Featuring a 10:1 zoom ration, built in variable double iris diaphragms, and positive detent click-stops at 12 positions of magnification.  Two perpendicular columns of eight zoom lenses in four groups move in a smooth continuous motion by rotation of the ergonomically sized and positioned zoom control.  A magnification indicator is conveniently located inside the zoom control.  The RZ Series is also coated with a special anti-static finish, which is especially useful when working with sensitive electronic components. 

Ergonomic and standard type heads are available.  The ergonomic head features low positioned eyetubes and is adjustable vertically from 10Õ to 50Õ for comfortable fatigue-free viewing.  Interpupillary distance is adjustable between 52mm and 80mm.  The standard economical binocular head is inclined at 45Õ with an interpupillary adjustment ranging from 46mm to 75mm.

Distortion-free, ultra wide-field eyepieces with dioptric adjustment of plus or minus 5 diopters are available in several powers of magnification and are provided with reticule mounts for measuring and photography.

A coaxial coarse and fine focus mechanism with a 50mm focusing range is provided for ultra smooth and precise focus control.