The AF in the K-5II is pretty good. It still has the same fairly large
sensor points and only 9 of them, like the original K-5, but it's snappy
and mostly correct, if you don't expect perfect eyelash focus. It will
choose the eye brow most of the time, seems to favor the closest thing
the focus point is over.
I've never shot with a K-7 or K-3, came to the K-5II from the K20D, and
my first and lasting impression is finally Pentax AF that mostly works.
Everything I've read implies that the K-5II[s] focusing system is much
superior to the original K-5, pretty much the equal of the K-3 with less
fine control since the K-3 packs two and a half times the number of
focus points into the same area.
Most reviews of the K-1 focus system seem to think that in spite of
being on par with or maybe a bit better than the K-3, the focus points
are too concentrated in the center of the frame, for a lot of purposes.
That's not surprising as I expect the footprint of the K-1 focusing
module is exactly the same as the K-3[II], and some version of it will
find itself in the next iteration of the APS-C flagship, if Ricoh
decides to keep producing a semi pro APS-C body.
On 1/8/2017 4:04 PM, Gonz wrote:
Question: How is the K-1 autofocus, as compared to say, a K-5? I was
looking through a batch of pictures I took recently at a family
gathering and was appalled by the autofocus performance. Many of the
shots were off, lost forever. So bad that I started looking at other
systems like Nikon D500, etc, which reviewers say is on par with their
flagship D5.
I just don't want to invest in a 2K camera if they haven't at least
made this essential (to my tired old eyes) part work much better. No
matter that I have $$$$ tied up in so many Pentax lenses.
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