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Message: <blockquote data-quote="tdodd" data-source="post: 1195552" data-attributes="member: 55450">I did used to have a Weston something or other, courtesy of my dad, but never really used it and now I can't find it. I think the last time I saw it was maybe 20+ years ago. So I did a bit of digging on the internet, Googling for "Weston Master V calibration". From what I found it seems that (a) there is a "zero" adjustment screw on the back, so maybe that needs looking at; (b) there is a calibration service for them - so I guess they can go out of whack. Here's an example article - <a href="http://haardt.net/wmv.htm" target="_blank">http://haardt.net/wmv.htm</a> - and another - <a href="http://www.acecam.com/photography/719.html" target="_blank">http://www.acecam.com/photography/719.html</a>.Manual here - <a href="http://www.cameramanuals.org/flashes_meters/weston_master_v.pdf" target="_blank">http://www.cameramanuals.org/flashes_meters/weston_master_v.pdf</a> I guess the thing to do is point it at the sun, with the dome in place, on a clear, blue-sky day, and see how close the meter gets to "Sunny 16" readings. i.e. at f/16 and 100 ISO does it read off with a shutter speed of 1/100? If not, how far is it off and in which direction? If it says you need 1/50, for example, then it is going to give you a 1 stop overexposure. If it says 1/200 then it will give you a 1 stop underexposure. Once you know the offset from the Sunny 16 standard maybe you can dial in a permanent adjustment to the meter or simply remember that you need to add or subtract a bit of a stop one way or the other.</blockquote>

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