Place the yellow lever in front of the lens attachment mark, such as the red dot on the Canon models.
Then, firmly surrounds the zoom ring with the rubber band and press the locking hooks into the most suitable notches for the Fingazoom adheres perfectly to the lens.
It then remains to install the lens on the camera to use the Fingazoom!
The Fingazoom may also be installed on the focus ring. It is even possible to combine two Fingazooms on the same lens: one being placed on the zoom ring and the other on the focus ring.