Originally posted by Mats We do not know that the lens is the limiting factor, it could be so that the lens AF speed is PWM controlled to a speed that the AF module in the body can handle. A faster AF module in the body might make it possible to control the lenses in a different way.
Pure speculation, of course...
Maybe. But for the DA55-300 I think it's hopeless even with a good AF, it will never be that fast.
I also have the D-FA 100 macro and weirdly enough (for a macro lens) this lens focus very fast (when it doesn't miss the focus point in which case it goes back and forth). It feels like exploding into focus when in good light. I think for AF-S, Pentax has just a bit of tweak to do for low-light (like they did with the K-m). It goes very fast to about the correct focus point then make small adjustments that take too much time. I think they should at least give us an option to select speed vs accuracy.
Now... when things are moving, it's another story and this is where they have to improve *a lot* to catch up with the competition, Sony and Olympus included. And here it's mainly a software problem, this has almost nothing to do with "Old Safox".
And oh yes, whatever the improvements they should drop the name SAFOX since so much people seem to "know" that it's not good.