I came across a little stash of Pentax K mount lenses, including a Cimko 28mm f2.8 that looks like it may be a solid piece of glass. Lacking a K mount adapter, I started browsing eBay for one and came across a tilt adapter. I'm intrigued by this. I think I would like to try tilt shift photography, but I wonder, are such adapters any good? The one I'm looking at supports 8 degrees of tilt. Is this enough?