I have a Rokinon 14 mm lens for my Nikon D800E that I have found very useful for photographing churches, cathedrals, and other architectures of interest. Extra care is required since the lens is manual focus. Since we have all gotten used to autofocus, it is a real effort to handle a manual focus lens. Especially when using the lens in places that are not brightly lit.
For a "normal" lens, focusing is not all that hard, but for a wide angle lens it is a bit tricky since the variation in focus is slow with a turn in the focus ring. So much is in focus, or nearly so, it is hard to tell what you are doing through the viewfinder. So let's change the game and simplify the process.
