Originally posted by cobbu2 And for curiosity's sake, I know nothing of mirrorless cameras or Pentax's history with them, but for my knowledge, why would legacy K-mount capability thwart Pentax's mirrorless efforts? Other manufacturers introduced mirrorless systems with old and/or new mounts alongside their flagship mounts, I.e. Leica, without changing or moving on from them; what would make Pentax any different? Not saying I disagree, just curious. Thanks, Allan
See this discussion:
https://www.pentaxforums.com/forums/6-pentax-dslr-discussion/325643-will-rico...ss-camera.html
As I understand it, the flange on the K-mount requires a certain minimum distance to the sensor. So a mirrorless K-mount camera will always be bulkier than other mirrorless cameras with purpose-designed mounts. Exhibit A: the APS-C mirrorless K-01, which is much bulkier than rival mirrorless cameras, and never really took off. That is why Ricoh's commitment to the K-mount for backward compatibility limits its options for a mirrorless camera.
Of course they could develop a new mount which could also accept K-mount lenses with an adapter (maybe with autofocus), but they would need to launch a whole new range of lenses to support it. Pentax did that with the Q (with limited success), but to do it with a full-frame or APS-C sensor would be a big commitment for a company with limited resources.
Fuji effectively turned its back on Fujinon legacy lenses; they must have put a fortune into developing a whole new range of lenses with the X-mount. X-mount lenses cost about double their K-mount counterparts, and few third-party manufacturers develop for the X-mount. That's the alternative route.
Personally, I'm content with Pentax's strategy. As for the legacy v modern lenses argument, I'm just pleased that we have options for all tastes and budgets.