... maximum angle of 180 ° flip 2, with a fine focus of a large objective lens (adjustable 20mm), optional 250mm ... two 15V / 150W halogen lamp can quickly switch8, the manual focus 20mm fine-tuning9, built with orange and green filter10, the ... head teaching microscope, binocular assistant microscope, internal or external camera and interface, and digital radiography systems and interfaces.Thanks for ...