Pentax ES ES Manual - Page 17

OPEN-APERTURE OR STOP-DOWN READING With the new Super-Multi-Coated (SMC) Takumar lenses with an open-aperture reading pin (1), mounted directly on the ES camera body, the TTL meter reads exposure through the fully-open aperture or stopped-down taking aperture for correct automatic exposure. For open-aperture reading, the stop-down lever should be DOWN; for stop-down reading, push up the lever. 0 ! !. A 3 A ry ENT AX With all other lenses, or when using Extension Tubes, Bel- lows Unit or Microscope Adapter, remember always to push 0 up the stop-down lever for stopped-down aperture reading and correct automatic exposure. The SMC Takumar 85mm f/1.9 (photo on top, right) and SMC Takumar-Zoom 85mm -210mm lenses do not have the open-aperture reading pin ®, and therefore, they should be used on the ES for stop-down reading. Also remember that the TTL metering does not work unless the shutter dial is set at "AUTOMATIC". 15