>>3831532I'd suggest to get the 100mm as your next lens, it's usually found for pretty cheap, aperture of f/3.5, closes focus is 0.75m and is the lightest lens for the GS-1 system. The 150mm is an absolutely gorgeous lens but the minimum focusing distant is pretty far at 1.5m, I managed to get my hands on the C.U.L. -1 and -2 so the minimum focusing distance isn't an issue for me.