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Message: <blockquote data-quote="RAH" data-source="post: 1368109" data-attributes="member: 5834">I just want to weigh in a little about the AV versus TV controversy. One reason I think they recommend Aperture priority for wildlife photography is a trick that seems counter-intuitive: you can GUARANTEE yourself the absolute fastest shutter speed (with a correct exposure) under a particular lighting situation but using AV mode and opening the lens as wide as possible. With this setup, the camera will always chose the fastest shutter speed possible for the light available.Another advantage of Aperture priority is that it gives the camera more room to operate to find a proper exposure. What I mean is that there are many more shutter speeds available than aperatures (with most lenses), especially with a zoom at higher magnification, where the max aperture is smaller. If you use shutter priority, you are more likely to encounter the condition where the camera cannot give you a proper exposure because it cannot provide an appropriate aperture.</blockquote>