They did not "allow" for stop down metering with K mounts. They tried to stop that entirely. If you have to partially dismount a lens you are using the camera in a manor not supported by it. This is not to say you can't do it, just that your not supposed to.
At 05:44 PM 10/2/03 +1000, you wrote:
On Wed, 1 Oct 2003 18:02:50 -0400, J. C. O'Connell wrote:
>Cant you just use manual settings with M lenses >or does the camera have no lever to stop down >the lens during exposure? > >I sure would like a clarification of what >exactly it can and cannot do with K, M, >and adapted screwmount lenses....
The camera has a lever which stops down the lens during exposure, what it lacks is the lever which tells the camera what the lens is set to so that the exposure can be calculated by the camera. On a lens set to "A" this doesn't matter because the camera knows the range of apertures available and only closes the aperture part way. If the lens is moved off "A" the camera is again lost as to what the lens is set to and can't know how much it can actually close the aperture.
To allow for stop down metering - metering with the aperture closed - (by either using a screw mount lens and closing the aperture or half undoing a k mount lens) They have added the Pentax function to let you do it. They have made it a Pentax function and not a standard feature because if you don't understand it and use the wrong lens and blame the camera you won't want to buy any more wonderful Pentax products - If you know enough to turn it on you should know enough to make it work.
Hope this helps.
Leon
http://www.bluering.org.au http://www.bluering.org.au/leon
I drink to make other people interesting.
-- George Jean Nathan
