Model 232B microscope offers 20X or 40X magnification; a measuring scale (reticle) graduated from 0 to 50 in increments of 0.002 inch (40X)and 0.004 inch (20X); a flat field; rack and pinion focusing; and a self-contained light source. Model 232B-Metric is available with metric reticle; .05m (40X) and .1mm (20X) increments.

The 232B comes ready to use with 20X magnification. Included is an extension tube that is easily used to change the magnification from 20X to 40X. To install the extension tube, grasp the top of the eyepiece cap and pull straight up. The eyepiece cap will come out attached to the eyepiece tube (a brass sleeve). Slide the extension tube over the eyepiece tube and insert back into the main barrel.

The reticle permits direct reading measurements. At a magnification of 20X, the graduations are 0.004 inch (.1mm metric reticle) apart; at 40X, they are 0.002 inch (.05mm metric reticle) apart. The Model 232B is focused with a rack and pinion system. Illumination is provided by the self-contained and prefocused light source.