Pentax SF-1n SF-1n Manual - Page 52
Pentax SF-1n Manual
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B (BULB) AND 125 (1/125 SEC.) SETTINGS 11 ► fIII 11 JJ Select the "B" (bulb) or "125" (1/125 sec.) setting by sliding the select switch to the I.1 or Iv) position while holding the mode/drive switch at the MODE position. The appropriate indicator will appear on the CENTIC panel. When you press the shutter release button half-way down, the indicator "M" will appear in the viewfinder. (When the aperture is set at any f-stop other than A) Using the "B" (Bulb) Setting Use this setting for long-time exposures of subjects such as fireworks and night scenes. The shutter remains open as long as the shutter release button is held down. • When using the bulb setting, stabilize the camera with a solid tripod and connect the optional Cable Switch F (with a lock mechanism) to the camera's release socket, as illustrated. • 50 • With one fresh 6V lithium battery or four fresh "AA"size alkaline batteries, a long-time exposure of approximately 10 hours is possible under normal temperatures. Using the "125" (1/125 sec.) Setting This setting is used for flash photography using a general clip-on type flash unit with a fixed shutter speed of 1/125 second. • When using a general clip-on type flash unit, the aperture must be set manually with the lens aperture ring according to the ISO speed of the film in use, the distance to the subject and the flash's guide number. (See the operating manual of the flash unit concerned.)