I second Henry's observation. My feeling is that the 'different iso' statement is a bit of nonsense. What it means is that you can over and underexpose the film a bit and still get decent prints. Well, since this is really a color negative films, it means that [1] you get better results if you overexpose a bit, hence the recommended 320, and yes, [2] you can underexpose a bit and still get manageable negatives, but I would not push that too far.(posted 8247 days ago)chris