Speed up your zoom’s autofocusDPMag Published in Blog
You know how some zoom lenses have a switch on the side that allows you to adjust the AF to the full range, or just a part of the possible zoom range (say, closer than a certain distance or farther than that point)? Well, that switch comes in really handy when you want to autofocus quickly. Fast autofocus, like when you’re shooting sports or wildlife, is the perfect time to flip that switch to the appropriate distance. It will keep the AF from searching near for focus when the subject is far away, and it will keep the lens from searching for far focus when the subject is up close. It's a great way to keep from missing the shot when shooting fast moving subjects and/or in low light. Read about this practical advice, including a few other ways to improve your autofocus, at the Photonaturalist blog.
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