When taking lacrosse and football photos, I prefer to set Canon 6D to TV mode using 1/500 or 1/640 with appropriate ISO for time of day or night. In the Spring in late afternoon / early evening games. After having no problems for say first 100 photos, the camera in TV mode starts setting aperture too high (say 9, when just before was 4.5 in identical light), thereby creating photos that are way too dark. I shoot with sun behind me, so the natural light is pretty consistent, while the aperture selected automatically in TV mode jumps around wildly.
To avoid missing too many shots when this occurs, I move to Manual mode, keep speed at 1/500 or 1/640, and set aperture to correct number. I'd prefer camera do the work while I zoom in and out. and as the sun begins to set.
I never had this problem with other Canon DSLR's. Also, the camera behaves once it's totally dark and I'm depending on stadium lights.
Am using Canon 6D with Canon 70-200 mm EF IS II USM.
Suggestions?
