Brightness Control
You can set the amount of brightness you want by turning the aperture adjustment ring when using your lens.
When you turn the aperture adjustment ring between 22, 16, 11, 8 and 5.6 you are making 1 stop each turn. There are 1.5 stops between 5.6 and 3.5. Brightness can be set more precisely by making half stops as well (see below).
5.6 and 8 are 1 stop apart (1EV). | Set a 0.5 stop (0.5EV) between 5.6 and 8 |