I’m having a little discussion with a fellow photographer about what mode I should be shooting in, AV or TV. I use a 7D, 70-200 F/2.8 L IS II, Fantastic lens. Anyway, I shoot equestrian events, from walking to jumping. I always shoot Shutter Priority, 800-1000 sec. 100-200 ISO, the camera will select f/4.5-5.6 90% of the time which works good for me. He said that I should be shooting AV mode and let the camera select the shutter speed. He quoted an article: Aperture-priority is the best general-purpose mode to use. The image quality of a photograph is often limited by the available light. The correct setting is therefore maximum aperture: to allow the most light to enter and enable fast shutter speeds (to reduce camera-shake and motion-blur).Aperture-priority is a good default, general-purpose, exposure mode. The other modes are used in specialized situations.In most situations the photographer who wants to minimize motion-blur as much as possible, then setting maximum aperture (in aperture-priority mode) to get the highest possible shutter speed, makes more sense.
My thought was I know I want to stop action, so I use Shutter Priority mode TV, if the aperture setting happens to come in lower than I want, let’s say 2.8 I just increase the ISO setting. Using the AV mode just doesn’t make sense to me, seems backwards. How are You shooting sporting events where motion is an issue?