: A Canon exclusive that allows you to instantly toggle between any two pre-set zoom positions at the touch of a button. This is typically used to zoom in instantly to check focus before returning to your original frame.

Note: The “B4” in the model number indicates it uses the industry-standard B4 mount for 2/3” broadcast cameras.

Before we dive into the manual specifics, it is worth understanding what this lens is. The "YJ" series denotes Canon's standard professional ENG/EFP lenses. The breaks down as follows:

Hundreds of users download the manual to adapt this lens to Sony E-mount, Canon RF, or Micro Four Thirds (MFT). Here is what the original manual doesn't tell you about modern adaptation.

Includes a macro ring (behind the focus ring) for extreme close-up shooting. Iris Control:

Iris control signals and "Record" start/stop from the lens grip. Zoom and focus position data for remote demand controllers.