This Siedentopf trinocular microscope is ideal for use at the senior high school and college level, or for use in veterinary and medical applications. The adjustable interpupillary distance ranges from 54mm to 76mm, and it offers four levels of magnification, ranging from 40x to 1000x.The trinocular port allows you to connect a digital camera or an LCD screen, to broadcast images of the specimen being observed. Eyepiece with a built-in pointer ensures that definite points on the slide can be easily designated and quickly identified. Standard DIN achromatic objectives are parfocaled, parcentered, and color-coded to provide sharp, color-corrected images. The coaxial coarse and fine focusing knobs are made with maximum stability and minimum strain.The ball-bearing driven, reversed nosepiece with internal click-stops, guarantee parcentration and repeatability with every magnification change. The double layer built-in mechanical stage with a low-positioned control knob, allows for smooth and comfortable specimen movement.5-year limited warranty excluding bulbs.