I use it quite a bit-it's equivalent to a 150mm in 135, which is a focal length I like. I get great results from it. I like it best with the crank on the body and waist level finder, as it makes a setup that is really well balanced and easy to hold, though it's still good with the prism. I use a tripod whenever I can, but that's not always practical, and the combination of balance, mass, and leaf shutter make it possible for me to hand hold easily at a 125th. I have the 150, so I went with the 250 as the next step up. My main criticism is that its 3-meter focusing distance is limiting at times. Though an extension tube does take care of that.