產品名稱：Zoom Magnifier變焦放大鏡

an important optical advance in hand magnifiers
furnished with one scale having both metric and inch scales
This model 750 stepless hand magnifier has click stops (shown in a small window) at 8x, 10x, 12x, 14x, and 16x, to reach a known magnification. 8 lenses in 6 groups. The design maintains sufficient brightness at each magnification stage.
 

The black body, finished with aluminum precision machining similar to camera lenses, allows smooth zooming-in and zooming-out. Before starting an observation, move the adjustment ring at the bottom of the lens body to select the optimum magnification in accordance with the purpose of the inspection. When completed, adjust the ring around the eyepiece so that the scale will be clearly visible. The zooming mechanism changes magnification to allow for continuous observation. With case, lens cap and cloth. Scale on reticle is ±8mm with 0.1mm divisions and ±0.3" with .005" divisions.