They only control is whether to use flash or not, much like 'toy' cameras. Somewhere around f/11, if I remember correctly. They are recycled, the lab I used to work at would get upwards of 30c each, although I imagine they're not worth as much now. If you see the 'store brand' and it's wrapped in a paper carton looking just a tad bulky, it's probably a Kodak or Fujifilm which has been reloaded and taped up. At soe