Here is the question , is a 40d adequate for portrait work ? I'm going to be shooting a seinor portrait and have been thinking about a new lens or maybe a 5d2 . Right now I have a 70-200 2.8L and a tamron 17-50. I've been looking at a 24-70L , 24-105L , and 85 1.8 . Over all I've been somewhat dissapointed with my results with the 40d as compaired to my old xti . I can upgrade to a 5d2 but I'm pretty much going to have to live with my lens line up for awhile if I go that route. I know you can never go wrong with glass but the full frame IQ is really tempting . Suggestions