5.3X/8X/12X Halogen Coaxial Reflection Light Pneumatic Arm Floor Stand Binocular Parallel Multiple Power Surgical Microscope (Foot Control: Focus) SM51050192Microscope Optical Data Sheet P N Objective Objective Working Distance Eyepiece SM51050192 (12. 5X Dia. 16mm) Magnification Field of View(mm) SM51050192 0. 64X 190mm 8X 25mm 1. Magnification=Objective Optical Magnification * Body Magnification * Eyepiece Optical Magnification 2. Field of View=Eyepiece Field of View Objective Optical Magnification*Body Magnification 3. The Darker background items are Standard items, the white background items are