National 420 Series
Stereo Zoom Microscopes

Stereo Microscope 420 with Standard Post Stand, Prod. No. 2269-11

The convenience and versatility of viewing a large image at 10x magnification, then zooming continuously all the way to close details at 40x magnification or any point in between. Upright, un-reversed 3-dimensional image remains in focus throughout the zoom range. Features top light for incident illumination and a bottom light for transmitted illumination. The optional trinocular port accepts an optional video C-mount and SLR camera adapters. See the Optical Specification Chart for other magnifications with use of optional auxiliary objectives and eyepieces. The 420 Series Stereo Microscope is available with a number of stands and many options to configure the systems for your requirements.

Optical System

• Paired widefield eyepieces 10x / FN20 are 45° inclined with dual diopter adjustments. Interpupillary adjustment from 55 to 75mm. Eyepiece tube diameter is 30mm.
• Eyepieces accept reticle with 23mm O.D.
  Viewing head rotates 360°, available as binocular or trinocular viewing head.
• Zoom ratio: 4:1 (10x to 40x with standard supplied lenses). Positive click stops at 10x, 20x, 30x and 40x. Achromatic color corrected parfocalled optical system provides sharp focused 3-D image throughout the zoom range.
• 79mm working distance with standard lenses.
• Total magnification range with optional lenses 2.5x-120x

Illumination

• Top light is 12V/15W halogen,with blue filter, for incident illumination with adjustable beam and rheostat control.
• Bottom light is 110V/5W fluorescent light which provides bright light for transmitted illumination.
• 4-position light control: top only/bottom only, top&bottom on/off.

Focusing

• Large dual focusing knobs, heavy-duty rack & pinion with slip-clutch and tension adjustment.
• Tension adjustment eliminates focus “drift”.
• Focusing block fits 25mm diameter post.
• Working distance range with optional lenses 34-137mm.

Standard Post Stand

• Standard post stand with built-in transformer for extra stability and space saving.
• Stage surface 165x220mm deep (6.5x8.75").
• Includes two 80mm frosted glass and black/white contrast plates.
• Locked on stage clips.

Dimensions and weight

• Stand length: 237mm (9.25"), stand width 170mm (6.63"), overall height 330mm (13").
• Maximum specimen height 93mm.
• Net weight 4.9 kg.

