I use center point with AFS as well with AF linked to AE. I tried both linked and unlinked. No noticeable difference. My Nikon takes less than 1 sec to lock focus but the Pentax takes more than 1.5 secs hunting and locking. Having said that, it's under dim light, I have to try with the adequate light situation. What ive read that the AF speed plunge in dim light compared to bright. I shoot lots of pics under dim light which a reason why i got the Pentax. Shake reduction for prime
For that purpose im very very satisfied. No more handshake blur. Any advice in regards of good prime lens under $400? Got the 50mm 1.8. Dun really know how that lens par with the rest, first time Pentax user here.