going to do some portrait shooting tonight with my girlfriend, itll be at night, inside moderately lit room using the onboard flash, what do i need to know? Should i use the portrait mode, or try some of the creative zone functions? im guessing ISO 800, most likely using my 50mm f1.8 lens, for its sharpness, though I my try all three (kit lens, and 70mm-300mm) and just see how well it works, this is really the first time im going to be shooting people (that sounds bad dosent it?) and would love any advice, thanks!!!