K-5/K-r Firmware Changes Confirmed
Only GPS-related updates
By PF Staff in Firmware Updates on Jun 21, 2011
A similar update has just been released for the 645D as well, although it won't support the "Astrotracer" function as it lacks the sensor Shake Reduction mechanism.
The latest Pentax DSLR firmware versions can always be found on our DSLR comparison page.