Brightness Control
You can set the amount of brightness you want by turning the aperture adjustment ring when using your lens.
[Aperture adjustment ring markings]
When you turn the aperture adjustment ring between 22, 16, 11, 8, 5.6, 4, 2.8, 2 and 1.4 you are making 1 stop each turn. 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 |