I just put an FA 50 f1.7 on my *ist-D, moved the aperture ring off the "A" position, and shot a test shot in manual using the green button for stop down metering. It uses CW metering in that circumstance, even though set to matrixed. Same lens set to the "A" position goes to matrixed metering..
I'd assume the camera is programmed to go to CW metering if the aperture ring is not in the "A" position - perhaps matrixed metering is not compatible with stopped down metering? Just a guess...
- MCC
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Mark Cassino Photography
Kalamazoo, MI
www.markcassino.com
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----- Original Message ----- From: "Cory Papenfuss" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, April 11, 2005 11:39 AM
Subject: K-lens Matrix metering on a -DS?
Hey all... I've been playing with some older lenses I've got with my *ist-DS, and I figured I'd try my hand at modifying a lens to have the electrical contacts. Basically, the same modification as outlined here:
http://www.robertstech.com/matrix.htm
After successful completion of drilling jigged divots, I still cannot get anything other than center-weighed metering. Upon further examination, it appears that even on an official KA lens with insulators, if the aperture ring is set to other than 'A', center-weighed metering is used. Looking through the manual, it says that multi-segment metering requires a 'A' lens or greater, but doesn't actually say it must be *set* to 'A'. Is this a limitation in the firmware on this model? Apparently on some bodies (like Mark's) it should be possible once the contacts are set to inform the camera what aperture ranges it can do.
-Cory
************************************************************************* * Cory Papenfuss * * Electrical Engineering candidate Ph.D. graduate student * * Virginia Polytechnic Institute and State University * *************************************************************************
