Description

The HJ21ex7.5B has an established track record as the long lens of preference in a wide variety of 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. It is noted for its unusually low focus breathing. Its 3-group focusing system minimizes chromatic aberrations at wide-angle operation. The design optimization strategies sought a high and balanced MTF profile over the entire image plane at an approximate F4.0 aperture setting. Relative light distribution was optimized for F2.8 and above and this uniformity of brightness across the image plane combines with the high contrast and excellent picture sharpness to produce vividly clear HD pictures. Contrast was extended by superb control of black reproduction – with optical and mechanical design innovations that substantially reduced flare, veiling glare, and any internal reflections. Similar attention to minimization of ghost images and other highlight-related chromatic distortions caused by strong light sources on-axis and off-axis further extend the operational contrast range of the lens

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