sry, i dont understand your question.
if the question is how you can get a better general knowladge about iso and cameras and everything, it comes down to:
buy sth. play with it. get to know anything. make mistages. know the mistakes. correct the mistaked. buy something better. have more fun, enjoy what you are doing.
There are lots of sites like www.dpreview.com testing cameras and iso settings and there is www.fstoppers. doing some video reviews (Also popular is that guy:
http://www.youtube.com/user/DigitalRevCom ) who does reviews.
But to get a good understanding and feel you gotta try yourself. there is no way around it
This post was edited by Phil. on Jul 28 2012 06:23pm