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

The Canon YJ18x9B4 is a high-quality lens designed for professional cinematographers and broadcasters. With its exceptional optical performance, impressive zoom range, and robust build quality, this lens has become a popular choice among industry professionals. However, to get the most out of this lens, it's essential to understand its features, operations, and maintenance. In this article, we'll provide a comprehensive guide to the Canon YJ18x9B4 manual, covering everything from basic operations to advanced techniques.

On a Micro Four Thirds camera (2x crop), this lens becomes a massive telephoto:

Essential for maintaining focus throughout the zoom range. Located near the mount, it usually involves loosening a thumb screw and rotating the back focus ring while aimed at a Siemens star chart or distant object. Macro Function:

If you need a specific screw or washer, look for a "broken" YJ18x9B4 donor lens on auction sites. It is cheaper than buying individual Canon service parts.

maximum relative aperture, excellent for low-light field work.