I have a question about fast lenses, I hope I can make it clear.
Okay, here's my example, i don't know how else to get my question out:
2 identical cameras with identical tripods, settings, subjects, everything.
One has a 70-200 f/4, the other a 70-200 f/2.8. Both expose for the same subject.
If the Aperture Priority is set, say at an f/11, with both lenses register the same shutter speed? Or will the faster lense register a faster shutter, since more light gets in at the same aperture?
Or the reverse, if the Shutter Priority on both cameras is set to say a 1/200, will the faster lense have a f/11 while the slower lense an f/5.6?
I hope I am being clear. Basically I am asking, if the speed of a lense is faster at the wide open end, does that mean that its faster at each respective, comparative shutter or aperture value? Or does the faster lense just go faster on the bottom end? I hope this makes some sense.