On Sun, Apr 12, 2009 at 07:14:34AM -0600, William Robb scripsit: > ----- Original Message ----- From: "Thibouille" >> The 55/1.4 id known to a bit slow to focus, although it is very >> precisewhen it locks. >> >> At the same time, this is supposed to be a portrait lens, so I'd say >> I'd better have it AF well rather than fast. >> Still, could be faster, indeed. > > I hate to say it, but the big boys in the sandbox seem to be able to get > fast and accurate out of their AF systems.
Generally at the cost of the manual focus, though, and so far as I can tell (never having had my hands on one), the 55/1.4 is effectively a manual focus lens with a very long focus throw that happens to have had an SDM auto-focus motor included. Which is one of those design decisions you could certainly wish they publicized more. -- Graydon (or it's just the SDM motor is one size too small...) -- 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.
