Gary Wolstenholme takes a look at this compact super-telephoto lens with a silent focusing motor, full time manual focus override and a bright f/2.8 maximum aperture, which gives an equivalent field of view of a 300mm lens on a 35mm camera.
Outstanding resolution; Almost zero distortion; Low CA; Fast focusing; Weather sealing; Build quality; Light weight
It doesn't fit other makes of camera to allow everyone to enjoy this lens