In article <31BFA54E.16B4@mse.mhs.compuserve.com>, dima@mse.mhs.compuserve.com says...

>Well, I've got a Nikon, so actually I know that Nikkors do have aperture
>rings. But these rings usually have click stops, and tend to not be settable
>to positions between them. OTOH come to think of it I never really tried. But
>I've got a question: if I manage to set the aperture to a position between
>two click stops on the lens, will the camera (its meter) know exactly the
>aperture value set, or will it still default to one of the nearby stops?

You are not alone with this question, basic as it seems to some of us - I
have been amazed to find even some photo writers assuming that only the
whole stops are selectable on Nikkor lenses, when ANY increment can be set
(and the meter will follow it, since the aperture pick-up on the body is
analogue [and continuously variable]). Go ahead and set f4 + 1/8th, or whatever else is required to get exactly the exposure you want.
Hope This Helps