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HSS-High Speed Synchronization<br />
Some cameras support HSS-High Speed Synchronization (see camera instr.).<br />
This flash mode allows using a flash unit even with shutter speeds faster than<br />
the sync speed.<br />
The mode is helpful, for example in the case of portrait shots when a wide<br />
open aperture (e.g. F/2.0) is to be used in spite of very bright ambient light in<br />
order to limit the depth of field! The LEICA <strong>SF</strong> <strong>58</strong> supports high speed synchronization<br />
in TTL -HSS and M -HSS modes.<br />
For physical reasons, HSS-High Speed Synchronization significantly reduces<br />
the guide number and as a result also the range of the flash unit! This also<br />
depends on the shutter speed used – the faster the shutter speed, the lower the<br />
guide number! Therefore, always pay attention to the range indication on the<br />
monitor of the flash unit<br />
HSS-High Speed Synchronization is activated automatically if a shutter speed<br />
faster than the flash sync speed is manually set or automatically adjusted on<br />
the camera.<br />
Setting the function on the flash unit (see also “Menu navigation / setting<br />
the functions”, p. 46, and “Flash modes”, p. 56)<br />
3. Choose the Mode menu and<br />
4. select TTL -HSS or M -HSS from the list.<br />
63<br />
Settings on the camera<br />
See operating instructions of the camera.<br />
Displays on the monitor of the flash unit/ in the viewfinder of the<br />
camera (see also “Displays on the monitor”, p. 45)<br />
– The range (2.5) on the monitor of the flash unit is indicated according to the<br />
flash parameters transmitted by the camera or manually entered on the flash<br />
unit (see “Automatic / manual setting of flash exposure parameters”, p. 54).<br />
– Flash readiness and the results of a flash exposure are indicated in the viewfinders<br />
of all <strong>Leica</strong> cameras listed excluding the LEICA MP.<br />
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