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The Datacolor SpyderLensCal Autofocus Calibration Aid is a focus test chart, designed for use with select DSLRs that support autofocus adjustment. The chart allows you to test the autofocus accuracy of your camera - making it easy to fine-tune it for optimum performance.

The SpyderLensCal features a built-in level and tripod mount, allowing you to create precise testing environments. Cameras that support autofocus adjustments include the Canon 50D, 7D, 5D Mk II, 1D Mk III, 1D Mk IV, and 1Ds Mk III, the Nikon D300, D300s, D700, D3, D3s, and D3x, Sony A850 and A900, the Olympus E-30 and E-620, and the Pentax K20D, K-7, and K-5.

Datacolor SpyderLensCal Features

Fast, easy solution for your interchangeable lenses and recent DSLR bodies provides razor-sharp auto-focusing, using modern DSLR autofocus micro-adjustment technology
Compact, lightweight and durable, with integrated level and tripod mount, making this the most convenient way to adjust your own camera gear
Save time and hassle of sending your equipment in for service. Now you can check or calibrate your own lenses
Accurate and repeatable calibration of your lenses and recent DSLR bodies
Worthwhile investment to ensure your camera is focusing your lenses as precisely as possible

consult your owner's manual to confirm that your camera supports autofocus adjustment.