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Features BCM1901 Series Colposcopes are precise optical instruments designed specially for the gynecologic examination and diagnosis. Due to the magnification of the instrument, the pathological changes in the vagina, which is impossibly viewed with naked eyes, can be clearly seen by doctor. Therefore, the correctness of a diagnosis is enhanced significantly. This series colposcope are featured for sharp image, wide field of view, uniform illumination, adjustable brightness and easy operation. They are essential instruments for gynecologic examination. Specifications Model BCM1901-A BCM1901-B BCM1901-C BCM1901-D BCM1901-E Observation angle 45° Tilted Binocular Observation Unit Magnification of eyepiece 16X Focal length of objective F=230mm & 280mm (Connecting screw: M58x0.75) F=280mm (Connecting screw: M57x0.75) Working distance 215mm & 260mm 265mm Magnification changer 0.4X, 0.66X, 1X, 1.5X, 2.5X 5-step magnification change No Total magnification 2.9X-21.7X 11X Linear field 11mm – 84mm 24mm Beamsplitter 50:50 Beamsplitter No Demonstrator Total magnification:2.1X-16.4X Optional TV adapter C-mount 1/3″ CCD attachable No Photo adapter Optional No Fine focusing distance 20mm 60mm Balancing arm Counterweight adjustable No Counterweight adjustable Illumination system Coaxial illumination with cold light source fiber-optic cable 12V 100W halogen lamp, brightness adjustable Filter Green filter with frame, to be fitted on the objective when it is used Fiber-optic cable 1300mm Stand short column fitted on the round base with 5 jaws and a round counterweight ring Column height adjustable fitted on the round base with 3 jaws short column fitted on the round base with 5 jaws Notes :Table of Optical Characteristics for BOM1403-A and BOM1403-B: Item Microscope Objective focal length F=230mm F=280mm Magnification on bandwheel 2.5X 1.5X 1X 0.66X 0.4X 2.5X 1.5X 1X 0.66X 0.4X Total magnification 21.7X 13.2X 8.7X 5.7X 3.5X 17.8X 10.8X 7.1X 4.7X 2.9X Linear field (mm) 11 18.2 27.6 42.1 69 13.4 22 33.6 51.1 84 Resolution (lp/mm) 86 68 52 35 27 80 63 42 31 22.3   Item Demonstrator Objective focal length F=230mm F=280mm Magnification on bandwheel 2.5X 1.5X 1X 0.66X 0.4X 2.5X 1.5X 1X 0.66X 0.4X Total magnification 16.4X 10X 6.5X 4.3X 2.6X 13.4X 8.2X 5.4X 3.5X 2.1X Linear field (mm) 11.6 19 29 44.1 72.5 14.1 23.1 35.4 53.7 88.3 Resolution (lp/mm) 76 60 32.6 28 25 68.5 49 33 27 25