QA and Incoming Inspection
For many industrial inspection tasks, e.g. judging surface finish, brazed joint quality, and other subjective criteria at incoming inspection, a high-quality handheld magnifier is more versatile and effective than most types of bench-mounted magnifiers. The choice of magnifying power will be largely limited by practical working distance.
For example, if your application requires viewing at about 4 inches (100mm) from the item, a Zeiss D8-AR, with a focal length of 5 inches (125mm) is the appropriate choice. Today's highly miniaturized electronic circuitry demands high-powered magnification for inspection of solder joints, component and connector pin alignment, and other fine detail. A Zeiss D16-AR handheld glass and a Zeiss D12+24 multi-lens loupe magnifier make an ideal team for inspecting surface-mount PC boards.