HJ21ex7.5B IASE A
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.
Výhody
- Minimum zoom effect of focus
- Power Optics - superb imagery
- Internal focus - minimises chromatic aberrations
- Enhanced Digital Drive technology
- Ecological, robust ergonomic design
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Long portable EFP lens
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.
Optical Technologies
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
Digital Technologies
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
Mechanical Technologies
Compact digital servo drive unit is mounted to the lens at a 12.5
degree angle