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| p.1 #3 · Review: Canon EOS 70D Dual Pixel AF System |
I haven't read the review or too much else about this AF system, please excuse me if the idea I am putting forth now has been discussed before (or is even a feature Canon is providing):
It seems to me that since the dual pixels for sensor-based phase detect AF are the actual pixels of the image sensor itself, that they should always be perfectly calibrated (i.e., there is no mis-match of the lens-flange-to-AF-sensor distance as compared to the lens-flange-to-image-sensor distance. Accordingly, the camera should be able to auto-calibrate focus for any attached lens when focusing using the image-sensor phase detect AF. Furthermore, the camera should be able to auto-calibrate the conventional (mirror-down) phase detect AF sensor by comparing its results with those obtained with the image-sensor phase detect AF.
And if Canon does not provide this capability, maybe Magic Lantern will?