Robert Coe writes:

On Fri, 29 Jun 2012 13:22:17 +0200, Wolfgang Weisselberg
wrote:
: Me wrote:
:
: Not sure how the auto focus point select system works on the higher
: end nikons. Despite 51 AF points, there's surely not enough data
: for full face detect,
:
: The 1DX does have a rather high resolution exposure sensor,
: which has more than enough resolution for face detect ...
: a fact that Canon has cleverly engineered in and uses.

Isn't the crux of the matter that face detect can work only in live view mode?
Because if the image of the subject is being deflected into the viewfinder,
it's not available to the sensor for analysis. Which would seem to make it
useless for AF if the camera is used for action photography.

Not as I read the descriptions and user reports. The D4 for example is
using the matrix metering sensor for face detect, and it can do that in
reflex viewring mode.
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David Dyer-Bennet, ; http://dd-b.net/
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