The Panasonic Lumix G 7-14mm f/4 for your Micro Four Thirds body brims with quality. For example, it has a silent internal autofocus, a very solid construction, and good corrections for possible lens errors. It can also correct image distortions, which is nice, because you're always shooting with an ultra-wide angle. Since this 7-14mm is a Micro Four Thirds lens, you can't compare it directly to a full-frame or small-frame lens. The aperture value is much better than the f/4, for example. You'll have one or two more light stops; so an f/2.8 or f/2. As a result, you can catch a lot of light, and you can also take sharp photos in low-light conditions. Do you prefer a fisheye ultra-wide angle? Take a look at the Panasonic Lumix 8mm Fish-eye.