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4. Basic Operation
3.
When set for incident light
1.
You can select extended or retracted lumisphere measuring positions by firmly rotating the
lumisphere retracting ring (UP/DOWN) until it clicks into position.
Extended Lumisphere
2.
When the Lumisphere is extended. (3-D Light Measurement)
This is used to measure people, buildings, and other three dimensional objects.
Measurements are basically made by the method of measuring with the lumisphere aimed in
the camera direction (more precisely, in the direction of the lens axis) at the position of the
subject.
3.
When the Lumisphere is retracted (flat diffuser function)
This is used to measure manuscripts, paintings or other flat copy. It can also be used for measuring
illumination levels (see page 26), or brightness difference (see page 24).
NOTE:
• If the device is used with the Lumisphere retracting ring in a middle position, distributed
light quality will change, and suitable measurements cannot be made.
• Do not push the Lumisphere down manually. Always use the Lumisphere retracting ring.
• If the lumisphere becomes soiled, wipe it with a soft, dry cloth. Organic solutions (paint
thinner, benzene, etc.) must not be used under any circumstances.
-10-
Retracted Lumisphere
(Lumidisc)
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