I see that Pentax has announced upgrades with Nano coatings and curved aperture blades for better out of focus results. Also, of course there is a price hike, but will the 'old' lenses now be available for a bit less until stocks run dry? Is it worth buying expensive lenses that only work with APS-C bodies? Does this point to another nail in the lid regarding a FF body from pentax? This announcement possibly raises more questions than answers, I think.