Robert Body , Sep 01, 2011; 04:04 p.m.
Lots to say.... lots to read [for you, here and in other threads]...
50mm f/1.4 or 1.8 and 85mm f/1.8 or 105mm f/2.8 macro
buying from Adorama/B&H
flash - a whole new topic. umbrella, soft box, 2 lights. lots to learn there, need an assistant too... maybe without a flash or a single flash off camera at start
light quality....... technique..... large aperture [small f-stop], like f/2 or so
[no flash, June, 5:52pm, sun filtered by a tall tree leaves]
sooner or later you will need a flash, or 2, I would minimize the body/lens expense, keep the body, use a 50mm f/1.8, get that used in mint condition.... and I would spend a lot of time [and money, maybe used stuff] on flash, speedlights or Alienbees, not sitting on top of camera though.
Otherwise, without a flash, you're at the mercy of the quality of sunlight, shadows, missing a bit of a standing out of the faces against the background .