--- Robert <[EMAIL PROTECTED]> wrote: > > I purchased a EF300F2.8L USM ver III in Japan in 1998 for $2600 new. > In > Japan they had ver I, ver. II, and ver. III. They told me that the > later > versions were optically the same only the AF speed software had been > changed.
The AF algorithm is in the camera not the lens. The camera's program sends the commands to the lens. What makes AF faster on the lense's side is the AF motor, the number of elements and weight that has to be moved, etc. While I am not absolutely sure about it I don't think anything has changed in that regard. Maybe cosmetics and some other minor things have changed. Maybe in Japan they did give new version numbers for that but not in the US. Anybody has more insight in that? Robert __________________________________________________ Do You Yahoo!? Check out Yahoo! Shopping and Yahoo! Auctions for all of your unique holiday gifts! Buy at http://shopping.yahoo.com or bid at http://auctions.yahoo.com * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
