Prior Scientific Inc. has upgraded its fiber optic bench microscope for more complex connector configurations. An adapter port is incorporated into the stage assembly for the inspection of oversized or custom connectors. The microscope can inspect single- and multifiber connectors from 40x to 800x, and higher magnifications are possible with closed-circuit television. A centering mechanism locates the ferrule ends of connectors for examination. The microscope is suitable for such applications as manufacturing, quality control and research.