Broadcast Lenses

Canon KH21ex5.7 IRSE

The KH21ex5.7 IRSE is a 1/2” portable telephoto lens with a built-in 2x extender that provides great optical performance and value.


  • Focal range 5.7~120mm (240mm with Extender)

  • MOD 0.8M (10mm with Macro)

  • Built-in 2x extender

  • Enhanced Digital Drive

  • Ecological, robust, ergonomic design

Detailed Features

  • Telephoto 1/2” portable HD lens

    The new KH21ex5.7 IRSE is a1/2” portable HD telephoto lens specifically designed to support a range of corporate and business industrial applications.The KH21ex5.7 achieves a remarkable lens offering with focal lengths of up to 120mm (or 240mm with extender) and a wide-angle of almost 63 degrees horizontal. Combined with an exceptionally high sensitivity (F1.4 maximum aperture) this lens can encompass an unusually broad range of shooting situations, and offers excellent operational capabilities at a very affordable price in a compact package weighing 1.79kg.The lens has high MTF over the entire image plane, minimization of chromatic aberrations, and maximization of image contrast. Relative light distribution is optimized for the more open aperture settings and uniformity of brightness across the image plane combined with the high contrast and excellent picture sharpness produces vividly clear HD pictures. Contrast is extended – flare, veiling glare, and any internal reflections have been substantially reduced. It has tight control of the geometric distortion at wide-angle settings and spectral transmittance characteristic adheres to HDTV colorimetric standards.

  • Optical Technologies

    Newly developed optical materials combined with the very latest lens element design innovations and multilayer coatings - that produce an unsurpassed pristine imaging system for the most discerning production team.

  • Internal Focus

    A Canon design innovation that uses a floating optical system to better control chromatic aberrations

  • Digital Technologies

    Enhanced Digital Drive technology16-bit rotary encoder for aperture control reports to the associated camera Iris control system (10-bit compatibility)Maximum Zoom speed is 0.5 seconds and Focus is 1.5 seconds

  • Mechanical Technologies

    Compact digital servo drive unit is mounted to the lens at a 12.5 degree angle for comfort and balanceMagnesium alloy body for light weight and exceptional durability

  • Ecological Design

    All contemporary Canon lenses avoid the use of materials and substances potentially harmful to the environment. Lead has been removed from all optics and other identified substances from all components comprising the composite lens system.

Canon KH21ex5.7 IRSE
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