Ricoh A12 Benutzerhandbuch

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S: Shutter Speed Priority Mode
If [Auto] or [Auto-Hi] is selected for the ISO setting, the exposure will be 
adjusted to the proper exposure within the ISO range while the camera is in 
shutter speed priority mode.
M: Manual Exposure Mode
If [Auto] or [Auto-Hi] is selected for ISO Setting, ISO will be fixed at 200 
while the camera is in manual exposure mode. 
You can select between B (Bulb) and T (Time) for the shutter speed. 
With B, the image is exposed while the shutter release button is pressed 
and exposure ends when the button is released. With T, exposure starts 
when the shutter release button is pressed and ends when it is pressed 
again. In either mode, the camera stops shooting compulsorily once 180 
sec. has elapsed. 
 Note --------------------------------------------------------------------------------------
B and T can both be operated using the optional cable switch (CA-1).