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.

黑色机身采用类似于相机镜头的铝精密加工完成，可实现平滑的放大和缩小。 在开始观察之前，移动镜头底部的调节环，根据检查目的选择蕞佳放大倍率。 完成后，调整目镜周围的环，以便清晰可见刻度。 变焦机构改变放大率以允许连续观察。 有表壳，镜头盖和布。 光罩上的刻度为±8mm，分度为0.1mm，±0.3“，分度为.005”。