... , fiber optic illumination, CCD or CMOS camera, specimen holder 2.Technical data:Auxiliary ObjectiveEyepieceMagnificationVisual FieldWorking Distance0.5xSWF10x3.3x-22.5x67 ... .7-9.8163mm0.5xWF15x4.9x-33.8x49.2-7163mm0.5xWF20x6.5x-45x40-5.8163mm0.5xWF25x8.1x-56. ... 945mm1.5xWF25x24.4x-168.8x12.3-1.745mm2xSWF10x13x-90x16.9-2.540mm2xWF15x19.5x-135x12.3-1.840mm2xWF20x26x-180x10-1.440mm2xWF25x32. ...