Meiji Techno EM-21 – LED Binocular Entry-Level 2X, 4X Incident and Transmitted Turret Stereo Rechargeable Microscope

This is a specialized objective that is intended for the small Zeiss semiconductor comparison microscope. The objective thread is much smaller than the normal RMS thread (13.5mm diameter with a 0.35mm thread pitch). This objective also has an extension tube that is 34mm long. There are no optics in the extension tube.