Model
420
by National Microscope
The convenience
and versatility of viewing a large picture at 10x magnification, then zooming
continuously all the way to close-up detail at 40x magnification. Upright, unreversed
3-dimensional image remains in focus throughout zoom range. Optional eyepieces
and auxiliary objectives expand magnification range and working distances.
Features top light
with directional beam, bottom light with cool, long-life fluorescent illumination.
Optical
System
- Paired widefield
10x eyepieces are 45° inclined, with dual diopter adjustments, interpupillary
adjustment from 55mm to 75mm. Accepts 23mm eyepiece reticle.
- Viewing head
rotates 360°.
- Achromatic,
color corrected lenses.
- Continuous magnification
from 10x thru 40x. See specification chart for full magnification range available
with use of optional auxiliary lenses
Illumination
- Top light is
12v 15 watt halogen, bi-pin with directional beam and rheostat control.
- Bottom light
is 110v 5 watt fluorescent for cool operation, greater light efficiency.
- Base mounted
light controls permit choice of top only, bottom only, or dual illumination.
- Heavy-duty 3-wire
grounded cord and plug.
- Available with
110v or 220v (220v is CE approved and supplied with European plug). To order
220v, add -220V to end of model number.
Focusing
- Rack and pinion
focusing with large dual focusing knobs with slip clutch to prevents damage
to mechanism.
- Tension adjustment
eliminates focus 'drift'.
Stage
- Two 80mm stage
plates (frosted glass and reversible black/white plastic contrast plates).
- Blue filter
for transmitted light.
- Locked-on stage
clips
Frame
- Professional,
all-metal frame, gray enamel finish.
- Heavy-duty post
mount with locking support collar, permits up or down adjustment of viewing
head to accommodate different sized objects on stage.
- Height: 340mm
(13-3/8 in.) extends to 433mm (17 in.) for larger objects.
- Base width:
171mm (6-3/4 in.), Base depth: 242mm (9-1/2 in.)
- Net wt. 5.3
kgs (11.7 lbs)
Packing
- Molded styrofoam
container with rubber eyeshields, vinyl dustcover and instruction manual.
Individual: Ship wt. 7.7 kgs (17 lbs), Dimensions 550x375x375mm (22x15x15
in.)
Master carton pack 2 each: Ship wt. 14.4 kgs (32 lbs), Dimensions 475x375x475mm
(19x15x19 in.)
Warranty
- Lifetime limited
warranty excluding bulb, cord, and fuse.
This product was added to our catalog on Saturday 17 March, 2012.