Just thinking of something,
If you put your M50 f1.7 on your MZ-50, for more then just one occasional
shot, you could do the following:
Manually select an ISO speed of 2 and 2/3 stops lower then reality (ISO16
for and ISO100film, ISO 32 for a 200film, etc..)
With the camera on manual, the light meter will now show you which diaphragm
to select. The middle of the meter range will be f4.0, one higher f5.6, one
lower f2.8 etc, all the way from f1.4(which you don't have) to f11,
including the half stops.
Should work fairly quick, withouth calculations.
There is a theoretical 1/6 stop overexposure, but that should'nt have a
visible influence on the result. If you think your camera has a tendency to
overexpose anyway, lower ISO speed by 2 and 1/3 stop, that will give a
theoretical underexposure of 1/6 stop.
It's not real easy, because if you would have several manual lenses, you
would have to change ISO everytime you change lens, f.i. for a f2.8, lens
ISO would have to be lowered 1 stop to keep f4 in the midle, and if you
mount an automatic lens in between, you shouldn't forget to put ISO back to
nominal.
Just an idea,
Erwin
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