I am shooting with a Canon 5D Mark IV 30.4 MP Full Frame DSLR body, RF600mm F4 L IS USM lens and usually 1.4 teleconverter which gives me a 840mm focal length. I shoot autofocus in Manual mode with auto ISO. Settings for the Winter Wren were 1/8000 sec.at f5.6 ,ISO12800. I edit using Adobe...