Prod #	Description	Unit	Price	Order / Quote
Complete Systems 420 and 420T
was $767.00
2269-11	420-430PHF Binocular Stereo Zoom Microscope with post stand, 10x eyepieces, 45° head, top and bottom illumination	each	$553.00	Qty:
was $767.00
2269-11-230	420-430PHF Binocular Stereo Zoom Microscope with post stand, 10x eyepieces, 45° head, top and bottom illumination, 230V version	each	553.00	Qty:
was $965.00
2269-12	420-1105 Binocular Stereo Zoom Microscope with universal stand 1105, 10x eyepieces, 45° head, no illumination	each	724.00	Qty:
was $791.00
2269-13	420-1107 Binocular Stereo Zoom Microscope with large platform stand 1107, 10x eyepieces, 45° head, no illumination	each	553.00	Qty:
was $937.00
2269-16	420T-430PHF Trinocular Stereo Zoom Microscope with post stand, 10x eyepieces, 45° head, top and bottom illumination, 0.4x video c-mount adapter included	each	634.00	Qty:
was $937.00
2269-16-230	420T-430PHF Trinocular Stereo Zoom Microscope with post stand, 10x eyepieces, 45° head, top and bottom illumination, 0.4x video c-mount adapter included, 230V version	each	634.00	Qty:
was $1,135.00
2269-17	420T-1105 Trinocular Stereo Zoom Microscope with universal stand 1105, 10x eyepieces, 45° head, no illumination, 0.4x video c-mount adapter included	each	805.00	Qty:
was $961.00
2269-18	420T-1107 Trinocular Stereo Zoom Microscope with large platform stand 1107, 10x eyepieces, 45° head, no illumination, 0.4x video c-mount adapter included	each	634.00	Qty:
Accessories and Options for the 420 and 420T
2269-100	420 binocular Stereo Zoom Head only, 10x eyepieces	each	415.00	Qty:
2269-120	420T Trinocular Stereo Zoom Head only, 10x eyepieces	each	505.00	Qty:
2269-150	420 Head Holder and focusing block 25mm for 1105/1107	each	90.00	Qty:
2269-210	Post Stand with Head Holder and Focusing Block 25mm, base transformer with top and bottom illumination	each	200.00	Qty:
2269-210-230	Post Stand with Head Holder and Focusing Block 25mm, base transformer with top and bottom illumination, 230 version	each	200.00	Qty:
2269-230	Universal Boomstand 1105, 25mm post	each	305.00	Qty:
2269-235	Large Platform Stand 1107, 240x280mm, 25mm post	each	115.00	Qty:
Eyepieces, Eyepiece Shields, Adapter Tube
2269-310	Eyepieces WF 5x (FN22)	pair	93.00	Qty:
2269-311	Eyepieces WF 10x (FN20)	pair	93.00	Qty:
2269-312	Eyepiece WF 10x (FN20)	each	46.50	Qty:
2269-314	Eyepieces WF 15x (FN13)	pair	93.00	Qty:
2269-316	Eyepieces WF 20x (FN12)	pair	93.00	Qty:
2269-320	Micrometer Eyepiece WF 10x (FN20), 5mm/100 div	each	77.50	Qty:
2269-321	Micrometer Eyepiece WF 10x (FN20), 10mm/100 div	each	77.50	Qty:
2269-322	Eyepiece Shields, rubber	pair	10.00	Qty:
2269-324	Adapter Tube 3rd Eyepiece, for 420	each	66.00	Qty:
2269-326	Eyepiece Reticle, 5mm/100 div, 23mm for WF10x	each	31.00	Qty:
2269-327	Eyepiece Reticle, 10mm/100 div, 23mm for WF10x	each	31.00	Qty:
Auxiliary Objectives, Ring Light Adapter
2269-245	Auxiliary Objective 0.5x (WD 137mm)	each	105.00	Qty:
2269-247	Auxiliary Objective 0.75x (WD 91mm)	each	105.00	Qty:
2269-248	Auxiliary Objective 1.5x (WD 33mm)	each	105.00	Qty:
2269-240	Fluorescent Ring Light Illumination, 110V/12W	each	116.00	Qty:
2269-240-230	Fluorescent Ring Light Illumination, 230V/12W	each	116.00	Qty:
2269-241	Ring Light Adapter for 430 or 431, 54.5mm OD	each	15.50	Qty:
Stage Accessories
2269-410	Darkfield Kit	each	109.00	Qty:
2269-412	Blue Filter, frosted 35.6mm	each	9.00	Qty:
2269-414	Frosted Glass Stage Plate, 80mm	each	15.50	Qty:
2269-415	Black/White Contrast Plate, plastic, 80mm	each	10.00	Qty:
2269-416	Tweezer Clamp for base	each	55.00	Qty:
2269-417	Stage Clip for base, 75mm from post	each	5.00	Qty:
Digital Accessories
2269-300	0.4x Video C-mount Adapter for 420T (included with the Trinocular Stereo Head)	each	70.00	Qty:
2269-302	2.x Photo Adapter for 420T	each	105.00	Qty:
2269-304	T-mount for Canon FD for 420T	each	30.00	Qty:
2269-305	T-mount for Nikon for 420T	each	30.00	Qty:
2269-307	T-mount for Olympus for 420T	each	30.00	Qty:
2269-309	T-mount for Canon EOS for 420T	each	30.00	Qty:
Dustcover, Case
2269-440	Dustcover, 18" tall x 16"	each	8.00	Qty:
2269-441	Carrying Case, anodized aluminum	each	109.00	Qty:
Bulbs
2269-530	Halogen Bulb, 12V/15W, incident	each	13.25	Qty:
2282-232	Halogen Bulb, 12V/10W, transmitted	each	17.50	Qty:
2269-234	Fluorescent Bulb 115V/5W, transmitted	each	13.50	Qty:
2269-234-230	Fluorescent Bulb 230V/5W, transmitted	each	22.50	Qty:
2269-236	Fluorescent Ring Bulb Replacement 115V/12W	each	19.75	Qty:
2269-236-230	Fluorescent Ring Bulb Replacement 230V/12W	each	27.00	Qty: