I took this picture the other day and of course not satisfied with the subject being so underexposed.
If I used flash (off-camera with bounce card, perhaps), I imagine, that poster would reflect a lot of light. This will lead to still lack of balance in light between person under hat and poster/surroundings.
Is there way to balance light in this situation using flash, or post-processing (some form of high dynamic ratio, I guess) using masks is the only way to go here?
Answer
A flash with a very narrow snoot should do the job, assuming you can get a proper exposure of the ambient light at the camera's flash sync speed.
A reflector would also help. Adding the same amount of light to the dark face and the bright poster will not increase the brightness of each by the same proportion.
Imagine that the face and the poster are 60 inch deep water barrels. The face has 2 inches of water at the bottom. The poster has 50 inches of water in it. If you add 5 inches of water to each barrel, you'll increase the one with 2 inches to 7 inches, a gain of 250%. That's two and one-half stops brighter than before! Adding 5 inches on top of the 50 inches in the other barrel is only a 10% increase in brightness, which is less than one-sixth stop.
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