Pentax LX Winder Quick Help/Reference Manual page 8

from the camera.
"S" (Single-Frame) Setting:
If you wish only to use the winder to advance the film after each individual exposure, set the winder
C/S dial to S and press the shutter button: when the exposure is completed, the film advances
automaticaliv to the next exposure and prepares the shutter for shooting. Press the shutter button
again for each additional exposure. (It is not necessary to hold the shutter button depressed for the
duration of the exposure with long exposures.)
NOTE: If the shutter is not cocked when you set the dial to "S" it will be necessary to press the
shutter button twice before you can take the picture: once to cock the shutter (the shutter cocked
indicator on top of the shutter will turn red) and again to release the shutter.
"C" (Consecutive Exposure) Setting:
When you wish to use the winder to capture the action in sequence as it happens, set the dial to "C"
and release the shutter: the winder advances the film continuously in sequence until you let go of the
shutter button or the film runs out. Film advance rate varies in synchronization with shutter operation
and battery condition; synchronization is not featured at the "B" shutter speed setting~ When shutter
speeds in excess of 1/60 sec. are used the top film advance rate of 2 frames-per-second is possible.