Canon Yj18x9b4 Manual Top | SECURE ⚡ |

Houses the servo motors, rocker, and connection cables. Setup and Mounting Instructions Mounting to a 2/3-Inch Camera Turn off the camera power. Remove the rear lens cap and the camera body cap.

Canon YJ18x9B4 KRS SX12 Broadcast Lens Manual The Canon YJ18x9B4 is a classic 2/3-inch broadcast lens. It is widely used for electronic news gathering (ENG) and field production. This manual outlines specifications, setup steps, operation, and troubleshooting. Technical Specifications 18x Focal Length: 9.0mm to 162mm Maximum Aperture: f/1.8 (9mm to 115mm), f/2.6 (162mm)

Before diving into technical execution, tracking the baseline physical and optical characteristics of the Canon YJ18x9B4 KRS/IRS series provides proper parameter context: Technical Metric Factory Specification 18x Optical Zoom Focal Length Range 9mm (Wide) to 162mm (Telephoto) Maximum Relative Aperture f/1.8 (9mm to 114mm) / Ramping to f/2.4 at 162mm Format Coverage 2/3-inch Sensor Size (B4 Bayonet Mount) Focusing Mechanism Internal Focus (IF) Technology Minimum Object Distance (M.O.D.) 0.8 meters (approx. 2.6 feet) Front Filter Thread Diameter 112mm / 82mm inner thread variations Anatomy of the Lens Ring Assembly canon yj18x9b4 manual top

The front of the lens remains stationary during focusing, which prevents filter rotation and reduces chromatic aberration. Parfocal Design:

Manual ring with a removable lever for focal adjustments. Houses the servo motors, rocker, and connection cables

: Gently tighten the rear back focus thumb screw clockwise to secure the flange mechanism. Avoid overtightening, which can strip the fine alignment threads. Managing the Manual and Servo Interface

Beyond standard broadcast work, the YJ18x9B4 is a favorite for creative experimentation. Canon YJ18x9B4 KRS SX12 Broadcast Lens Manual The

Approximately 1.2kg to 2.3kg depending on the specific drive unit (KRS vs IRS). Key Operational Features Internal Focusing (IF)

: To shift from servo zoom (rocker control) to fully manual zoom operation, locate the zoom mechanical engagement knob or lever situated on the underside of the electronic drive grip. Disengage it to release the internal motorized clutch.

: Do not touch the main front focus ring. Instead, slowly rotate the rear back focus ring until the wide-angle image becomes perfectly sharp.

The "SX12" or "KRS/IRS" drive unit provides both manual and electronic control options: