I just got my 120 film back from NCPS and found only 2 of 23 exposures came out. It had been a long time since I used my Rolleiflex 3.5F and I had the lever on the top left turned to flashbulb ( 1/30 sec ) instead of the electronic setting for the speedlight that I was using. It makes me feel really dumb after spending $ 37 on developing and scanning to see the results. I have no idea why two of the pictures even came out. The other 21 are underexposed enough to not be fixed. It goes to show that it is good to read your instruction manual before shooting. I had a copy with me in my camera bag too.