Archived posting to the Leica Users Group, 1996/08/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>From: "C.M. Fortunko" <fortunko@boulder.nist.gov> > >Frankly, I do not believe that any of the cameras using only a single >mercury cell (SL, SL2, and M5) can be regulated. This is because there is >not enough voltage to make a transistor work. I assume that the CL has a >similar meter circuit to the M5, although it was made by Minolta. For making the compensation work, it is enough, if there is one element in the circuit that is not linear. It may be a diode or a non-linear resistance such as a light dependent resistor. Effectiveness of the compensation is achieved both with the type of components used and with correct design. There are tradeoffs to make between meter accuracy, simple design, power consumption, meter sensitivity, supply voltage and resistance to battery wear. I suppose the MR meter is a combination of simple components and clever design. I'm waiting for your test results with great interest. Best regards, Pasi Ohtonen