Pentax Program Plus Program Plus Manual - Page 59

USING SCREW-MOUNT TAKUMAR LENSES Conventional screw-mount lenses can be easily attached to the lens mount of your camera by using the optional Mount Adaptor K. But there are some limitations. • Put the Mount Adaptor K in the body mount by matching both marks. • To lock it, rotate the adaptor clockwise (65° ) with a pointed object such as a ball-point pen. Now your camera can accept any conventional Pentax screw-mount lenses. • To remove the adaptor, press the spring pin on the adaptor with some pointed aid and rotate it counterclockwise until it stops. Limitations in using screw-mount lenses on this camera • The distance scale of the lens is usable as it is, up to infinity ( I. • Automatic diaphragm coupling doesn't function due to the difference in coupling system. • The exposure is metered with aperture stopped down. • Programmed AE mode cannot be used with screw-mount lenses. • There is not automatic aperture setting even with dedicated flash units. /PEN -TAX /PENTAX -rA SELF 550