Specialized Tools for Electrophysiology and Cell Biology Research

(Z850) Stereo Zoom Microscope with Boom Stand

Product Summary

High Performance Optics, Unsurpassed Ergonomics.

The Z850 is a versatile, high performance, ergonomically designed stereo zoom microscope ruggedly built to withstand years of heavy usage. With a zoom ratio of 6.3:1 the Z850 provides superior optical performance at an affordable price.

Key features include:

  • Binocular or trinocular viewing heads are inclined 45º and can rotate 360º
  • A best-in-class 8x-50x magnification range with click-stops at 10x, 20x, 30x, 40x and 50x 
  • 115 mm working distance allows easy access to specimens
  • WF 10x,/22 mm field of view eyepiece 
  • Airtight assembly prevents contamination from dust, water, oil 
  • Z850 stereo bodies are made of anti-electrostatic materials 
  • An anti-mold design, in addition to being air tight, allows the Z850 to be used in areas of high heat and humidity

Microscope viewing heads

All microscope viewing heads (binocular or trinocular) can accept eyepieces and objectives. Generally speaking, eyepieces establish the magnification range and objective establish the resolution and working distance of the microscope. (The objective also affects the magnification range, but it's easier to consider this separately.)


Eyepiece selection is required and 10x is considered standard. The base magnification range of the viewing head is 0.8-5x and the 10x objectives increases this range to 8-50x. (The 20x eyepieces will increase the magnification range to 16-100x.)


Z850 microscope heads do not require separate objectives and the native design provides 1.0x magnification at a working distance of 115 mm. Auxiliary objectives of 0.5x, 0.7x, and 2.0x are available, with the 2.0x objective providing the greatest increase in resolving power at the expense of of a shorter working distance of 43 mm.

The 2.0x objective doubles the microscope's resolution by reducing the area of the visual field. While providing greater resolution, this reduced visual field has the side effect of increasing the magnification since a smaller visual field can look like a zoom. However, the resolving power (ie, the detail you can see) will be greater with a 2.0x objective at 1x zoom over a 1.0x objective at 2x zoom) .

What's included

  • Microscopes sold with stands include 10x eyepieces.
    Additional eyepieces of 15x and 20x are available.
  • Viewing heads sold separately require the purchase of eyepieces.
  • All viewing heads are 1.0x objective native.
    Optional 0.5x, 0.7x and 2.0x objectives are available.

View the bottom table in Specifications to see the effect of objectives and eyepieces on working distance, zoom range, and the visual field.

Ball Bearing Boom Stand

This boom stand provides a smoothly operating, non-rotating motion that is ideal for TEV-700 (oocyte) applications, as well as for all applications requiring a dissecting scope. (Trinocular viewing head shown.)

Zoom Stereo Microscope Series (Z850)

Standard Boom Stand

This boom stand features safety tracks on the horizontal arm and Delrin®inserts in the focus block to ensure smooth, precise movements.

​​​​​​​​Stereo Zoom Microscope with Boom Stand (Z850)
Optical System Twin zooming objective
Viewing Bodies Binocular or Trinocular with 50/50 light split
ESD Protection Viewing body is made from anti-electrostatic materials
Anti-Mold Anti-mold and airtight design
Magnification 0.8x to 5.0x with click stops at 1x, 2x, 3x, 4x and 5x
Zoom Ratio 6.3:1
Working Distance 115mm (4.5 inches)
Viewing Angle 45 degrees
Interpupillary Distance Adjustment 52mm - 75mm
Camera Adaptability 0.4x or 0.5x c-mount adapters, photo tube
Eyepieces (with diopter adjustment) WF10x/22mm with reticle holder (reticle size: 27mm),WF15x/16mm with reticle holder (reticle size: 20mm), WF20x/12.5mm
Auxiliary Objectives 0.5x (211mm working distance) and 2.0x (43.5mm working distance)
Boom Stand Base dimensions: 254mm x 254mm (10" x 10"),Vertical Post - 365mm, Horizontal Post - 518mm. Physical weight 37 lbs.
Ball Bearing Boom Stand Base dimensions: 254mm x 254mm (10" x 10"),Vertical Post - 394mm, Horizontal Post - 585mm. Physical weight 42 lbs.
FlexArm/Swing Arm Stand The Swinging Arm has a 3 foot scanable range and a lockable 14.5" vertical motion range with an adjustable counterbalanced support. Horizontal or vertical clamp mount
Light Sources LED ring & fluorescent ring lights, Fiber Optic illuminators
Digital Camera System Micrometrics® CCD and CMOS cameras with image analysis software


Auxiliary Objective Working Distance (mm) EYEPIECE
WF10X/22 WF15X/16 WF20X/12.5
Total magnification Visual Field (mm) Total magnification Visual Field (mm) Total magnification Visual Field (mm)
  115 8-50X 27.5-4.4 12-75X 20.0-3.2 16-100X 15.6-2.5
0.5X 211 4-25X 55.0-8.8 6-37.5X 40.0-6.4 8-50X 31.2-5.0
2X 43.5 16-100X 13.8-2.2 24-150X 10.0-1.6 32-200X 7.8-1.3


Customers from Europe and Australia can use the Multi Channel Systems - Online Shop to order Warner products or create quotes.

Order No. Model No. Product Description USA Price Order
Binocular Scopes
64-1835 Binocular stereo microscope, 8-50x zoom, ball bearing boom stand, includes 10X eyepieces Login Login
Trinocular Scopes
64-1805 Trinocular stereo microscope, 8-50x zoom, ball bearing boom stand, includes 10X eyepieces Login Login
Accessories and Replacement Items
64-1829 Universal boom stand, horizontal arm with bonder port, base dimensions 10x10", 14-3/8" vertical post, 20-3/8" horiztonal post (order with 64-1834 bonder arm) Login Login
Accessories and Replacement Parts
64-1830 Ball bearing boom stand, horizontal arm with bonder port, base dimensions 10x10", 15.5" vertical post, 23" horizontal arm (order with 64-1834 bonder arm) Login Login
64-1831 Ball bearing boom stand extension post Login Login

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