Operation Manual
23
4-2. Setting Light Receiving System
4-2-1.
Measuring with Incident Light Function (Lumisphere Extended /Retracted)
Use either extended or retracted (at) lumisphere
to measure incident light. Point the lumisphere at
the camera (lens optical axis) from a position close
to the subject and then measure.
1. Extending Lumisphere
Rotate the Lumisphere retracting ring
2
to
align the mark with the extended symbol (
)
on the meter head.
2. Retracting Lumisphere
Rotate the Lumisphere retracting ring
2
to
align the mark with retracted symbol (
)on
the meter head.
Lumisphere alighining mark
Lumisphere
retracting ring
2
Lumisphere
retracting ring
2
Extended ( ) Retracted ( )
Lumisphere Extended Lumisphere Retracted (at)
Lumisphere Retracted (at)
Retract lumisphere when measuring at subjects
such as manuscripts, books, pictures, green
screens, or when measuring lighting ratio
(Contrast function) (see P50 for details) or simply
measuring intensity of illumination (see P28 for
details).
,
•
Try to minimize the inuence fo the person taking the light measurements. (Do not obstruct the light sources. ere
will also be reected light from the person’s clothing, so do not allow this reected light to enter the light receptor.)
•
If the light meter 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 down the lumisphere with your hand.
•
Because it may aect the precision of the measurements, be careful not to damage or dirty the Lumisphere/Light
receptor. When Lumisphere becomes dirty, wipe it with a dry, soft cloth. Never use organic solvent such as thinner or
benzene.