I just purchased a Sony NEX-F3 camera and want to extend the long distance shots for pictures of wildlife at 200+ feet. This telephoto lens is offered at a good price: VIVITAR HD 500MM TELEPHOTO F8.0 LENS FOR SONY a NEX-F3. Does anyone know if it will work properly with the NEX-F series of Sony's? The F8.0 concerns me that it may be too dark and also, if the shots are fuzzy and out of focus like a cheap binocular that will be disappointing. While I really enjoy the indoor and normal outdoor shots, the didgital focus is not long enough for wildlife shots close up or I am not doing something right?