Ideal for laboratory and university applications, semi-plan objectives deliver excellent clarity and flatness of field. All objectives are parfocalled, parcentered, and color-coded. Widefield 10x/18 mm eyepieces with rubber eyeshields are 45 degrees inclined with interpupillary and diopter adjustments for comfortable viewing. Use the 3-watt LED variable control to set illumination to the necessary level. Iris diaphragm controls resolution and contrast for different magnification levels. Large 140 x 135 mm stage features coaxial coarse and fine adjustments.