Master your camera’s autofocus: which AF points to use and when to use them
How to fool your autofocus – and why you should do it
Unlike One Shot AF mode, which locks the focus setting as soon as autofocus is achieved, AI Servo AF mode automatically tracks moving targets, from kids and pets at play to racing cars or roaming wildlife, adjusting the focus as necessary up to and including the moment when the shot is taken.
It’s tempting to manually select a single AF point that corresponds to the position of the moving target within the frame, but this often demands an incredibly steady pair of hands and an almost superhuman panning technique.
Switch to the Auto Select AF Point (multi-point) setting when using Canon’s AI Servo AF or AF-C on Nikon and Pentax cameras, and the camera will initially focus and track moving subjects using only the central AF point.
the target strays from the centre of the frame, alternative AF points will be automatically used as necessary, so the camera can continue to track its movement.
PAGE 1: What your camera’s autofocus points can do for you
PAGE 2: Making the most of your range of AF points
PAGE 3: When to use your different AF points
PAGE 4: How to choose the best AF point
PAGE 5: How to fool your autofocus – and why you should do it
How to use autofocus with moving subjects
What is focal length: definition, comparison, every question answered
Depth of Field: what you need to know for successful images
on Thursday, February 7th, 2013 at 4:42 pm under Photography Tips.
Tags: camera tips, How to focus