The HJ21ex7.5B IASE A has wildest field of view among the standard telephoto lenses. Combined with minimum zoom effect of focus it is is particularly suitable for dramas and documentaries.
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The HJ21ex7.5B IASE A is a production portable lens having the widest field of view among the standard telephoto series of lenses. Its relatively large input section includes innovative optical compensation to reduce focus breathing to an extremely low level. It is intended for producers and broadcasters having as their foremost priority a long focal length capability, wide-angle field of view, and exceptional optical performance. This has been achieved in a modest 2.69kg overall package.
An established track record, makes the HJ21ex7.5B IASE A the long lens of preference in a wide variety of drama and reality television productions. Combining a 21x zoom range with generous wide-angle of 65.2 degree horizontal (for the 16:9 aspect ratio) this lens has proven to be a superb workhorse that can address a wide range of field production projects.
Power Optics - combination of specialized materials, contemporary optical design, and multilayer coatings that produce the superb imagery
Internal Focus - a Canon design innovation that uses a floating optical system to better control chromatic aberrations
Crossover Technology - switchable operation between 16:9 and 4:3 aspect ratio imagery
New third-generation enhanced digital servo systems using Canon-developed 16-bit optical rotary encoder devices introduce new creativity to handheld acquisition systems. Enhanced Digital Drive technology - encompasses a microcomputer driven servo control that embodies position memory and user-defined digital functionality to significantly empower the camera operator. A 16-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
Compact digital servo drive unit is mounted to the lens at a 12.5 degree angle