JCO wrote: > I am waiting too, where are your estimates > showing their decisions were justified?
Advancing technology justified their decisions. The old lenses were obsolete. The company assumed (correctly) that almost everyone would want autofocus lenses with their new cameras. You don't put model T engines in a Ford Mustang. Lens design technology with aspherical glass, autofocus, internal focusing, non-rotating front elements etc had progressed to the point where the company didn't think it made any sense to use the old glass on the new cameras. They were right. It doesn't make any sense. There may also have been solid engineering reasons for doing so. You don't know what features are built into the modern lenses for compatibility with future cameras. Retro capability may have prevented some other feature (whether ever implemented or not) from being added. I don't know if that's true and neither do you. Only the Pentax engineers know for sure. Tom Reese
