... stand Operation Microscope 1.Operation microscope Appliction and Features TM-300F Portable operation Microscope is applicable for diagnosis,treatment, ... Features and configuration: Objective Lens : f=200mm,300mm(Lens-changer) Eye piece : 18.5x TM-300F 5 stepts magnification:0.4 ... , 0.6, 1, 1.6, 2.5xOperation microscope Specification :Obejective Lens: f=200mm (f= ...