On Mar 30, 2008, at 12:01 PM, William Robb wrote: > The extra stop of speed is a nice complement to the high ISO > support. That extra stop gives the > auto focus a lot more to work with. ...
If and only if the lens maintains the same or better contrast wide open. I found that AF speed and accuracy with the FA20-35/4 was superior to what I saw with the FA31 Limited ... presumably because the FA20-35 wide open was more contrasty than the FA31 wide open. Conjecture but it seemed borne out by other lenses as well. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
