Pentax M20/4; A50/1.7; M85/2 a very versatile travel kit at a very small size.
My MZ-5n is basically no different from the above setup in size.
Just that the one above is a tube adapter and the one on the MZ5n is the portion housing the mirror box.
In other words, a FF camera of this size is possible for Pentax.
And the great thing is, the Pentax lenses makes so much more sense on this sort of smallish camera being not too big themselves.
Brands like Canikon really have a problem since their largish lenses offer no advantage even if they come up with a smaller FF camera body.
I am very ready for Pentax FF.
They just have to at least announce one within the year.