The AmScope SM20 Barlow Lens is a 2X auxiliary lens for AmScope SM-series stereo microscopes (and SW-series compatibility) that doubles the magnification when attached. It uses a 48 mm mounting diameter, a standard 1-7/8 inch thread for SM/SW instruments, and threads into the front accessory port to deliver a quick magnification boost without changing objectives. Identified by model SM20, this dedicated accessory expands the SM-series’ optical range for close inspection of small parts and assemblies in lab, classroom, or workshop settings. Being a passive optic, it requires no power and adds no electronics to the microscope path.
