After a search I haven't found an answer. I have a Sonnar 4/180mm lens for my Hasselblad and love the quality of portraits and landscape work. However, due to it's size and weight, it's difficult to travel with it. I travel in Mexico often and would like to move down in focal length, size, and weight to a 150mm or the makro-planar 120mm and use it as my prime lens. Travelling with the Hasselblad, one lens, and a spot meter would make me a happy camper. The question is this: are the optics as good, and is the differential in price due to the macro ability of the 120mm and/or superior or inferior optics. Opinions appreciated.