Aut­o­fo­cus ad­vances

NPhoto - - Test Team -

The D4s is de­signed to fo­cus faster and more re­li­ably than ever be­fore

The D4s uses the same triedand-tested Multi-CAM 3500 FX AF sen­sor found in the D4 (and D800), but Nikon has im­proved the aut­o­fo­cus al­go­rithms in the D4s to make it lock fo­cus faster and main­tain fo­cus more re­li­ably with fast and er­ratic sub­jects. There’s also a brand-new Group AF mode. Here, the cam­era uses four additional AF points above, be­low and to ei­ther side of the AF point you’ve cho­sen. This group of five AF points tracks mov­ing sub­jects with in­creased sta­bil­ity and ac­cu­racy, with less risk of the fo­cus shift­ing to the back­ground. This is vi­tal for pro­fes­sional sports pho­tog­ra­phers.

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