What
is the difference between each f stop setting?
The difference between f stop settings is one stop.
This
refers to the difference in the amount of light transmitted through
the lens as the lens aperture
is moved from one setting to the next. This difference in
the amount of light from one stop to the next, is either twice
or half as much light depending upon the way the aperture is moved.
For
example, twice as much light reaches the film, or CCD, if the aperture
is moved from f11 to f8. As mentioned, the difference between
settings is one stop.
And
conversely half as much light reaches the film when the aperture
is moved from f 8 to f11.
Open
or wide apertures |
stopped
down or closed apertures |
f
stop
setting
|
f2
|
f l.4
|
f2
|
f2.8
|
f4
|
f5.6
|
f8
|
f11
|
f16
|
f22
|
f32
|
f45
|
f64
|
f90
|
units
of
light transmitted
|
8192
|
4096
|
2048
|
1024
|
512
|
256
|
128
|
64
|
32
|
16
|
8
|
4
|
2
|
1
|
Notice how the units of light
doubles from one aperture to another as we move from f90 to f2.
How
does aperture affect depth of field?
How are the f stop numbers worked out?
What is the difference between each f stop
setting?
|