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.
Here is a "Top Tips" summary based on the official manual to help you get the best performance out of your lens. canon yj18x9b4 manual top
Often used on mirrorless cameras (like Sony GH or FS series) via B4-to-mount adapters. Note that the IRS model often includes a 2x extender (doubler), which is essential for covering larger sensors without vignetting. If you'd like to dive deeper, I can look for: The (IRS/KRS) is a professional 18x zoom lens
This is not just for carrying. The handle aligns with the lens's center of gravity when attached to a camcorder (e.g., Canon XF series or Sony PXW). Core Specifications Focal Length: 9mm to 162mm