Lesson 3/Learning Event 4
Relative size of various f/stops
a. Changing from one f/stop to the next will either double or half the
intensity of light passing through the lens.
Thus f/8 allows twice the
amount of light as f/11 and half the amount of light as f/5.6.
b. As with shutter speeds, f/stops have the same halving and doubling
effect on the amount of light. Shutter speeds control the duration time and
f/stops control the intensity of light.
Table 3-2) demonstrates the
different values of light intensity relative from one f/stop to another.
Table 3-2. The increase or decrease of light
intensity from one f/stop to another