Exposure mode, Exposure mode -66 – Nikon Camera N90 User Manual
Page 73
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EXPOSURE MODE
Light reaching the film is controlled by shutter speed and lens
aperture. The proper combination results in a correct exposure.
Shutter speed and lens aperture settings are based on the ISO
speed set for the film in use and the operation of the camera's
exposure control system.
The relationship between aperture and shutter speed is as
follows: One change in shutter speed either doubles or halves
the amount of light transmitted. For example, a shutter speed
of 1/500 sec, passes half the light of 1/250 and double the light
of 1/1000 sec. The aperture f/8 passes half the light of f/5.6
and double the light of f/11, If the correct exposure for a scene
is 1/500 at f/8, then we can also select 1/250 at f/11 or 1/1000
at f/5,6 and achieve the same exposure results, and so on.
Metering range
(for Matrix and Center-Weighted Metering with AF Nikkor 50mm f/1.4 iens)
OO
II
■ ■
...
EV
0
1
2
3
4
10
11
12
13
14
15
16
17
IB
19
20
21
1.4
4
2
i
i/2
1/4
1/8
1/15
И ЗО
1/80
1/125
1/250
1/500
l/IOOO
1/2000
1/4000
1
/
8Ш
2
8
4
2
1
1/2
1/4
1/8
i/ts
t/30
1/60
1/125
1/250
1/500
1/1000
1/2000
1/4000
1/8000
(Shutter speed)
2.8
li
a
4
2
1
i/7
1/4
1/8
1/16
1/30
1/80
1/125
1/250
1/500
1/1000
1/2000
1/4000
1/8000
4
30
IS
8
4
2
1
1/2
1/4
1/8
1/15
1/30
1/60
1/125
1/250
1/500
1/1000
1/2000
1
/
40Q0
1/8000
5.6
30
IS
8
4
2
1
1/2
1/4
tit
1/15
1/30
1/80
1/125
1/250
1
/
6D0
1/1000
1/2000
1/4000
1/8000
6
30
IS
8
4
2
1
1/2
1/4
1/8
1/15
1/30
1/60
1/125
1/250
1/500
1/1000
1/2000
1/4000
1/8000
11
30
IS
8
4
2
1
1/2
1/4
1/8
t/15
1/30
1/80
1/125
1/250
1/500
1/tOOO
1/2000
1/4000
1/8000
16
30
15
8
4
2
1
1/2
1/4
1/8
1/15
1/30
1/80
1/125
1/250
1/500
1/1000
1/2000
1/4000
I/800D
Metering range depends on the lens in use. With a lens having aperture from f/2.8 to
f/32, metering range at ISO 100 will be from EV1 to EV23.
49