Mmmm, feeling very stupid now
Been using the K100D & *ist for differnet things and you sort of forget which one is which after a while.
Begin to figure most things are the same, but not quite !
Been going through the custom menus trying to work out the difference is between the two.
Pretty obvious when it dawns on you....*istDL only does the optical preview in the viewfinder and not digital like the K100D.
Cause I use them all the time I would have bet money the *ist did the digital preview ...not the case
Might also have helped if I read the manual too ! Real men don't read instructions do they ???