WEll my Simga 70 to 200 f2.8 will not auto focus and it uses the the contacts. Maybe Pentax's contact system is not as good as Nikon or Canon....My 2 cents worth...Joe
----- Original Message ----- From: "Bruce Dayton" <[email protected]> To: "Pentax-Discuss Mail List" <[email protected]> Sent: Thursday, January 21, 2010 2:24:38 PM GMT -05:00 US/Canada Eastern Subject: Re: SDM Failure Ouch! My Sigma 100-300/4 EX lens has been used for well over 30,000 frames almost all with AF - no problems - it uses the screwdriver method. I have not pushed the SDM on either of my DA* zooms like that so don't know about reliability. I'm hoping it is ok. -- Best regards, Bruce Thursday, January 21, 2010, 11:19:42 AM, you wrote: WR> Well kids, my 60-250 appears to be in the early stages of AF Crapola. WR> It's worked hard for me, sitting in the gadget bag. I've probably used it WR> less than half a dozen times. WR> William Robb -- 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. -- 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.
