Archived posting to the Leica Users Group, 1999/02/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>Osterloh in his Leica M book compares the M5 and M6 metering systems. >Accordingly,and here I copy his Table from p. 41: > M6 >M5 > >Diameter of measuring spot 12mm 8.5mm > >Measuring range(cd/m^2) 0.25-32000 0.06-32000 > >Exposure values > 1--18 -1--18 > > >Clearly, the CdS meter of the M5 is more sensitive than that of the M6. Are these measured with an f2 lens? The M6 officially measures to EV-1 with the Noctilux and 100 ASA film (ie 0.06cd/m^2) though I find the meter to be more sensitive in practice. Because it is a TTL meter, I think that it is more informative to quote ASA and shutter speed. So you would quote the M6's sensitivity as 1/2 sec with 100 ASA film. The f-stop doesn't matter, so the EV is meaningless. Does anyone agree with me? Does anyone see what I am trying to get at? Regards, Malcolm