Gengh said:You'd do that if you want to shoot a silhouette with a nicely exposed sunset in the background (for example). Need to meter on the sky, but focus on the silhouette. Something like this:
If the camera tried to meter to retain some details in the silhouette (the subject in focus), the sky would be blown out, or at least overexposed and the mood would be completely different.
Thanks that's a super example! Just out of curiosity, do u think you would have gotten this if u had set it to evaluative metering?