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Automatic adjustment of the range indication<br />
The cameras transmit the flash parameters (e.g. for ISO sensitivity, lens focal<br />
length, aperture, and ambient light exposure compensation) to the flash unit.<br />
As a result, the flash unit automatically adjusts its settings accordingly. The<br />
maximum flash range is calculated on the basis of the flash parameters and<br />
the guide number, and displayed on the monitor.<br />
For this, data exchange must occur between the camera and flash unit, e.g. by<br />
pressing the camera’s shutter release button!<br />
52<br />
Flash synchronization<br />
Automatic flash sync speed control<br />
Depending on the camera model and the exposure mode set on the camera,<br />
the shutter speed is switched to flash sync speed when readiness of flash is<br />
reached (see camera instr.).<br />
Shutter speeds faster than the flash sync speed cannot be set (except with the<br />
flash modes TTL<br />
-HSS and M -HSS, see “HSS high speed synchronization”,<br />
p. 63) and/or are switched to the flash sync speed. In contrast, slower shutter<br />
speeds than the flash sync speed can be used depending on the illumination<br />
mode selected on the camera.<br />
Notes:<br />
• The LEICA R 9 operates with variable shutter speeds in program exposure<br />
mode. They are automatically controlled by the camera depending on the<br />
ambient light and focal length of the lens used (see camera instr.).<br />
• If you want to ensure that the LEICA <strong>SF</strong> <strong>58</strong> can use its full light output, you<br />
should not select shutter speeds faster than 1/125 s .<br />
• <strong>Camera</strong>s or lenses with central shutters have no sync speed, since with these<br />
lenses, any shutter speed can be also be used with flash. As a result, there is<br />
no automatic setting of any shutter speed in this case.
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