The M620 monocular compound microscope is designed for classrooms and basic laboratory applications. It is an ideal microscope for teachers and students, including those in medical school or with a major in biology. It has a number of advancements in functionality compared to other microscopes in its class, such as enhanced LED lighting and a centerable condenser. Use the microscope for studying fixed or live cells, bacteria, plants and soil, or water samples. The monocular head keeps things simple. The use of a single eyepiece means that no adjustments are necessary for eye alignment or symmetrical focus. The head can rotate 360° for viewing from different positions. Interchangeable eyepieces allow you to change the overall magnification with optional lenses, or use a camera in place of the eyepiece to view microscopic images on a computer monitor or other display. The objective turret provides instant access to 4 magnification levels to easily focus in on minute details from 40X to 1000X. This covers magnifications needed for studying hair follicles, cells, and bacteria. These high-quality lenses are achromatically corrected to improve resolution and color accuracy. The 2-layer mechanical stage provides smooth and precise movement for examination of specimen slides. The stage's low-position controls are conveniently placed near the coaxial focus knobs for a streamlined workflow. Examining specimen slides is intuitive and precise for users at any skill level. The LED sub-stage lighting provides cool, energy-efficient illumination. The light-source is daylight balanced to produce natural colors for imaging. With our specially developed fly-eye lens, the light is evenly distributed at maximum brightness to improve contrast and resolution. Illumination is further enhanced by a centerable Abbe condenser, which can be realigned for any magnification to guarantee proper lighting. Specifications Optical System Finite-conjugate Tube Length 160mm Head Monocular, 45° incline, 360° rotatable Ocular Diameter 23mm Eyepieces 10X Objective Lenses DIN standard Objective Parfocal Distance 45mm Objective Mounting Thread RMS 20.32mm Objective Turret quadruple, ball-bearing movement Focusing System coaxial coarse and fine focus Stage two-layer with caliper Stage Dimensions 127mm x 118mm Stage X-Y Travel Range 70mm x 21mm Transmitted Illumination 1W LED Condenser Abbe condenser with iris diaphragm, NA1.25 Sub-stage Condenser-holder rack-and-pinion Power 100-240VAC 50/60Hz wide-band Objective Lenses Magnification Corrections NA Immersion Medium Cover-glass Thickness 4X achromatic 0.10 — 0.17mm 10X achromatic 0.25 — 0.17mm 40X achromatic 0.65 — 0.17mm 100X achromatic 1.25 oil 0.17mm Packing List:One monocular microscope head One microscope body Four objective lenses: 4X, 10X, 40X, 100X One 10X eyepiece One blue color filter One dust cover One sample immersion oil