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Description
National 446TBL-20 1x/3x Stereo Microscope10W Top Bottom Tungsten Lighting 45 Inclined Viewing Head 20x Stereo Eyepiece 1x 3x Objectives, 20x 60x Magnification Parfocalled Parcentered Paired Objective 80mm Frosted Glass Stage Rack and Pinion Focusing The 446TBL 20 1x 3x Stereo Microscope from National Optical is adual magnification stereoscopic microscope fit for laboratories, high school and university students. The stereo (two) eyepiece configuration is preferred by most researchers and
- 10W Top/Bottom Tungsten Lighting
- 45� Inclined Viewing Head
- 20x Stereo Eyepiece
- 1x/3x Objectives, 20x/60x Magnification
- Parfocalled/Parcentered Paired Objective
- 80mm Frosted Glass Stage
- Rack and Pinion Focusing
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.
- Optical System
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- Paired 20x�inclined eyepiece
- 1x and 3x achromatic objectives
- 20x�and 60x 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
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- Rack and pinion�focus system
- Slip clutch prevents over-turning
- Tension adjustment prevents focus drift
- Lighting
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- Incidental (top)�10 watt�tungsten illumination with adjustable beam
- Transmitted�(bottom)�10 watt�tungsten illumination
- Dual base-mounted On/Off switches
- Construction Details
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- 80mm frosted glass�and 80mm�reversible black and white stage�plates
- Locked on metal stage clips
- 360� rotating viewing head
- Cast metal frame
- Grey enamel finish
- 14.6" (37 cm) maximum height
- 5.5�lb (2.5 kg) weight
- Eyeshields
- Dustcover
- Lifetime Limited Warranty (Excluding Bulb)
| Microscope Type | Stereo |
| Eyepiece | 20.0x |
| Objective(s) | 1.0x / 3.0x |
| Head | Inclined |
| Light Source | 12 V, 10 W tungsten (incidental/transmitted) |
| Light Control | 4-position On/Off |
| Stage | 80 mm frosted glass and reversible black/white contrast plate |
| Interpupillary Adjustment | 2.2 - 3" (55 - 75 mm) |
| Maximum Specimen Height | 1.4" (35 mm) |
| Maximum Height | 14.6" (37 cm) |
| Weight | 5.5 lb (2.5 kg) |
Shipping Notes
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Exchange/Return Notes
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