National 446TBL-20 1x/3x Stereo Microscope

The 446TBL-20 1x/3x Stereo Microscope from National Optical is a�dual magnification stereoscopic microscope fit for laboratories, high school and university students. The stereo (two) eyepiece configuration is preferred by most researchers and students because of the superior depth of field and comfort compared to monocular microscopes. This model of the 446 stereo microscope has a paired 20x eyepiece delivering 20x and 60x magnification. Two achromatic paired objectives are parcentered and parfocalled to keep the specimen centered and focused when switching between the two magnification settings. The stage�can be�illuminated from above�and/or below using 10W�tungsten�lights�activated by separate base-mounted On/Off switches.�The top (incidental) light source has an adjustable beam to help optimize the brightness and contrast of the specimen.

A user-friendly design�complements the�range of features that make the 446 stereo microscope a welcome addition to labs as well as classrooms.�The heavy-duty post-mounted adjustable viewing head permits use of specimen heights�up to 35mm / 1.4", and�is also capable of�360��rotation to help share the eyepiece among colleagues and students�without moving the microscope. The rack and pinion system has a single focus dial�and�includes a slip clutch�mechanism�to�prevent mishandling. An adjustable interpupillary distance, left-side diopter correction, and reticle holder/retainer provide the 446 series with the flexibility needed to create a customized viewing experience.