How do you handle the inconsistent D800/D800E PDAF with different color temperature?

Started Feb 19, 2013 | Discussions thread
Marianne Oelund
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Discontinuity produces a match
In reply to rayman 2, Mar 3, 2013

rayman 2 wrote:

THere is nothing weird about that ! Halogen lighting has 3200 or 3400 K and normal incandescent has 2400-2700 K depending on the current.... and a lot of other things..

I demonstrated that the halogen exhibits the same focus shift reported for other incandescent lamps.

Fluorescent light does not have a full spectrum and cant in no way be compared to

natural light sources that have continuous spectrum.....

You can filter the flourescent light but you cant reestablish a full spectrum.....

Of course, but the point was that the discontinuous fluorescent spectrum produces AF results equivalent to nice, continuous daylight.  In other words, the lack of a full spectrum isn't causing a problem for AF.

The rgb sensor of the D800 and the D4 is sensitive to that difference and the cameras rgb sensor

uses that information.....

It hasn't been established that the RGB sensor is used to compensate for color temperature effects.  If it is, they certainly didn't implement that compensation correctly.

Your D4 is smarter then you think it is !

This was a D800E test.  I haven't tried the D4 yet.  However, if the camera is that "smart," why does it have this problem?

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