Originally posted by Sperdynamite But I'd switch to the K-1 in an instant if it offered even 75% of that performance.
I am sure the K-1 AF is good enough for 99% of use cases.
However, being curious myself, I did a quick and dirty side by side test. AF-S from out of focus into focus in normal store light:
1. K-1 + Pentax 70-200/2.8 at 200mm
2. D500 + Nikkor 70-200/2.8 at 200mm
Where, of course the D500 AF is that of the $7000 D5. I.e., this is an apples to oranges test. OTOH, I did not test AF-C where the D500 should excel.
Both combinations focussed with a noticeable lag, with the lag being 2 or 3 times larger for the K-1. I cannot say if this is from the AF or the lens focus motor. Don't get me wrong: the lag for the K-1 was still ok for most shooting situations. But it is not in the same class as D5/D500.
BTW, in live view, the D500 AF was ridiculously slow