f/1.8 (at 9-114mm), ramping to f/2.7 at 171mm (for similar YJ series models). Minimum Object Distance (M.O.D.): 0.6 meters.
The (IRS/KRS) is a professional 18x zoom lens designed for 2/3-inch B4 mount cameras, primarily used in SDTV news gathering and field productions. While officially categorized as a Standard Definition (SD) lens, it is highly regarded for its lightweight design (approx. 1.2kg to 2.3kg depending on the specific model and accessories) and sharp internal focus (IF) system. Core Specifications Focal Length: 9mm to 162mm. Zoom Ratio: 18x.
Essential for ensuring the lens remains parfocal (stays in focus throughout the zoom range). canon yj18x9b4 manual top
Approximately 1.2kg (KRS) to 2.3kg (standard assembly). Lens Mount: 2/3-inch Bayonet (B4). Manual & Operational Highlights
According to operational guidelines, the lens features several user-centric designs: While officially categorized as a Standard Definition (SD)
For full technical documentation, users should refer to the Canon User Manual Library or Canon UK Support by searching for "YJ18x9B4" or the associated camera system. Canon YJ18x9B4 IRS-A SX12 1.8 B4 Lens Test - Vimeo
It supports digital servo zoom control and manual iris adjustment (typically ranging from f/1.4 to f/16 or closed). Zoom Ratio: 18x
The lens body is finished with a specially developed protein paint designed to absorb moisture and provide a comfortable, fatigue-free grip for long shooting sessions.