Sekonic L-758DR - Manual (Page 39)

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2. Turn any secondary light source off. Point the
Lumisphere toward the main light source, from the
position of the subject and take a measurement. Press
the Memory button
and store the value in memory.
3. Press the AVE./
∆
EV button and display the “A”mark
on the LCD indicating a standard value.
4. Turn the main lighting off. Now, point the Lumisphere
toward the secondary light source. While pressing and
holding the Measuring button
, the indicated
difference between the main and secondary light
source is displayed in EV. At the same time, the
standard value and a new measured value are
displayed on the analog scale.
5. The Standard value can be cleared by pressing the Memory clear button @3 , or AVE./
∆
EV
button.
Reference:
• To determine exposure after adjusting lights, turn both main and secondary light sources
on, raise the Lumisphere to the mark position, then take a reading with the Lumisphere
aimed in the direction of camera's lens axis in incident light.
• This function can also be used for reflected light.
• You can select aperture scale or latitude scale by holding Mode button
and pressing
AVE. /
∆
EV.
2 : 1
3 : 1
4 : 1
8 : 1
16 : 1
EV difference of
∆
EV value Contrast ratio
1
1.5
2
3
4
6. Advanced Functions
Memorized
f stop value
Set shutter speed
Contrast in
EV
f stop value
being measured
Indicator of reading
Memory button