These high magnification microscopes have special three-port trinocular body for binocular viewing, video output and images of photomicrography. Image analysis can be done on pc with caliper functions such as length, width, perimeter, radius angle and other operations. Technical specifications: magnification: 500x to 10000x on monitor optical system: high resolution optics for sharp images eyepieces: hy 5x and wf 10x objectives: 5x, 10x, 20x, 45x, 100x video camera: high-resolution ccd camera b/w or colour, 470 lines video monitor: high resolution b/w or colour measuring options: very high precision measuring stages with travel 25mm x 25 mm, 50mm x 50 mm up to 150mm x 150mm least count 1 micron features: cross line reference on the monitor screen. Transmitted dia illumination and reflected epi illumination with high intensity halogen bulbs and intensity controls. Optional thickness/depth measurement with least count of 1 micron. Options available with dro systems, data processors and 2-d geometric software versions with pc-interface.