Hi Guys,
I've searched the web for a clear cut answer to this question but to no avail. I've just acquired a Minolta Flash Meter III but when it arrived it did not have a spherical diffuser over the sensor. I bought a spherical diffuse off ebay and fitted it to the Flash Meter and noticed that the little metal switch which is on the mounting face of the flash meter where the diffuser goes does not get presses. Pressing the switch seems to adjust the light reading by three stops.
Have I bought the wrong diffuse for the Flash Meter III, or should the switch NOT be presses for the dome, i.e. it's used for something else.
Many thanks
Philip