On Apr 11, 2005, at 8:39 AM, Cory Papenfuss wrote:
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.
Whether it is a restriction due to a firmware or hardware I couldn't answer, but it is the way the DS works. Only A, F, FA, DA and D-FA lenses support matrix metering, and only with aperture ring (if so fitted) set to "A". All other lens/body configurations support just the Spot and CW Averaging meter patterns.
Godfrey
