Does anyone here use this camera or any of the other digital *ist range? I'm thinking of getting one mostly because I already have a number of Pentax M lenses that I like. The site says they work, but with restrictions. I'm guessing these restrictions are the obvious no-auto anything. But the site was kind of ambiguous and I'd like to see if anyone here has found any problems with this setup. How well does the camera interface with the older lenses? Thanks.