Leica M691 Surgical Microscope Features This Leica microscope is great for those facilities that need a great multi-purpose option. The M691 includes all of the superb optical clarity and red-reflex necessary for eye surgery as well as the cross table accessories for hand surgery. Microscope electrically controlled via footswitch Electrically adjustable magnification (zoom and focus (focus) Total magnification: continuously adjustable from 7x to 36x High-end optics with high depth of field! Main arm and manually adjustable spring Focal Length: f = 250 mm (lens can be exchanged for another with a different focal length) Binocular doctor fixed angle of 45 degrees Halogen Lighting: 50 W The dual brake disposed in the base of the microscope Leica M691 Specifications General Specifications Binocular: 0-180 Inclinable; f=170mm Other options: 10-50 degree; f=170mm Objective Lens: 175mm, 200mm with red reflex enhancer Magnification: Motorized 1:5 Focus: Motorized with 50 mm travel Eyepieces: 10 x 21 Widefield Pupillary Distance: 55 to 75 mm Filter: Standard UV Lightsource: Halogen 12V 50W Illuminated Field: 65mm Power Source: 110 to 240V; 50 - 60 Hz