Originally posted by Adam Improved in the sense that it enables the use of the on-lens AF button on the 150-450mm lens.
Well, aside from the "Improved stability for general performance," whatever exactly that refers to, there was this improvement with v1.20:
- Optimized performance of HD PENTAX-DA 18-50mmF4-5.6 DC WR RE, HD PENTAX-D FA 150-450mmF4.5-5.6ED DC AW and HD PENTAX-D FA ★70-200mmF2.8ED DC AW.
As I noted before, that was the only improvement I had seen in the Ricoh specs for the K3II, that autofocus was better with the new HD lenses - that was before I realized there had been a firmware update. Looks like now the K3 is on par with the K3II, assuming the firmware update worked as expected. So yeah, no improvements with the K3II.