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How to Choose Your Video Coupler

Field of View, Monitor vs., Eyepiece

The first question that most people as is: "How much of what I see through the eyepieces will appear on the monitor?"  The field of view diagrams presented here will help to answer that question.

In each diagram, the circles represent the field of view seen through the microscope eyepieces.  The rectangles represent the image that will appear on the TV monitor (or computer screen).

Each circle corresponds to a certain "field number" (FN) eyepiece.  Eyepieces with wider fields have larger field numbers.  The field number is usually engraved on the eyepiece right after the magnification, as in WFK 10x/20.  In this example, FN = 20. 

Video Cameras (1 CCD) 
Select the field of view diagram according to the size of the chip in your camera and on whether the HR or the HRP series is to be used.  

3 CCD Video Cameras
Select the field of view diagram according to the size of the chips in your camera.  Diagrams apply to both bayonet mount and the new C-mount versions. 

Cooled Chip & Kodak MEGAPLUS
You will have to know the part number of the chip in your camera.  Search among the four diagrams for the corresponding coupler and resultant field of view.  Example:  Kodak KAF-1400 chip is found in HRP060 diagram. Diagrams apply to both Nikon F mount and C mount versions.

Leaf Lumina Camera
This is the field of view when the camera is used in the full resolution mode. 

Kodak DCS Series Cameras
The field of view for the DCS200 and the DCS420 cameras is illustrated using a HRP100-NIK coupler.   The field of view for the DCS and DCS100 cameras is illustrated in the Cooled Chip / Megaplus HRX200-NIK diagram.

 

Field of View, on the Specimen

The second question that most people ask is: "I know how big my specimen is.  Will I be able to see it all on my monitor?".  This leads us into a discussion of what the field of view will be in the plane of the specimen.

This is actually quite an easy thing to figure out.  First, remember that whatever image lands on the chip will be displayed on the monitor.  The monitor, no matter what size, will display the image.  Knowing this, we just have to figure out what portion of the specimen will end up being imaged on the chip. This depends on just three things:  the objective magnification, the coupler magnification, and the dimensions of the chip.

To find the field of view on the specimen that will be displayed on the monitor you would divide each of the chip dimensions (chip height and chip width) by the product of the objective magnification and the coupler magnification.  

NOTE:  In this discussion, we have assumed that an "underscanned" monitor was used.  An underscanned monitor displays an image slightly smaller that the picture tube.  This means that every pixel on the camera chip will get displayed on the monitor.  "Overscanned" monitors display an image that is slightly larger than the picture tube, which means that the pixels on the edges of the images are lost. 

Equations
Example
(The squeamish can fast forward to the tables following this section)

Let us define:
What is the field of view on the specimen if a 20x objective, a 0.42x coupler and a 1/3" chip camera are used?
  Fh = specimen field height
  Fw = specimen field width

  Ch = chip height

  Cw = chip width

  Mo = objective magnification

  Mc = coupler magnification

Then specimen field height is given by:

  Fh = Ch / (Mo x Mc)

And specimen field width is given by:

  Fw = Cw / (Mo x Mc)

 

First we get the chip dimensions from the table under "Equations":

  Ch = 3.6mm

  Cw = 4.8mm

We know the microscope objective magnification and the coupler magnification:

  Mo = 20

  Mc = 0.42

We can now calculate the specimen field height and width:

  Fh = Ch / (Mo x Mc)

       = 3.6mm / (20 x 0.42)

       = 0.43mm

  Fw = Cw / (Mo x Mc)

        = 4.8mm / (20 x 0.42)

        = 0.57mm

The field of view on the specimen would be 0.43mm high by 0.57mm wide.  

Table of Common Chip Dimensions:
  1/3" format 3.6mm x 4.8mm
  1/2" format 4.8mm x 6.4mm
  2/3" format 6.6mm x 8.8mm
  1" format 9.6mm x 12.8mm

 

for 1/3' chips

specimen field of view (mm) for different objective magnifications (rows) 
and coupler magnification (columns)

