SARTORIALIST QUESTION
Out of context: Reply #13
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- nb0
Seriously, though... the Sunny 16 Rule suggests that on a sunny day F/16 is the about the correct exposure for matching the reciprocal shutter speed with the ISO.
Assuming these are shot on sunny days:
ISO200, f16, 1/200s
which is equivalent to
ISO200, f2.8, 1/2000sIt looks like the image you posted was shot on either in direct sunlight or a slight overcast, which would easily explain the difference. Also, in the original image the shadows have been lightened, probably using Photoshop's "Shadows" or the Camera Raw "Fill Light" option.
If you shoot at f4, the equivalent shutter speed is 1/1000 at ISO200. If that's not fast enough, shoot at ISO400. You shouldn't notice much noise at ISO400 on a 7D.
One more thing: are you using flash? The flash you are using may have a maximum sync speed of 1/200s. If so, the camera won't allow you to shoot faster when the flash is being used.