I am trying to get my aged OM-1n up to speed, and everything is ok except the metering. I purchased a MR-9 adapter to allow it to use 1.5v cells. Measuring the voltage with the adapter in the camera it is still too high and hence the meter is off. The instructions with the adapter say it needs a 10k resistance to give enough current draw to regulate. Measuring the resistance of the camera it's around 15k, testing the adapter with a 15k load sure enough shows that the voltage isn't being dropped sufficiently.
My question is whether the internal resistance of my OM-1 is higher than normal? Does anyone have a OM-1 that they can remove the battery and measure the internal resistance? This would be very good to know before I delve deeper into what might be the issue.
I did check that both CdS cells are functioning and the meter works but is around 2 stops off which corresponds to the metering just seeing too high a voltage.
My question is whether the internal resistance of my OM-1 is higher than normal? Does anyone have a OM-1 that they can remove the battery and measure the internal resistance? This would be very good to know before I delve deeper into what might be the issue.
I did check that both CdS cells are functioning and the meter works but is around 2 stops off which corresponds to the metering just seeing too high a voltage.