Except the last two shots from yesterday. I have an RB67, and am using a newer 120 back that I got a while ago. Since then, I've run through 2 other rolls of film with no worries. I developed this roll today, and the film came out clear except for the last two images shot yesterday. The rebate shows the frame numbers as well. I "Think" it might be the lens I was using. I usually shoot with my 50mm, but I did have my 180 on it for "some" or all of the others. Can't really remember. Think it's that lens? How can I test it? Found my answer. I put the lens on 1 second, and it never sounded like my 50 does when shooting at 1 second. Not sure if there is anything I can do with the lens to be honest though.