Originally posted by JPT Just tried this camera in the store to see what the new sensor AF was like. I used the lenses they happened have on the display, and they tended toward the consumer end the spectrum. My point of reference for LV is a K-01. It work significantly faster than that. Just first impressions, but . . .
DA18-135: reasonably fast, sure
DA 35 2.4 and DA50 1.8: very quick and sure
DFA50: macro slow, struggled to find focus at all
DA50-200: slow, hunted
DA18-270: average
DA17-70: slow, hunted
Some long slow Sigma (70-300?): Average
Some of the lenses now seem to be faster in LV than through the OVF.
In the hand, the camera just has a more conventional, serious flavour than the K-S2. I think it's the finish, appreciably on the top plate.
I had another try of this at the weekend, this time at a shop with some good lenses to hand. I'm still talking only about live view focusing only. The D-FA 70-200 and D-FA 150-450 worked fine, but nothing amazing. Actually, I don't know how fast they focus normally, so I don't have much of a point of comparison. The DA 16-50 was not very fast, but I think the limitation is very much in the lens itself.
The one that amazed me was the FA77. I have that lens and it focuses better on my K-01 than my K-5iis, which indicates it's a bit of a strange lens for focusing. In live view on the K-70, it was astonishingly fast - just zipping into focus almost immediately. The DA21 Ltd also focused very well.
Unfortunately, it doesn't seem to be possible to try the video focus without a card inserted, so I couldn't try that. And remember that my observations are very unscientific.