If you move the lens opening by one stop, the light either doubles or decreases by half.
How many stops difference between f/4 and f/22?
|
f/4 |
to |
f/5.6 |
is |
1 stop less light |
|
f/5.6 |
to |
f/8 |
is |
1 stop less light |
| f/8 | to | f/11 | is | 1 stop less light |
|
f/11 |
to |
f/22 |
is |
1 stop less light |
|
Total |
4 stops | |||
Let's look at how Stop is spoken on our last country, Shutter Speed.
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