In reply to Marek:
> I can think of a number of way this could be done - ranging from promising to rubbish:
> 1. Camera takes a rapid sequence of exposures whiles shifting the focus slightly through the selected focus point.
That's exactly what the camera does, and hand held too. You choose the aperture and the subject matter then press the shutter. The camera then individually focuses on each of the 49 focus points and fires off a shot. The witch-craft comes when you review the image on the screen. Press one area and the image focuses on that point. Point onto another part of the screen and the image focuses on that position.
Awsome and works perfectly. The only problem, and its not a problem really, is that the images caprured are JPEGS rather than RAW.
The camera takes 4K stills in a similar way but is more for stuff moving around rather than a still-life shot. You take a 4K movie of what ever is happening in front of you. After that, you review the images and select the one you want. Its an in-camera screen shot of what you have just taken. This gave me mixed results, and to be honest I much prefer the fast burst rate of a shot taken at x-thousandths of a second.
Still got to work out how to focus on a small black dog running as stupid miles per hour.