Ok, so I go shoot some 4x5s today, after I loaded 10 film holders with what appeared to be 50ASA from a new box of 100 sheets. I go through these, metering at 50ASA and then I reload the holders (I have a changing bag). When I put back the film box into the cooler I see that it is 50 sheets of 100ASA!!! Well, there you go... Dyslexia at its best.:er: :x Well, at least I shot the rest at 100ASA.