Originally posted by Sagitta With the K-30, turning SR off meant that the camera would not stamp a focal length to the EXIF
With the K-3 as well as (I believe) all SR-capable flagship models that came before it, the focal length is recorded regardless of whether SR is turned on. What's more, the value will default to the last focal length entered unless manually overridden at start-up or from the capture menu. I have made it my practice to always turn the camera off when changing lenses. This has a number of benefits, one of which is that the camera will always prompt for focal length on start-up if a manual focus lens is mounted. It is too bad that the K-3 does not support a value of "unknown", a side effect of which might be to turn off the SR.
Steve
FWIW, I sort of like this behavior. I have a plethora of lenses that do not self-identify and often mix and match within a session. The focal length provides a clue that I can use later for manual edits to the EXIF.