> being used, say K50 1.4 into the body UI when you powered up the camera.
> All they would need would be the actual non-linear response of the
> aperture linkage (which would be in a table in the firmware) and they
> could close down the aperture to the correct position as dialed in by
> the user on the body. The user would have to set the lens to f22 or
> whatever the min on the lens is, effectively mimicing the "A" setting.
> Knowing exactly what lens is mounted would be used not only for the
> aperture response, but the focal length for SR, the wide open aperture,
> and possibly even used for multi-segment metering.
>
You could do something like it, but it would be a little kludgy:
- Mount K/M lens on camera
- Dial in the max aperture into the camera (e.g. '1.4' for 50/1.4)
- Move aperture ring to desired aperture (e.g. 'f/8')
- Match in-camera shooting aperture to aperture ring ('8.0')
Then it would be equivalent to Av mode on an 'A' lens. You'd just
have to remember to change the in-body set aperture with the aperture ring
if you changed that.
To me that would be an improvement that could be added in addition
to the 'green-button' kludge. It has the advantage of allowing
multi-segment metering, allows for changing light conditions, etc.
... still much easier to put the $5 part back in of course...
-Cory
--
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
*************************************************************************
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