Wayne wrote:
> It would be interesting to know what the actual current levels are. I
> assume to get the long exposure, the light metering is being
> integrated. I have a used OM-4T that will only time for 12 seconds with
> the cap on, while my newer OM-4Ti will do close to 4 minutes. I suspect
> leakage to be a problem. If it is being integrated, is there an analog
> integrator? Does anyone know what the internal circuitry is?
Have a look at
http://www.patents.ibm.com/details?pn=US04618238__&language=en
for details on the OM4
(for more enlightenment search for 'maitani' under Inventors)
duncan
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