So, what's the "big picture"? That is, can you use ISO 6400? How about ISO 12800? Well, here are the "full-sized" pics (that is, shrunken down to little Web pics), again with ISO 100, then 1600, 3200, and 6400 after "full" (that is as much as I felt like doing in a few minutes while drinking my morning coffee) processing. As I already knew, ISO 1600 is quite impressive, ISO 3200 is very useable in a pinch (but not for big enlargements) and ISO 6400 is, well, there...in case you are desperate!!!