Nearly all cameras have several AF points and will select the best focus point automatically – usually the one nearest the camera. Most cameras allow you to choose the focus point yourself if you want to. Below is a simulation of [...]
Tag Archive for 'Autofocus'
AE/AF lock can be applied by half-pressing the shutter release or using a special button on the camera. It enables you to fix these settings and then reframe the shot without altering them. It’s useful for tricky exposure conditions or [...]
The camera only focusses when you press the shutter. Cameras can attempt to focus continuously, or only when you half-press the shutter release. The latter method is generally the most satisfactory. ‘Continuous AF’ is noisy, uses up battery power and [...]
The camera attempts to anticipate subject movement. It might sound like black magic but it isn’t. The camera’s autofocus system tracks the subject as you follow it in the viewfinder and it can use the focus information to extrapolate the [...]
Focussing on where the action will take place and waiting. This eliminates any focus errors or shutter lag while you’re waiting for the camera to focus. Even a half-second delay will spoil action shots, which rely on split-second timing.
The camera keeps adjusting focus all the time. Usually, you focus a digital camera by half-pressing the shutter release. This introduces a delay between framing the shot and when you can actually take it. Camera makers have tried to get [...]
Where the camera chooses which part of the picture to focus on. Nearly all digital cameras use several focussing points within the frame. In Area AF mode the camera selects one of these focus points automatically from an overall focussing [...]
In dim lighting, the camera may not be able to focus successfully. Some have an ‘AF-assist’ lamp which activates automatically in poor light to aid focussing. This lamp shines a tightly focussed beam of light on to the subject, and this [...]