I've searched the archives and materials from lens manufacturers and have not found a clear answer to this question. If I want to shoot in the range of 1:1 to 1:4, should I invest in a dedicated macro lens for optimum sharpness, or can I get away with a modern "flexible" magnification lens like Schneider's Super Symmar XL 80 or 110 and therefore get a dual purpose lens in the bargain? Will it make a difference at 1:2? Also, in order to limit bellows extension or contraction, does it make sense to get an 80mm lens for close ups? or are there more advantages to getting something in the 110-120mm range?