Aperture Speed Priority
A or AV - lets you choose is the opening in the lens. The aperture size allows you to control depth of field which is the amount in front and behind your subject that will be in focus. Basic rule of thumb - Small f-number = small area of focus, big f-number = big area of focus Click for further reading on this topic Link to a camera simulator - This simulator allows you to manipulate focal length, ISO, aperture size and shutter speed and see the end results. You can blur motion, stop action, manipulate depth of field and much more. Great way to practice before going out and shooting. We will be using the Program Mode, S (TV) and or A(AV) mode throughout this course. The Program Mode lets you choose specific setups for your camera and gives you a certain amount of freedom. FOCUS: NIKON Single-servo AF (AF-S) In single-servo AF (AF-S), focus will lock if the shutter-release button is kept pressed halfway after the camera focuses. Focus lock is used to change the composition without changing focus. If you frame the shot so that the main subject is in the selected focus point, focus, and then change the composition while keeping the shutter-release button pressed halfway to lock focus, you can create compositions in which the main subject is not in a focus point but is nevertheless in focus. http://imaging.nikon.com/lineup/dslr/basics/16/03.htm Continuous-servo AF (AF-C)In continuous-servo AF (AF-C), the camera will continue to focus if the shutter-release button is kept pressed halfway after the camera focuses. Because the camera continues to focus up to the moment the shutter-release button is pressed all the way down, this mode is a good choice for subjects that are in motion. CANON
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