Have you ever witnessed slight changes in focal length as you bring your subject into focus? Whether or not you knew what to call the phenomenon, you've likely experienced it many times before.
Granger explains the phenomenon and looks at just how dramatic it can be across the ‘Nikon Holy Trinity’: 14–24mm f/2.8, 24–70mm f/2.8 & 70–200mm f/2.8. Granger even tossed in…
via Imaging Resource News Page http://ift.tt/1vZ9oQx