Originally posted by jct us101
I have NEVER understood the point of digital preview. I don't even think that I have used it on my Pentax cameras. It's the little aperture thing that you can slide your on and off switch to, right?
Agreed. The thing that makes the Digital preview useless is that it is no different than just taking the picture and reviewing it. Don't like it? The delete button is right there. Don't want to fool with the Delete button? All computer file browsers have a delete function that moves them to a trash bin. Want them back at some point? Restore usually works pretty well.
My cameras have always been and will always be set for DOF preview. To me it is useful when I want to make sure a given area is in reasonable focus. It takes a split second for me to decide, and if I don't like it, reshoot.
WRT, Autofocus in Live View. I don't know about the Kx but on the K7, the AF button does the autofocus with the shutter open and the view full on the rear screen. It is a painfully slow way to auto focus however because, most of My lenses, hunt full range before settling on a focus point. This isn't the case with regular AF via the view finder. LV is most useful for critical focusing as you can zoom in a good bit (digital zoom) to assist with Manual focus.
I wouldn't base my decision on LV of any DSLR. The mistake many make (IMO) coming from P&S cameras, is assuming they need that rear screen. Your best bet is to learn to use the viewfinder you're paying the money for, and learn to catch your subject. The two types cameras are in completely different leagues.