touchscreen is a lot better than no controls at all...
True up to a point. However, I lusted after a Panasonic GF1, but never remotely considered a GF2 or GF3 for precisely this reason.
... if I haven't made any mistakes, the images are real and the visible sensor area is nearly the imaging area.
One weird thing: the mount is very similar to the standard EF mount but ... it is rotated by roughly 15 degree counter clockwise ... so the adapter will never be a standard extension tube.
Would never be a standard extension tube in any case, for EF lenses apertures and focus to work you would need some comms between the body and camera. The ribbon can follow any path it wants between the two ends, so the rotation is hardly a big deal (so long as the adapter rotates the lens back by the same so that the
focus scale, switches and bayonet petaled lens hoods stay in the correct final position) an extension tube is generally designed to permit closer focusing, an adapter is generally designed to retain regular focus ranges of the adapted lens.
That said, it could be a great camera for adapting antique or obselete optics to!
A Pancake 40 would look perfect on it.
That may depend on the adapter! If that is, an adapter is required.