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Canon CJ20ex7.8B

The CJ20ex7.8B delivers superior color reproducibility for outstanding expressive power, with the lens contributing to the creation of compelling video brimming with realism. The built-in 2x extender increases the lens’s focal range by two fold while maintaining 4K superior optical performance.

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High zoom ratio (90x) and long focal length (810 mm)

 As a lens that supports 2/3″ 4K cameras, this model boasts the
world’s highest zoom ratio* and world’s longest focal length*.
(* As a 2/3″ 4K lens available as of September 7, 2015)

Applicability and ease of operation ideally suited
to 4K shooting

Since the lens achieves the zoom ratio, long focal length and size as well as the servo speed and stability required for the telecasting of live sports events and other applications, it ensures the applicability and ease of operation ideally suited to 4K shooting.

Achieves 4K optical performance even when
using the built-in 2x extender and image
stabilizer

Thanks to the precision of its high-grade components and assembly, the lens achieves high 4K camera-compatible even when the built-in 2x extender has been engaged. Also featured is an optical shift-type image stabilizing mechanism of Canon’s highest grade, helping to ensure the image-stabilizing performance commensurate with 4K.

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Built-in extender 1.0× 2.0×
Focal Length 7.8-156mm 15.6-312mm
Zoom Ratio 20x
Maximum Relative
Aperture
1:1.8 at 7.8-108mm
1:2.6 at 156mm
1:3.6 at 15.6-216mm
1:5.2 at 312mm
Angular Field of View 63.2°×38.2°
3.5°×2.0°
34.2°×19.6°
1.8°×1.0°
M.O.D 0.80m
Object Dimensions
at M.O.D.
91.7×51.6cm [at 7.8mm]
4.8×2.7cm [at 156mm]
45.9×25.8cm [at 15.6mm]
2.4×1.4cm [at 312mm]
Approx. Size
(W×H×L)
169.9×114.4×230.0mm
Approx. Mass 2.18kg