Question about Sekonic L-358 Flash Master Light Meter

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Meter is consistently a half to a full stop off

My Sekonic flash master L-358 consistently reads a half to a full stop off. What can I do to adjust it?

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I've known this problem to occur if the wrong kind of CR123/CR123A lithium battery is used. They come as rechargeable and dry cell (i.e. non-rechargeable) versions. For sensitive devices like yours the difference is important as the internal resistance of the rechargeables is lower which affects the voltage characteristics.This meter is designed only for the dry cell version: see page 34 of the user manual, although the instructions don't make this fact clear enough IMHO. The reason for using the dry cell version is that the output voltage remains constant until the battery is nearly exhausted, but the rechargeable version starts at a slightly higher than nominally rated voltage and drifts down as the battery discharges. This means that you only get a truly accurate reading with a dry cell battery. There is no user adjustment to recalibrate the meter but you can use a different ISO rating to compensate or use the exposure compensation settings.

Posted on Jul 04, 2009


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