Do the laws of conventional physics not exist on my M6?

[ddimaria]

I have read in many places, and just now on this forum, about how you cannot mount a Jupiter 12 on a Leica M6 and get an accurate light meter reading. I am a bit puzzled because I have tried just that and get the same meter readings (within 1/2 stop) as when I mount a 35/2 summicron. Anyone else use the J12? Have similar experience?

[jdos2]

I've heard it changes the metering pattern some.

Perhaps you are lucky? There are several versions of the J-12 with a few even working on the CV cameras- meaning that it is somewhat shorter, perhaps you got one of those?

Nice lens.

[rover]

Or, maybe there is something wrong with your Summicon :) (I wish I knew how to make a devil smiley).

[Brian Sweeney]

Many people consider 1/2 stop too far off? If shooting old style slide film, that would have been pushing it.

[ddimaria]

You know I blamed the lenses for a while, now I realize it's just the people that I'm taking pictures of who are ruining the photos. (Insert Devil Smiley)

[kafir2]

well, it seems no big problem here since the light meter of the M6 is so poor that is nealry as useful as a Leicameter MR (although better integrated in the camera).
It is probably a situation where some internal cam of the lens partially covers that sensor, it might also depend on where the lens is focused even if I am not familiar with the internal construction of that lens.
ciao
k

[Roman]

It is probably a situation where some internal cam of the lens partially covers that sensor, it might also depend on where the lens is focused even if I am not familiar with the internal construction of that lens.
ciao
k

You might be right, but it's not a cam but the huge chunk of glass that forms the rear element that might be covering the metering cell if focussed at infinity; at least with my Bessa R, it made a difference with regard to mounting it: at infinity it is impossible, close-focussed it works.

Roman