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6. STANDARD ACCESSORY OPERATION
•
Illuminance (Lux) measurement
a. Mount Limidisc @3 to light sensor w in the same manner as
Lumisphere.
b. Place Lumidisc @3 parallel with the light source.
c. Press stopper button !3 and read meter scale footcandle indica-
tion e.
d. Multiply this value by 10.76 to obtain lux.
Example:80 x 10.76 = 860.8 lux
If meter deflects beyond scale, insert High slide @2, then
multiply footcandle indication by 32.
Example:80 x 32 = 2560 footcandles
2560 x 10.76 = 27545.6 lux
Reflected Light Measurement
1.Lumigrid
a. Mount Lumigrid to light
sensor w in the same man-
ner as Lumisphere q. (See
P.8)
b. Set sensitivity value of em-
ployed film. Setting is per-
formed in the same manner
as for incident light measure-
ment. (See P.8)
c. From camera position, point
Lumigrid @4 directly toward
part of subject to be mea-
sured.
d. In case of measuring narrow
areas, as close as possible to
the subject, measure re-
flected light from main point
of subject. Use adequate care
at this time that meter shadow
etc. does not interfere.
@4
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