Pentax 280T Operation Manual - Page 14
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:11N0-LEVEIZAUTC*FLAW OPERATION The AF 280T offers Two-Level (high/low) auto flash operation via the flash unit's built-in sensor with ail cameras featuring hotshoe synchronization. 1) Set the ASA/ISO film speed of the film in your camera in the ASA/ISO window of the flash unit control panel (see page 7). 2) Set the camera's shutter speed/control dial to the proper synchronization mode (pages 10 - 11). 3) Set the mode selector lever on the flash control panel to either the RED or GREEN Auto setting in accordance with the adjacent chart. Either mode may be used for the lm - 3.5m operating range; with subjects closer than 1m, however, the GREEN setting must be used to obtain the proper exposure. Conversely, for subjects beyond 3.5 meters the high output RED mode must be used. TTLAImi Lur'Eml s 0 •When used with Pentax cameras having a programmed AE function with the aperture ring of th lens set at A, the aperture is automatically set to the programmed f-stop on completion of the charging. TTL AUTO iMr-St ( H L M I A.CHECK 12