The Canon 1D X has Canon’s latest generation autofocus technology, so I decided to put it to the most important test to me: can the camera “nail” the focus at ƒ/1.2 at various distances and a variety of subject matter under differing lighting conditions?
I do not expect perfection from any autofocus system, and there are some subjects that are ambiguous even to the human eye (where to focus exactly), but the key is can the camera get it right in the non-ambiguous cases most of the time?
At ƒ/1.2, there is no margin for error.
As this test is all about focus accuracy and the subject matter was purely ad-hoc (of no artistic merit), the images shown here are all actual pixels crops at the point of focus.
Article continues for subscribers...
diglloyd Advanced Photography includes hundreds of pages of exclusive coverage and high resolution, Retina-grade example pictures detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare. Also included is a wealth of in-context technique and workflow insight. Since 2006, diglloyd Advanced Photography is the authoritative review and on-line reference for discerning Canon and Nikon shooters. Subscriptions cost $ per year.