In article <3CACA971.1040304@xxxxxxxxxxx>,
Conrad Vogel <conrad@xxxxxxxxxxx> wrote:
> When I press the dof button and release it, the blades quickly close,
> but not nearly as quickly as my 1.8.
> Is this ok? Is there a possiblity of underexposure from the blades
> being ever so much slower to close & open back up?
I'd say overexposure was more likely - if the aperture hasn't fully
stopped down before the shutter fires, it will let more light through than
you wanted.
Put the lens on a body, point it at a light coloured wall or somesuch,
open the back and watch what happens when you fire the shutter at 1/60s or
slower. You should be able to see if the aperture closes all the way.
Compare it with the same trick but with the shutter on "B", when ,
presumably the aperture will certainly have had time to close to the stop
you've set.
--
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| / | |/-\ | Ian A. Nichols |
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| * i.a.nichols@xxxxxxxxxx |
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