User manual

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APPENDIX
www.hasselblad.comCONTENTS907X 50C USER GUIDE
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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
Aperture
1 2 4 8 16 32 640.7 1.4 2.8 5.6 11 22 45
12.2 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 you press AE-L in manual exposure mode and rotate either
or both thumb 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 : EV12
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-eld 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 expo-
sure. As a start you can use the following guidelines.
Scene EV Value @ISO100
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
The table shows EV values for ISO 100. If you use another ISO
setting the EV value should be modied as follows:
ISO200: EV +1
ISO400: EV +2
ISO800: EV +3
Etc.
More information here: https://en.wikipedia.org/wiki/Expo-
sure_value