My friend asked me to take a few pics of all the children in his family (8) for his parents 25th wedding anniversary. The thing is, I have never done portrait work before. Any tips?/ The Dslr I have right now is a pentax k10d. the lenses are; 100 mm macro, 12-24 wide, 10-17 fisheye and the 18-55 the camera came with. All are pentax glass. I think they may want to do it outside, which would be good cause i have no flash right now...any help would be greatly appreciated........GO SOX!!!!!