A technique whereby focus is locked to a certain position before the image is recomposed. This is usually offered via a dedicated button on a camera body, although it is sometime incorporated into some lens designs.
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If you're in the market for a lens, don't miss our complete guide to buying a lens, with 8 pages of tips and advice to help you make the best decision. Also in this issue we put three of Nikon's best DSLRs up against each other to find out what you get for spending more money. Plus much more!
Which of the new cameras announced so far this year are you most excited about?
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