Use your AF -ON * button to activate autofocus. This technique wi ll greatly assist your WILDLIFE photography.
Pro-file Chris has been a professional wildlife photographer for 30 years, including 14 years as in-house photographer for the RSPB. He was named European Wildlife Photographer of the Year in 2007.
In your camera’s Custom Setting Menu, under Autofocus, you will find an option for AF activation. Choose ‘AF-ON only’. Now the AF function is completely disconnected from the shutter release mechanism. In practice, this means you can focus with your thumb in continuous AF mode – which means your camera will automatically adjust the focus whenever your subject moves towards or away from the camera – and use your forefinger to fire off a burst of shots at the height of the action. The trick is to make sure the active focus point remains over the subject the whole time – think of it as tracking the subject through the viewfinder. It takes a little getting used to, but once you’re familiar with it you’ll find the back-button focusing technique simplifies the process and improves your hit rate.