Originally posted by monochrome FWIW, K-01 w/ DA40 Ltd., DA55~300, FA50/1.4 and FA35/2 is much faster now. It also knows which direction to move in rather than cycling out to the stop and back in. I didn't pre- and post-test because I wasn't expecting this much change - but this isn't placebo effect, for sure - Impressive improvement.
Yes, just like I posted you can tell the difference in speed especially if you are watching the DOF scale on your lens (if equipped). Any twiks they did on the firmware upgrade doesn't mean its just exclusive to HD 560mm this is meant more for the camera bodies software to compensate for issues on using the HD 560mm. Lens. If the past firmware of the bodies didn't function well (stability, cdaf, etc.) then all Pentax made is to tune it up better. Remember the HD 560 mm. have a arpeture of f5.6, this is not a fast zoom lens, with this type of lens you want a more stabilize and more lower (sensitive) EV's on your AF, an extra numbers on the firmware would make a big difference after all a lot of guys have tethered their cameras already including me. Pentax could have realize a lot of issues on their new lens that's why the have a sudden release of the firmware before the lens went out to market. If this is true then Pentax made a good job in keeping customers happy and their quality up to standards. Thanks again Pentax.
Please remember my observation is based on my K-5 an on DA and DA* lenses.