... 12.5/18.5x ...... Operating Microscope TM-300F1.Appliction and Features TM-300F operating Microscope is applicable for diagnosis,treatment, ... like orthopaedics,Surgery,ENT Surgery,ophthalmology and gynecology.2.Operating microscope Features and configuration: Objective Lens : f=200mm,300mm(Lens ... /28.1/50/70.7/84.1 LP/mmExit pupil distance: 18mmExit pupil diameter : 1.2-2mmPupil distance : 52-74 ...