Sekonic L-358 - Manual (Page 31)

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6. Advanced Functions
6. Flash analyzing measurement function
When measuring flash light, the shutter speed and F stop value (value combining ambient light and
flash light: total amount of light) are displayed in the liquid crystal display and the ambient light and
flash light are each displayed as separate values together with the total amount of light on the
analog scale. In addition, the ratio of flash light to the total amount of light is displayed at that time
as a value in 10% steps. It is possible to use this value for adjustments, for example, when
photographing with a flash in a room illuminated by tungsten lamp light, to emphasize or weaken the
tungsten lamp (ambient) light element (enhancing the flash light of the photograph) to match the
photographer's intentions.
< Example >
If, under certain conditions, the flash light component is
60% and the tungsten light component is 40%, the display
will be as indicated at the right.
Flash reading on the analog scale is blinking.
1. To emphasize the tungsten (ambient) light (to imbue
the atmosphere with orange-colored tones)
To increase the ratio of tungsten light, use the Jog
wheel t to change the shutter speed to a slower
setting.
It is apparent that the flash light component is now
20%. The analog scale also shows the tungsten
light component to be about 2.5 stop higher than
the flash light component.
As a result, images on the film are expressed with
orange tones that give life to the effect of the
tungsten light.
2. To reduce the effect of tungsten light (to realize a
more natural atmosphere)
To decrease the ratio of tungsten light, use the Jog
wheel to change the shutter speed to a faster setting.
It is apparent that the flash light component is now
80%. The analog scale also shows the flash light
component to be about 1.5 stop higher than the
ambient light component.
As a result, the images on the film are expressed in
natural color tones.
The settings above are made by adjusting the tungsten (ambient) light by the shutter speed. It
is also possible to modify the ratio by adjusting the flash light (when changing the distance
between the flash and the subject or when changing the amount of light of the flash). When
using this method, re-measure each time the flash light is adjusted.