What AF Tele-converter would you recommend for use with the Pentax SMC Pentax-F 1:3.5-4.5 28-80mm and Takumar-F 1:4-5.6 70-200mm Auto Focus lenses.
I currently have a Vivitar MC 2X [PK-A/R-PK] Tele Converter and an Izumanon X 2X Auto Tele Converter [PK]. Neither of which work with AF lenses. James
