Back to Kurt: depending on what your plans are (shooting wise), I'd go ahead and get it. You can easily re-sell it for how much you got it for the begin with most the time. That said, just remember that focusing close is not a M7 strong point, and the f/4.5 doesn't make it really a fast lens either. But once again, depending on what you're doing with it, this might or might not matter. For landscapes, certain city scenes and other extreme wide shots, it's delightful to use and definitely worth getting at some point.