On Wed, 22 Nov 2006, Bruce Dayton wrote: > Along with that, the F version is a two touch, the A is a one touch. > So for the A, you focus and zoom at the same time. For speedy zoom > and focusing, this is much better. But it can cause problems with > zoom creep when on a tripod and hands off. The F lens has a ring for > focus and a ring for zoom. > > One big issue is whether you need/want AF or not. Only the F has AF. > FWIW, I have the A 70-210/4 and am very happy with it.
I generally don't mind MF lenses, and frequently MF AF lenses. However, I found the A to be far too heavy and unwieldy to focus and zoom, and replaced it with the F. AF is effectively another hand for me. Mid-range long zooms were a 15-year problem for Pentax, until the 50-200 came about. The few of us still using film still have the same problem. Kostas -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
