... Operation Microscope 1.Operation microscope Appliction and Features TM-300F Portable operation Microscope is applicable for diagnosis,treatment,examination ... ophthalmology and gynecology. Compared with normal operation microscope,TM-300F Portable opeation microscope has the larger range of functions and ... f=200mm,300mm(Lens-changer) Eye piece : 18.5x TM-300F 5 stepts magnification:0.4, 0.6, 1, 1.6 ...