Hoggy - Yes, thanks, was aware that RAW/fx can be assigned Optical Preview - as said in my previous post - "...Or - can the JPEG switch to RAW + JPEG on the RAW/fx button be assigned to another button so that
can be used for Preview?..."
Problem is - if you do that - to change from JPEG-only to RAW or RAW + JPEG (RAW+ in the K30) - becomes a Menu-list change. If you select RAW + JPEG, but will tend more to use the JPEGs, you only have 8 shots Continuous, not the several seconds available to cover an action as JPEG-only.
The Advanced users will know from their lens type and setting, and target distance from the lens, what the depth of field is - but I certainly don't have that skills-level...!
The K30 - unlike my Canon SX10, doesn't have a Focus-Bracketing function - so can't use that instead to get (at 3 x pre-set-able distances) - "3 bites at the cherry".
With my Fuji HS10 - which doesn't have Focus-Bracketing - I certainly miss it... But then assumed, that all DSLRs would have that.... Oooops....!
That has to go along with other functions my much cheaper and older Bridge cameras have - that I just assumed something as advanced as an up-from-entry-level DSLR would have - and the K30 doesn't.
Jup - If you look at Manual Page 112 - it's apparently the Digital Preview that works in Live-View, and the Optical Preview that works with Viewfinder. Both can be assigned to the RAW/fx button - so you'd have to choose one or other, anyway.
- Perhaps Pentax could contact Fuji, to find out how to put more buttons on cameras - HS10 with 3" tilting LCD.....
(attrib. Fuji Australia.)
Regards, Dave.