... Microscope 1.Obeject Lens:200mm/300mm 2.3-5 Steps magnification 3.Eyepieces:12.5/18.5x ...... Microscope binocular1.Appliction and Features TM ... 200mm,300mm(Lens-changer) Eye piece : 12.5x TM-300F 5 steps magnification:0.4X,0.6X , 1X, 1.6x, ... f=300mm is optional)Eyepieces: 12.5xDioptric adjustment range : ±5°Magnification Changer: 5-steps ,manual magnifcation changer Magnification factors: 0.4/0 ...