National Optical 452TBL-15 1x/3x Stereo Microscope

The 452TBL-15 1x/3x Stereo Microscopefrom National Optical is a dual magnification stereoscopic microscope designed 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 452 stereo microscope has a paired 15x eyepiece delivering 15x and 45x magnification. Two achromatic paired objectives are parcentered and parfocalled to keep the specimen centered and focused when switching between the two magnification settings.

The 452TBL-15 microscope can illuminate specimens from above and/or below using 10W tungsten lights activated by separate base-mounted On/Off switches. 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 make the 452 stereo microscope a welcome addition to classrooms as well as labs.

Optical System

• Paired 15x(20mm) inclined eyepiece
• 1x and 3x achromatic objectives
• 15x and 45x magnification
• Parfocalled, parcentered,paired objectives
• 75mm / 3" working distance, 35mm / 1.4" maximum specimen height
• Eyepiece with diopter adjustment and reticle holder/retainer
• 55-75mm /2.2-3" interpupillary distance

Focusing

• Rack and pinion focus system
• Slip clutch prevents over-turning
• Tension adjustment prevents focus drift

Lighting

• Incidental (top)10 watt tungsten illumination
• Transmitted(bottom)10 watt tungsten illumination
• Dual base-mounted On/Off switches

Construction Details

• 80mm frosted glass and 80mm reversible black and white stage plates
• Locked on metal stage clips
• Cast metal frame
• Grey enamel finish
• 12.2" (31 cm) height
• 5.5 lb (2.5 kg) weight