Brady in Seattle asks:
For the Enfuse process, Simon Maxwell suggests using the lowest ISO possible and I translate that to ISO 100 for Canon users and ISO 200 for NIKON users (at least my D700) ... but where my question comes from is when doing more ambient/flash work. Scott Hargis recommends an ISO of 320 to "give your flash more power" and I presume 320 because it's a multiple of the Canon native ISO, 160? For my D700, its native ISO is 200. Would I be best shooting at ISO 400? Probably overthinking it for the quality levels of the MLS, but I'm curious for shooting in general.
Yes, Scott's recommendation for ISO is explained in footnote 13 on page 19 in his book:
13 Little-known fact: the “native” ISO on Canon cameras is actually 160, which means that you’ll get better quality at 160 than you will at 100. Not only that, but your camera will perform better at multiples of 160 as you move up the scale. You’re better off at ISO 640 than you are at 500! Nikon’s “native” ISO varies from model to model, generally between 100 and 200.
Here is an article that covers the same issue.
I think you are right, the native ISO is 200 for Nikon but there seems to be less info about this on the net that there is about Canon.