I bought a used Horseman exposure meter and was able to find a battery for it, b ut I'm confused about the meaning of "FSV" (full scale value? something else?) and what the indicated shutter speed corresponds to in the context of aperture.
I don't have the manual, but I gather that I'm supposed to set the ISO, take an FSV reading and use the dial to translate this to a shutter speed. But what ape rture does this correspond to? How / when do I use the zero adjust control.
Many thanks. This is my last resort as I can't find any data online.