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[2] Illuminance and shutter speed
The illuminance provided by the lighting equipment and the shutter speed must be set within the
proper range.
- The following graph shows the relation between illuminance and shutter speed for the IV-S20L16
camera lens (focal length 16 mm) with an aperture setting of f = 1.6.
Determine the proper amount of illuminance and the correct shutter speed, by referring to this
graph. Adjust the aperture as necessary.
- To measure a moving object, or to increase the image processing speed, set the shutter speed to 1/
1000 sec. or 1/2000 sec. or faster. However, an extremely high shutter speed will require intense
lighting, thereby increasing the cost.
Relation between illuminance and shutter speed [IV-S20L16 camera lens
(focal length 16 mm) with an aperture setting of f = 1.6]
Illuminance (lux)
32000
16000
8000
4000
2000
1000
500
250
125
1/30
1/60
Note
- The standard relationship between illuminance and shutter speed is given above for
reference. When actually installing the equipment, make sure the proper combination is used
for the actual system.
Proper range
(shaded zone)
1/125
1/250
1/500
6-3
Installation Conditions and Method
1/1000
1/2000
1/4000 1/10000
Shutter speed sec.
6
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