first mirror. range of use - photo shoots for friends, concerts, travel, subject photography of their jewelry. Bought complete with kit 18-105. I saved on the carcass, got a decent lens, arguing that a good lens will remain for a long time, and the carcass, if I take a close look at photography, will still need to be changed. I clicked about four thousand frames in two months from the purchase. Despite everything, I am satisfied with my kit, having exhausted the 3100 carcass, I will save up for the d90 or d7000))))