of those two basic actions.

(You may add (c) changing the shape of the line if you wish; or you may prefer to think of that as simply an advanced form of (b). Either visualisation is correct, use whichever one you like.)

Yes, and understanding it properly means I can choose the best way, and not feel I am doing it incorrectly.. Thanks