While I've almost always limited myself to carrying my 17-40mm and my 85mm lenses on my photo tours, I recently gave a try at taking *only* my 150mm macro lens. This lens is awesome! Giving you entirely different pictures, I'll try to use this lens more often now: I like shooting small details anyway, and with true 1:1 macro capabilities one just has a lot of different options with choosing your details — while the 150mm and f/2.8 give you a decent tele lens for plenty of other shots!