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CONTENTS
CFV 100C
User Manual
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EV (Exposure Value)
EV (Exposure Value)
1
0-1-2-3-4-5-6-7-8-9-10
30 m
15 m
8 m
4 m
2 m
1 m
30 s
15 s
8 s
4 s
2 s
1 s
1/2
1/4
1/8
1/15
1/30
1/60
1/125
1/250
1/500
1/1000
1/2000
Shutter Speed
1 2 4 8 16 32 640.7 1.4 2.8 5.6 11 22 45
5.6 EV VALUE
The EV value (Exposure Value) represents a
combination of aperture and shutter speed
where all combinations giving the same
exposure will have the same EV value.
As an example:
f/5,6 - 1/125s and f/4 - 1/250s has the same
EV value = 12.
If the users press AE-L in manual exposure
mode and rotate either or both scroll
wheels, aperture and shutter speed will
change, but the EV value will remain the
same.
A change of the EV value by one is the same
as changing aperture or shutter speed by
one stop.
Examples:
f/5.6 - 1/125s: EV 12
f/8 - 1/125s: EV 13
f/5.6 - 1/250s: EV 13
It is important to understand that although two images that were made using the same EV value
but with different combinations of aperture and shutter speed will have the same exposure but
will not be identical due to different depth-of-field and movement stopping time.
As the EV value is related to the lighting conditions, it can in many cases be an easy way to
quickly set the correct exposure. As a start users can use the following guidelines.
Scene EV Value @ISO 100
Light sand or snow with clear shadows 16
Outdoor scene in direct sunlight 15
Outdoor scene, Cloudy no shadows 13
Outdoor scene in shadows, clear sunlight 12
Sunset 12
Night scenes in city lights 7-8
Indoor, home 5-7
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