I'm learning how to better use the Sigma 19mm and 30mm E-mount lenses with the Sony NEX-5N. Both of these were taken with the 30mm in the late afternoon sun. The 30mm was stopped down to f/5.6. In spite of the aperture the backgrounds are still quite pleasantly out-of-focus. I guess if I'd wanted to I could have opened up the lens to its maximum of f/2.8 and made the backgrounds even more blurred. Maybe. I could have stopped down to f.8. Next time I'll try that.