When the Sony A99 SLT was announced last month, photographers gawked at the camera’s 102-point focal plane phase-detection system that compliments its traditional 19-point AF system. If you’ve been drooling over the idea of using 121 separate focus points, here’s some bad news: the feature may not be compatible with your Sony lens.

The Phoblographer reports that only 6 lenses will be able to take advantage of the new system when the camera is launched later his month.
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