When shooting video with lens which nas an aperture ring or in live view the
camera seems to meters normally coz if you changing the ring the exposure
compesates immediately. So I have figured that you can shoot videos or doing live
view with an aperture ring, but what bothers me is that when I set the lovest F in
camera and go in to live view the actual F isn't that what I choosed in camera but is
f11 (sigma 105mm f2.8).
And I have discovered one other thing too, so if I set the F number for example at f8
and then I press the aperture preview button and if Iam looking from the other side
in the lens aperture and rotating the aperture ring while holding the preview button I
can see that that at f8 choosen by aperture ring is quite moore open than choosen
by camera, that matters for all f numbers not only for f8, but if I make the test shots
within all f numbers and exposure compensation to 0 all of the shots are fine.
Thanks, luka