While enjoying my new camera I've come across something that suprised me a bit, its manual ISO setting ranges between 6 and 6400, is there actually 6400 ISO film? I've only ever seen 25 to 1600, so I can easily assume that 6 isn't that big of a stretch from 25, but, 6400 is quite a difference, and, another question about it if anyone has used it, how much of a quality drop is there between it and more 'typical' film speeds?