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It may not be lens dependent. Is face tracking turned on?No Sony lens yet, using canon EF and metabones smart adapter--
It didn't even occur to me it would be lens dependent.. Shortsighted.
Not referring to eye start. The A7 and A7r have a feature similar to face detection, but that seeks out the eye specifically, and places focus there.The "eye focus" has been a feature on Sony alpha mount bodies for the last 8 years or more. Activated by the sensor above the EVF on the a7's, it engages the autofocus as one brings the camera to eye. One would accomplish the same thing by half-pressing the shutter button as one brings the camera to the eye.
I've disabled eye start in the menu for all my camera bodies. I've never understood the point of engaging autofocus, until one has the camera to eye, and pointed at what one wants to have in focus.
In addition, the sensor often activates if one leaves the camera on, and suspended from a shoulder or neck, or left in the case. It can quickly deplete a battery, and in the a7's case, the battery reservoir isn't large to begin with.
Graham
I am still confused. I want eye focus to work too. What is the specific button EF is engaged by? So you are saying you turn face detection off. I did that. But which button do I activate EF with? I have a Sony lens 35mm.Made some headway, face detection is not necessary-
It seems, Eye focus is engaged when assigned to a specific button, and that button is pressed- it seems to override all the other focus settings.
One the plus side, it does work with canon EF lenses and the metabones adapter!