I was pleasantly surprised by the build quality. Aperture is not automatic, and the aperture ring is a little too loose. Forget about focusing through the viewfinder; finder image is too small. It's not too big a deal considering the extremely short focal length. I've had success setting to f/8 then approximating distance using the focus scale. In all, it's a good way to try out a fisheye lens for less than $300.