Opinion: that first shot of the top showed me everything I need to know in order to use this camera. This, IMO, is Pentax's strength - the beast is immediately usable and understandable without wading through the entire manual first. That "empty" control button/dial thingy is going to make life so easy for us, especially if the important information can be projected onto the OVF (which from the size of the pentaprism looks pretty likely). We are almost certainly in HOTAS territory here (aerospace talk, "Hands on Throttle and Stick" - in this context, everything you need to touch is under your fingertips and everything you need to look at is projected in front of you, so you can keep your hands on the camera and keep your eyes glued to the target and take your shot.)
I predict that either the shake-reduction mode or the as yet unmarked mode (white dot) will control the pixel shift.
I deduce from the crop control option that we will be able to override auto-crop if we wish to suffer the optical consequences (some people might like their pictures circular).
If 'grid' really does control an OVF overlay, things could get exciting.
I agree with thoughts so far expressed on the ISO mode button - the dial will allow you to set sophisticated selection modes/expanded sensitivity; the button is for rolling back and forth between ISOs when you need the dial for something else.
I think the metering (spot, centre, matrix) and AF point (single/multiple toggle) selectors are the buttons on the top back left under the mode dial. There is the possibility that the unmarked white dot on the right-hand menu knob could be configured for anything you want - including rotating through the AF points.
Anyone who gets a chance to handle this needs to ask them to take the lens off, so you can look inside the mount and see if the fondest dreams of the K/M lens crowd have been answered.
This camera is awesome. I suspect it's also going to be awesomely expensive, but so what? I think it's going to be that well-integrated package I was hoping for, and if the image quality is anywhere near as good as the control system, this is going to be a Canikon-killer. And if the control system makes its way down into APS-C land (K-1? KS-3?), it's going to knock some serious holes in that section of the market too.
And for the record... if I were a Nikon user, I would snap up the Df in a heartbeat.
Last edited by pathdoc; 10-23-2015 at 04:27 AM.