Pentax LX LX Manual - Page 18

SETTING THE SHUTTER DIAL To set your Pentax LX for automatic exposure control, rotate the shutter dial until the word "Automatic" locks into place opposite the index mark as shown. When manual control is desired, press the shutter dial lock release and turn the dial until the speed setting you wish to use aligns with the index at the click-stop position. Indices on the dial from "2 0 0 0" to "2" represent fractions of a second (i.e., 1/2000th second to 1/2 second) while "1" through "4S" represent full second increments. The "X" index setting corresponds to 1/75th second for synchronization with electronic flash units not providing "dedicated" flash capability with the LX camera (see page 37). Electronically-Controlled Shutter Speeds Your Pentax LX provides electronically-controlled stepless shutter speeds in the "Automatic" mode from 1/2000th second down to 125 sec. (At ASA/ ISO 100, f/1.2) and electronically-controlled manual shutter speeds from 1/60th second to 4 full seconds. These speeds are not functional without batteries or when battery failure occurs. Mechanically-Controlled Shutter Speeds At shutter speed settings from 1/2000th second to "X" and at the "B" (Bulb) setting, the shutter operates mechanically without the need for battery power. These speed settings should be used in the event battery failure interrupts normal camera operation. s 0 ist)1 8 INN AUTOMATIC St • . 0,9 44 Nulfv--li -A- • 16