Visitors 9
Modified 9-Feb-13
Created 9-Feb-13
4 photos

This gallery of images shows the results of autofocus tests on my Nikon D800E camera. In particular, I checked the accuracy of the viewfinder phase detection autofocus (PDAF) sensors, comparing them against each other, and against the results obtained from using the Live View contrast detection autofocus (CDAF) system.

The camera was in the same position for all shots: on a tripod, approximately 2 meters from targets on a wall, and carefully adjusted for perpendicularity. Lens was an AF-S Nikkor 24-70mm f/2.8G zoom, set to 35mm. All shots were made at ISO 100, f/2.8, 1/50 sec. Autofocus was set to AF-S, single sensor. AF Fine Tune was at +7, which was found to be the best compromise setting for all focal lengths of this lens, when focusing with the center PDAF sensor.

The targets were illuminated by two 150 watt incandescent bulbs. In-camera white balance was set to 2800K. Camera was triggered with cable release. Focus was racked to infinity before each shot.

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Full frame imageFocusing on center targetFocusing on right targetFocusing on left target