Ok, here's my doubt. Suppose I want to get a certain exposure for an image. Keeping the ISO constant, there are two tentative possibilities here:
- Put the camera at f 1.4 (say) and at 1/1600 shutter speed (suppose).
- Put aperture at f 8.0 (say) and shutter speed at 1/50 (suppose).
Both would get me the exact same exposure. Yes, for the latter, I may have to use a tripod. But the question being, what would be the difference in the image thus obtained? I can fairly interchange the settings for the same shot (theoretically). Or can't I?