When a lens loses its "parfocal" characteristic—meaning an object goes out of focus as you zoom out from telephoto to wide—the flange focal distance must be recalibrated manually using the back focus ring.
: Position a highly detailed focus chart or Siemens star target roughly 3 meters away from the camera under flat lighting.
This lens was a workhorse for SD (Standard Definition) and early HD cameras. Today, it is popular among indie filmmakers adapting B4 lenses to Micro Four Thirds or Blackmagic cameras due to its parfocal design (stays in focus while zooming) and fast aperture.
The Canon YJ18x9B4 was designed for intuitive, fast-paced shooting. The lens offers fully manual control, with the option of using built-in or external servo controls for zoom and focus. canon yj18x9b4 manual top
While the search results occasionally mention a "YJ18x9B4 printhead" for printers, this model number primarily refers to the high-performance . Below is a comprehensive guide to its technical specifications, manual operation, and maintenance. Core Specifications & Features
The focus system relies on a manual rubber grip focus ring. When adjusting focus manually, verify the servo mechanics do not bind. If using a remote focus demand cable system, ensure the mechanical focus selector gear on the drive housing is disengaged to prevent stress on the digital servo assemblies. Zoom Control Mechanics
The Canon YJ18x9B4 is a standard-definition (SD) broadcast lens designed for news gathering (ENG) and field productions. It features an 18x optical zoom (9–162mm) and a fast aperture of f/1.8, making it effective for low-light shooting. 🎥 Key Technical Specs 18x magnification with a range of 9mm to 162mm. When a lens loses its "parfocal" characteristic—meaning an
Note: Always ensure you are downloading manuals from official Canon sources to avoid malware or incorrect technical diagrams.
The features that make it a standard in the industry include:
If you are looking for specific, in-depth technical specifications, check the used market listings for Canon YJ18x9B4 KRS Today, it is popular among indie filmmakers adapting
: f/1.8 at 9mm–115mm; f/2.6 at 162mm Format : Designed for 2/3-inch 3-CCD or 3-CMOS sensors
Always cap the front and rear elements to prevent scratches and dust accumulation. 5. Frequently Asked Questions Q: Can I use the Canon YJ18x9B4