I'm really loving the K-1 and the autofocus is pretty darn good in good lighting conditions (tending to favor accuracy over speed which I like). I am however facing issues finding a way to auto-focus in lower light situations. This is really important for wedding photography and event photography (both things I do).
I started off my quest for good low light auto focus by renting the
Amazon.com : Pentax AF540FGZ II Flash for Pentax DSLR Cameras : On Camera Shoe Mount Flashes : Camera & Photo. While the flash itself worked wonderfully,
I found that under many circumstances the autofocus took .5 to 2 seconds to lock on. This was in sub-optimal lighting conditions but with people posing just a few feet in front of me, nothing that should be too difficult with an af assist beam. My intuition was that the af beam on the 540 wasn't that great, or that the camera itself was not turning the af assist beam on under circumstances when it thought it could manage. I did see the af assist beam come on from time to time but not always.
Suspecting that perhaps the 540 af beam wasnt that great I ended up purchasing the metz 52 af-1. I then found out that the af assist beam simply doesnt work in concert with the k-1. It's fully incompatible. This leaves me with the built in AF illuminator.
Comparing to my nikon d3100 plus the sb-700 (pretty basic flash) the difference is literally night and day (pun intended) and the nikon d3100 is a pretty basic camera.
I am concerned that there is simply something wrong with the k-1's algorithm for enabling the af assist beam ...
Has anyone else had better results than me and under what circumstances?
Thanks!
-Lars
[Update] - I always set the camera to spot focus (center spot) and use AF-S.
Last edited by larsbars; 12-10-2016 at 02:59 PM.
Reason: Additional Information.