thanks dave....didn't some of the other cameras use the ae-l button
for the same purpose?

regards, subash

On 9/14/06, David Savage <[EMAIL PROTECTED]> wrote:

> >another query. seeing the dpreview preview of the k10d, which says,
> >"The K10D has a KAF2 bayonet lens mount which can take lenses with a
> >KAF2, KAF or KA mount lenses, it also provides an option to use the
> >lens aperture ring", would the K lenses be compatible with the K10D.
>
>
> Yes, but you have to use stop down metering.
>
> Because K & M lenses don't have an setting "A" on the aperture ring & the
> current line of bodes don't have the aperture stimulator lever thingy,
> there is no communication between the body and the lens as to what the
> lenses aperture is set to.
>
> The way Pentax have got around this is to use the "green button". When you
> need to take a meter reading with a K or M lens you press this button and
> the camera stops down the lens & takes the reading. It sounds awkward, but
> isn't that much of a hassel.

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