Operation Manual

Measurement

4-2-2. When “E.u” (Exposure under) blinks on the display

If the darkness is beyond the measuring range

of the meter, “E.u” will blink to indicate that

measurements cannot be made. In this case,

if possible, adjust the ﬂash output power

or move closer to the light source and take

another measurement.

5. Measuring contrast of light

This method is useful for setting brightness levels (ratios) of key, line, hair, and

eye lights for cinematography applications or evaluating studio lighting for Photo

applications. It is also useful to check the evenness of illumination across a subject

area or background such as a green screen.

Mount the Lumidisc accessory

(see page 7).

Turn ON just the main light source.

Point the Lumidisc toward the

main light source from the subject

position and take a measurement.

Next turn ON just the secondary

light source. Point the Lumidisc

at the secondary light source and

take a measurement.

Determine the luminance

ratio (contrast ratio) using the

differrence of measuring values

of the main light source and the

secondary light source.

To determine exposure after adjusting lights, turn ON both main light source

and secondary light source, then take a measurement with the Lumisphere

aimed in the direction of camera's lens axis.

•

Display: HD_CINE mode

EV Difference of

Measuring Value

Contrast Ratio

2 : 1

1.5

3 : 1

4 : 1

8 : 1

16 : 1