Originally posted by Zygonyx But i obviously doubt the K-r replacement will be mirrorless, because K-mount based mirror-less would lose a lot of it's compactness.
However, it would presumably be a bit lighter for not having the mirror and the penta-mirror (or penta-prism). Arguably weight matters more than size, since its not going to be pocketable. Indeed, many users like a physically large body with large buttons (and plenty of them); we don't all have girlish tiny nimble fingers. Note they already
have small, in the Q, so they have that covered and they need to differentiate their product lines.
In addition, mirrorless would eliminate mirror slap. It would give all the benefits of an EVF, such as being able to zoom in for manual focussing, preview exposure, depth of field, show histograms, blink over- and under-exposed pixels, and show other information, all without taking your eye from the viewfinder. Presumably, with fewer moving parts, it would be more reliable and cheaper to make. (It'd also have disadvantages, such as consuming battery power constantly, and there are some unknowns, such as whether it would be fast or laggy, and whether the resolution would be high enough. Hints from the Kitazawa interview make me wonder if they would aim for very high resolution.)
It seems to me that one of the few things Pentax
have been clear about is their commitment to the K-mount. It's my belief that means more than an optional adaptor, at least in the short term. Recall also that one of the few things John Carlson said is that he didn't think Pentax had the resources to do a new range of lenses; I would agree. Jonathan Martin reaffirmed Pentax commitment to the Q-mount, which currently has very few serious lenses, so they will surely be quite busy working on more of those. To do two new mounts would be over-stretching it. John Carlson also made it clear Pentax see the second-hand lens market as an asset that helps them sell more bodies, rather than a liability that prevents them selling new lenses. (He was talking about the 645, but the same logic applies to the K-mount.) He also acknowledged there was demand for longer Pentax lenses - "We have a hole I hope we explore". One of two new K-mount lenses would help fill out the range. There would by synergy in that; and it would reassure old and new customers alike.
So I believe that if Pentax do a APS-C mirrorless this year, it will be K-mount. And I think it could be jolly nice.
(I've argued elsewhere that the time to do a new mount is in few more years time, when it can exploit solid-state shutters and apertures. Now would be premature. The K-mount has lasted for over 30 years and any new mount ought to aim to last as long, so it is not something to rush into.)