New Firmware for Pentax cameras.
Applies to K1, K1ii, KP, K70 and K3ii. Full details, including link, here: https://www.facebook.com/pentaxeurope/posts/4496601153703227
Not really useful for people that don't have facebook.
Alternatively just click on the link I originally posted.and then click on your camera.
. My Flickr
+ K-3 , I just did mine.
All those updates also improve stability and fix bugs.
For my part, I suspect they stopped fixing K5 firmware bugs a long time ago.
Never-the-less hoping for a "D500" style AF update.
🤣
Peter
Pentax K5
Pentax DA 18-55 Mk1, 50-200 (Samsung), 16-45, 55-300 Mk1, 35 f/2.4
Pentax MZ6 + FA28-90, FA50 f/1.4, M 50 f/1.7
Tamron 80-210mm & 28mm
Pentax hybrid user - Digital K3 & K200D, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X digital
Fan of DA limited and old manual lenses

Never-the-less hoping for a "D500" style AF update.
🤣
On Pentax forums a lot of people are saying it's done just that. I installed it on my k1 and it's made no difference that I can see.
Note that my Pentax is a K5 that I will have had 10 years in May.
So, not having the 1.4x converter and in view of camera age, not expecting any noticeable improvement.
Credit though for publishing an update for a camera of that age.
Peter
Pentax K5
Pentax DA 18-55 Mk1, 50-200 (Samsung), 16-45, 55-300 Mk1, 35 f/2.4
Pentax MZ6 + FA28-90, FA50 f/1.4, M 50 f/1.7
Tamron 80-210mm & 28mm
Credit though for publishing an update for a camera of that age [K-5].
They haven't, this update is for K-3 II and newer. The K-5 is unaffected.
Oops!
Saw the long list of cameras at Mike's link with the K5 present, but on closer inspection it is with v1.16 from March 2014!
Peter
Pentax K5
Pentax DA 18-55 Mk1, 50-200 (Samsung), 16-45, 55-300 Mk1, 35 f/2.4
Pentax MZ6 + FA28-90, FA50 f/1.4, M 50 f/1.7
Tamron 80-210mm & 28mm
Mike-P
Member
Hampshire UK
Optimized focus operation for new lenses HD PENTAX-FA 31 mm F1.8 Limited, HD PENTAX-FA 43 mm F1.9 Limited, HD PENTAX-FA 77 mm F1.8 Limited lenses and smc PENTAX-FA 31mm F1.8AL limited, smc PENTAX-FA 43mm F1.9AL limited and smc PENTAX-FA 77mm F1.8AL limited lenses.
*When this update is done, the contents of version 1.53 and earlier will be also updated.
LINK
. My Flickr