Cliffy The Weston Master 2 has no I.S.O. speeds ! it's only calibrated in Weston speeds which was their own way of rating film although you can get a conversion chart this is a very old meter from the 1940s. I f you buy a Weston buy a IV, V, or a Euro-master they are cheap enough these days, and make sure you get the Invercone incidental light attachment with it.
Originally Posted by Cliffy13