F> Actually, though, it is not clear in my mind, but wouldn't IF F> lenses be, in effect, lenses that have floating elements (inasmuch F> as one or more elements move relative to the other elements when F> focusing)? Or, to put it another way, couldn't the term be applied F> to any lens that moves elements (or groups of elements) F> differentially, compared to other elements (or groups)?
F> Fred Yep, I think that IF qualifies. And they also use FREE - fixed rear element and similar designs AFAIK. Good light, Frantisek Vlcek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
