Long explanations that I won't get into, but I really need to use this camera because I can't get to another one til Monday and I have 2 rolls of film to take by Wednesday and no time in between those two days to do it. I know this takes "double exposures" but that just means when I take my film out, I'll have two of the same picture right? I can still make a single print that's not "3D." Other question is- I have ISO 400 film. But it looks like this camera can only go up to ISO 100? What happens? I was reading around and it looked like the film would get overexposed? Is this true? If so, is there a way to adjust the aperture and shutter speeds and exposure so that it compensates for the change in film speed? Please explain in the simplest way possible! :)