Daniel Goodale-Porter , Mar 28, 2010; 09:45 p.m.
If you have a One Step 600, you have the correct film. If you have a camera called One Step (without the 600) you have the wrong film. That camera requires SX-70 film. However, you can fit the 600 film into a SX-70 camera by cutting off the nubs on one side if the film pack. But, the film sensativity will be incorrect. The 600 film is 640 ASA, while SX-70 film is 150 ASA. So the 640 ASA film will only work if you put a filter that attenuates about 2 stops worth of light in front of the lens.