SZM-45 Zoom Stereo Microscope SZM-45 series zoom stereo microscopes is newly, fully coated optical system sharp and clear images with extremely good flatness and contrast. The images are brighter and more distinct even as the periphery of the field of view. Numerous types of bases and stands are suitable for any type of use. A rich range of accessories considerably increases the potential of these instruments. Optional Attachment: Auxiliary Objectives: 0.5X (WD:165mm), 0.75X (WD:125mm) 1.5X(WD:45mm), 2X(WD:30mm) Wide Field Eyepiece: WF15X/15mm, WF20X/12mm Dark Field Condenser & Jewel tweezer Fiber Optic Illumination SZM45 Optical parameter Objective 0.7X-4.5X zoom ratio 6.4:1 Eyepiece Auxiliary lens - 0.5X 1.5X 2X Magnification 7.0X-45.0X 3.5X-22.5X 10.5X-67.5X 14X-90X View field 28.6 -4.4 mm 51.7-8.9 mm 19-3 mm 14.3-2.2 mm Magnification 10.5X-67.5X 5.25X-33.75X 15.75X-101.25X 21X-135X View field 21.1-3.3 mm 42.8-6.7 mm 14.3-2.2 mm 10.7-1.7 mm Magnification 14.0X-90.0X 7.0X-45.0X 21.0X-135.0X 28X-180X View field 14.3-2.2 mm 28.6-4.4 mm 9.5-1.5 mm 7.7-1.1 mm Working distance 100mm 165mm 45mm 30mm