i have a canon EOS digital rebel with a 28-105 mm lens 1: 3.5-4.5 II USM. a new mommy, i have been taking tons of photos that have once again sparked my interest in photography. for the life of me, with the above lens i can't achieve sharp, well lit, indoor close-ups. i find the manual setting to be the best, but the autofocus doesn't do what i want, and to attempt a manual adjustment with a squirmy 7 month old, well...i lose the shot... i think i need to invest in another lens, but am open to suggestions. i have played around with ISO speeds, apereture and shutter speed combos both in pre-set and manual modes. i think my next lens should be a macro, however i don't know which one would achive my desired results. basically, i like to shoot people (lately the little one) close up and using natural light, but i don't want to stand on top of them. outdoors is a non-issue, it's in my poorly lit home that i run into problems... what are the pros/cons of a Canon EF 50mm f/2.5 macro vs. a Canon EF 100mm f/2.8 USM macro. how close would i need to be to get a good shot? what do i need to consider as far as the lighting goes? thank you!