I'm going to be assisting at an upcoming wedding and amongst other things, will have time for some detail shots. While I have done closeup work, I was thinking of renting a true macro lens as all I have right now is my Tamron 28-75 which is only a 1:3.9, so close up but not really macro. The price of rental between the various focal ranges is negligable. 50mm, 60mm, 100mm? I understand that the shorter the focal lenght, the close you need to be, but as I am not photographing insects, that isn't a huge issue. I'm more worried about image quality and such. I hear great things about the 100mm... I shoot an XSI, will be using a tripod, no macro / ring lighting, hotshoe flash only (430exII). Thanks for any tips!