Canon CJ12ex4.3B IASE S 4K Lens

This is a 2/3” 4K wide angle portable lens with 12x zoom and focal length that extends from an exceptional 4.3mm at the wide end to 52mm. Compact and lightweight, it’s the perfect way to bring high-quality 4K resolution to ENG and studio applications. The CJ12 gives you a focal length beginning with an impressive 4.3mm and extending up to 52mm. The lens’ built-in extender doubles this to 104mm, without compromising its 4K quality. It weighs just over 2kg which allows it to sit comfortably on the shoulder, making it ideal for ENG and sports applications.

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Canon CJ12ex4.3B IASE S 4K Lens


  • 4K resolution 2/3” portable wide angle lens with 12x zoom
  • Exceptional 4.3mm focal length at the wide end extends to 52mm (104mm using the built-in 2x extender)
  • Stunning optical performance right to the edge of the image when paired with a 2/3” 4K compatible camera
  • Combines 4K quality with lightweight design and compact size comparable to HD lenses for comfortable on-shoulder shooting
  • Sustained 4K performance even when using the built-in 2x extender
  • Proven, high-quality 16-bit encoder captures precise information on zoom, focus and iris and allows support for aberration correction immediately on start-up
  • 3x 20-pin connectors make for effortless use with existing Canon HD lens accessories and virtual systems.
Canon CJ12ex4.3B IASE S 4K Lens


Zoom Ratio  12x
Image size  2/3″
Built-in Extender  2.0x
Range of focal length (with Extender) 4.3-52mm (8.6-104mm)
Maximum Relative Aperture(with Extender)  1:1.8 at 4.3-40mm1:2.4 at 52mm(1:3.6 at 8.6-80mm)(1:4.8 at 104mm)
Angular Field of view – 16:9 Aspect Ratio (9.6×5.4mm, with Extender)  96.3° x 64.2° at 4.3mm10.5° x 5.9° at 52mm (58.3° x 34.9° at 8.6mm) (5.3° x 3.0° at 104mm)
M.O.D. from lens front  0.3m
Object dimensions at M.O.D. – 16:9 Aspect Ratio (9.6×5.4mm, with Extender)  76.4 x 43.0cm at 4.3mm 6.0 x 3.4cm at 52mm (38.2 x 21.5cm at 8.6mm) (3.0 x 1.7cm at 104mm)
Approx. Size (WxHxL)  163.5 x 108 x 247.8mm
Approx. Mass  2.1kg
Information Display  Yes
Filter Thread Size (Hood / Lens Barrel)  127mm P0.75 / –

Canon CJ12ex4.3B IASE S 4K Lens