I recently wrote an article as to why high Iso is not a solution. Below is an article tells how a photographer but the high Iso capability of his camera to good use. Truthfully it is not something I had ever given any consideration to because my mom and dad don’t let me out after dark.
Composition
Ultra high ISO with lots of noise… There’s a lot of buzz going around about the new Pentax KP with it’s maximum ISO of 819200. Every comment I read says
Source: This is Why Ultra High ISO is a Big Deal in Photography