Just got back from a wonderful trip to Yellowstone, but had a couple little snafus while there that I need some help resolving. I've been trying to get more into film, after rediscovering photography with a dSLR. Here's the problem: I love my F100 and F5, but I have this little habit of forgetting to check/set the ISO when I change film. For some reason (maybe because they are used), they don't always sense the DX encoding. I sometimes get excited and start shooting without double checking, as if it were a digital camera with instant "results." This happened twice, and I realized the problem most of the way through the roll. Instead of trying to "fix" it and only get a few "correct" exposures when I had it developed at the listed ISO rating, I just decided to let it ride and see what happened if I had the whole roll developed at the ISO that I shot at. The problem is, I'm having a hard time figuring out what to tell the lab in terms of "push/pull this roll by ___ stops." I've tried, but most of the information I've read about pushing or pulling is written in terms of doing it on purpose, which I have not done. I'm just trying to see what happens. So, could anyone be so kind as to help me with the instructions to the lab? Here's what I exposed: 1. One roll of Kodak BW400CN was exposed as if it were ISO 40. 2. One roll of Fuji Reala 100 was exposed as if it were ISO 40. And if anyone can offer any other options or possibilities for developing these two rolls, you are welcome to it. I guess given this has happened before, only having 2 screw ups out of 20 or so rolls isn't awful. Film has certainly made me a little more careful, but apparently not quite careful enough.