Pentax 280T Operation Manual - Page 20

Auto Flash Exposure Check Pre-exposure checks for the auto flash range cannot be made with the flash mode selector set at rrsl TTL Auto as the sensor is inside the camera. However, if the aper- ture you select is the same or wider than the aperture indicated by the red or green marks, you can make an approximate check by moving the mode selector to either the red or green Two-Level Auto flash setting (whichever is appropriate) and pressing the test button. If the subject is properly exposed, the A. CHECK lamp will light. Turn the lever to the TTL Auto mode setting before making the actual exposure. • When the subject is closer than the auto operating range or white or black even in the auto operating range, the Auto Flash Exposure Check function may not properly work, due to reflectance. In such a case,' use the M or MS mode by referring to the flash control panel. Viewfinder Auto Exposure Confirmation On TTL Auto, the AF-280T 250 signals confirmation inside 125 the viewfinder after the picture is taken ensuring that your X 50 30 subject received adequate flash 15 exposure. Immediately after a properly exposed photo on TTL Auto, the view- finder flash ready indicator flickers. If the indicator does not light, additional distance or aperture adjustments are required. The viewfinder signal can be turned off with the FINDER A. CHECK switch on the back of the flash. •When this flash is used on Pentax cameras featuring a TTL flash metering system (except the LX), with its A-, F- or FA- lens set at the "A' position, the programmed f-stop will be automatically set as soon as the flash is fully charged. 18