Alexander Krohe <[EMAIL PROTECTED]> wrote: >I am a bit confused about what is being discussed >here. In my understanding (which may be wrong of >course) the A-lenses' current circuit is only closed >when the lens is set to the "A"-position, i.e. when >the "A-contact" of the lens is protruded (as opposed >to F and FA lenses).
This much you have correct. >It is thus my understanding that multisegment metering >only works with A-lenses when they are set to the >A-position. This is where you've gone off track. The "A" contact has *nothing* to do with the metering mode. It's all the *other* contacts on the camera body that affect matrix metering (and "A" lenses will work with matrix metering no matter how you set the aperture ring). >Multisegment metering would only work in manual mode >with an A-lens or with an K/M lens if the camera's >lens mount is current carrying even if the "A-contact" >is not connected. Is this the case? No, matrix metering will work in autoexposure mode or manual and the "A" contact won't affect it. See the explanation on my web page. http://www.robertstech.com/matrix.htm -- Mark Roberts Photography and writing www.robertstech.com
