Pentax LX LX Manual - Page 36

SHOOTING WITH TTL INTEGRATED AUTOMATIC FLASH UNITS Ni AX 0 ' ' EN TA 200 1000 500 250 125 X 00 30 15 4 2 1 2s LT D • 34 When used with the Pentax AF200T, AF280T, AF400T and AF080C Ring Light Automatic Electronic Flash models, your Pentax LX provides the ultimate in electronic flash versatility. Because these units offer fully integrated operation with your camera's IDM through-the-lens light measurement system, the camera meter reads both ambient lighting and electronic flash to assure proper exposure of any subject within the unit's operating range, regardless of the aperture set on the lens. In addition, the integrated metering system allows the non-flash automatic exposure system to override flash when flash exposure is not needed to eliminate flash exposure failures even in changing lighting conditions. The integrated flash operation with the LX also eliminates the need for exposure compensation when using filters or close-up accessories. With the AF280T and AF400T it allows you to take full advantage of bounce flash capabilities while retaining through-the-lens flash control, and with the AF080C through the lens metering enables unprecedented convenience for close-up work and macrophotography. Auto Flash Sync/Viewfinder Ready Light After making the proper connection for flash operation (i.e., by attaching the AF200T or AF280T to the LX hotshoe, the AF080C Control Pack to the hotshoe, or the 4P Sync Cord for the AF400T to the X sync terminal on the camera body), set the flash unit for TTL AUTO operation and leave the camera's shutter dial set for "Automatic". After you switch the flash on, the camera will automatically synchronize the shutter speed at 1/50 sec. for flash and illuminate the viewfinder LED at "X" as a visible ready light.