The "Pentax-A" series lenses are all manual focus. They have the linear-action iris actuator and a special position on the aperture ring allowing a Pentax body with on-body aperture control (all the DSLRs) to set the aperture value using the body controls. They're fully compatible with the DSLR bodies with respect to all auto-exposure modes.
The SMC Pentax-A 28mm f/2.8 lens is a wonderful little lens. It's small and light, slightly soft until stopped down to f/4 but has wonderful bokeh. It was the first Pentax lens I used when I purchased the *ist DS body in 2004. On Sat, Jul 10, 2010 at 1:38 PM, Eric Weir <[email protected]> wrote: > > Really displaying my ignorance here again, but am I correct in assuming this > is an autofocus lens? -- Godfrey godfreydigiorgi.posterous.com -- 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.
