The Fujifilm XF 70-300 f/4-f/5.6 telephoto lens is an absolute powerhouse at a fantastic price. First, we get an insanely useful telephoto range of 107-457 in full-frame terms. Then, we get 5.5 stops of image stabilization, which helps to shoot landscapes and more in lower light. We also get a linear focus mechanism, allowing for super fast and accurate focusing, and a weather-resistant designation which means it's…