As this was written in early April, there were reports on the web of serious problems with D800 autofocus accuracy using off-center focus points. As this was written, I have no confirmation of that assertion; this test does not address it.
The results shown here were one test, corroborated with a few field shots. Further research is needed, but this test proves that autofocus is a hit-and-miss game even on this no-brainer subject matter, which has no ambiguities for the camera AF system to deal with.
The camera was on a tripod.
The camera was set to AF-C mode with AF-C priority = Focus, and 11 focus points. I selected the focus point, manually defocused the lens for each frame, then pressed the AF-ON button until the green in-focus confirmation light lit up. Since the camera and subject were fixed, this ought to be an easy task for the camera (as opposed to a moving subject).
Article continues for subscribers...
Already a subscriber? CLICK HERE TO LOG IN
Since 2006, Diglloyd Advanced Photography is the authoritative review and reference for DSLRs and their lenses: Canon and Nikon primarily, but also Pentax and some medium format. Reviews of key DSLRs are included, but the primary focus is on lens performance. Also included is a wealth of technique and workflow approaches.
DAP includes thousands of pages of exclusive coverage and high resolution Retina-grade examples detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare, behavioral and practical usage.