Originally posted by Fogel70 645Z also has CDAF in LV, which most likely cover the whole frame.
This might actually be a killer feature on a camera that often is on tripod.
I have seen action photography done with 645D. Those 11 points in it really came in handy.
As for the position of the AF points inside the 645Z being same as in the K-3, and not spread across the entire frame, I see that as a bonus. Because of the nature of MF.
Closer and more tight space between the points (relative to MF sensor size) means that action photography is possible again, and will enable AF with less errors or undesirable outcomes that would creep in if the space between dots were wider.
Because of its vast DoF control and significant change of mood in a photograph if the focus is changed from one dot widely separated from another, the photographer would need to repeat shooting sessions consecutively and to endless frustration. An MF photographer really wants AF points to cover just ONE part of the frame, not the entire frame.
An MF photographer wants
very subtle changes in photographs — not different moods altogether. In short, an MF photographer wants to exercise control to a much higher degree.
Thus relying just one one AF point (stills) and recomposing slightly, or on 27 of them but very closely packed together, the results are more controllable and they give optional choices, rather than totally wrong shots. Say, with 27 AF dots an MF photographer can selectively change focus across a model's dress
without changing camera's relative angle, and in the final selection choose a shot that the art director approves.
Or, a photographer can frame a shot with a cluster of all 27 dots across the model's face, and then selectively change focus: from tip of the nose to the base of the nose, to eyelashes, to earrings, to cheeks, tip of the lips, chin, etc. And that kind of control is what is really wanted, in demands less strain on the model, sessions are done faster, which means models are less tired, less energy is consumed for wiring, lights and flashes, etc.
In other words, it is sensational to have such an AF system inside an MF body.
Last edited by Uluru; 04-19-2014 at 05:09 PM.