Specifications Special made according to private data of InterpupillaryFocusing Distance is FixedMagnification : 2.5x, 3x, 4x, 5x, 6xWorking Distance : 370mm or 420mm or 460mm or 500mmField of Vision : 120-55mmResolution : 12-20 Other Information Pay Mode Terms : L/C (Letter of Credit)Minimum Order Quantity :