  0.42x 0.45x 0.55x 0.6x 0.7x 1x 2x 3.1x
1x 8.57 x 11.4 8.00 x 10.7 6.55 x 8.73 6.00 x 8.00 5.14 x 6.86 3.60 x 4.80 1.80 x 2.40 1.16 x 1.55
2x 4.29 x 5.71 4.00 x 5.33 3.27 x 4.36 3.00 x 4.00 2.57 x 3.43 1.80 x 2.40 0.900 x 1.20 0.581 x 0.774
4x 2.14 x 2.86 2.00 x 2.68  1.64 x 2.18 1.50 x 2.00 1.28 x 1.71 0.900 x 1.20 0.450 x 0.600 0.290 x 0.387
10x 0.857 x 1.14 0.800 x 1.07 0.655 x 0.873 0.600 x 0.800 0.514 x 0.686 0.360 x 0.480 0.180 x 0.240 0.0116 x 0.155
20x 0.429 x 0.571 0.400 x 0.533 0.327 x 0.436 0.300 x 0.400 0.257 x 0.343 0.180 x 0.240 0.0900 x 0.120 0.0581 x 0.0774
40x 0.214 x 0.286 0.200 x 0.267 0.164 x 0.218 0.150 x 0.200 0.128 x 0.171 0.0900 x 0.0120 0.0450 x 0.0600 0.0290 x 0.0387
100x 0.0857 x 0.114 0.0800 x 0.107 0.0655 x 0.0873 0.0600 x 0.0800 0.0514 x 0.0686 0.0360 x 0.0480 0.0180 x 0.0240 0.0116 x 0.0155

 

for 1/2" chips

specimen field of view (mm) for different objective magnifications (rows) 
and coupler magnifications (columns)

  0.42x 0.45x 0.55x 0.60x 0.7x 1x 2x 3.1x
1x 11.4 x 15.2 10.7 x 14.2 8.73 x 11.6 8.00 x 10.7 6.86 x 9.14  4.80 x 6.40 2.40 x 3.20 1.55 x 2.06
2x 5.71 x 7.62 5.33 x 7.11 4.36 x 5.82 4.00 x 5.33 3.43 x 4.57 2.40 x 3.20 1.20 x 1.60 0.774 x 1.03
4x 2.86 x 3.81 2.67 x 3.56 2.18 x 2.91 2.00 x 2.67 1.71 x 2.29 1.20 x 1.60 0.600 x 0.800 0.387 x 0.516
10x 1.14 x 1.52 1.07 x 1.42 0.873 x 1.16 0.800 x 1.07 0.686 x 0.914 0.480 x 0.640 0.240 x 0.320 0.188 x 0.206
20x 0.571 x 0.762 0.533 x 0.711 0.436 x 0.582 0.400 x 0.533 0.343 x 0.457 0.240 x 0.320 0.120 x 0.160 0.0774 x 0.103
40x 0.286 x 0.381 0.267 x 0.356 0.218 x 0.291 0.200 x 0.267 0.171 x 0.229 0.0120 x 0.160 0.0600 x 0.0800 0.0387 x 0.0516
100x 0.114 x 0.152 0.107 x 0.142 0.0873 x 0.116 0.0800 x 0.107 0.0686 x 0.0914 0.0480 x 0.0640 0.0240 x 0.0320 0.0155 x 0.0206

 

for 2/3" chips

specimen field of view (mm) for different objective magnifications (rows) 
and coupler magnifications (columns)

  0.42x 0.45x 0.55x 0.60x 0.7x 1x 2x 3.1x
1x NR NR NR 11.0 x 14.7 9.43 x 12.6 6.60 x 8.80 3.30 x 4.40 2.13 x 2.84 
2x NR NR NR 5.50 x 7.33 4.71 x 6.29 3.30 x 4.40 1.65 x 2.20 1.06 x 1.42
4x NR NR NR 2.75 x 3.67 2.36 x 3.14 1.65 x 2.20 0.825 x 1.10 0.532 x  0.710
10x NR NR NR 1.10 x 1.47 0.943 x 1.26 0.660 x 0.800 0.330 x 0.440 0.213 x 0.284
20x NR NR NR 0.550 x 0.733 0.471 x 0.629 0.330 x 0.440 0.165 x 0.220 0.106 x 0.142
40x NR NR NR 0.275 x 0.367  0.263 x 0.314 0.165 x 0.220 0.0825 x 0.110 0.0532 x 0.0710
100x NR NR NR 0.110 x 0.147 0.0943 x 0.126 0.0660 x 0.0880 0.0330 x 0.0440 0.0213 x 0.0284

Magnification

Let's say that you take a ruler out and measure the length of the image of a bug on your screen to be 115mm.   You wonder out loud "how long is my bug,...really?"  The answer is:  the real length of the bug is the screen measurement (115mm) divided by the overall magnification between the bug and the screen.

The overall magnification between the bug and the screen is the product of the optical and the electronic magnifications between the bug and the screen.   The optical magnification is the product of the objective magnification and the coupler magnification.  The electronic magnification is the ratio of the monitor diagonal measurement to the chip diagonal measurement.  (Use the same units, don't mix inches and millimeters).

Equations
M =  overall magnification
Mo = objective magnification
Mc =  coupler magnification
Dm = video monitor diagonal
          measurement (mm)
Dc = chip diagonal measurement (mm)

The overall magnification is given by:
M = MO x Mc x (Dm / Dc)

The actual specimen dimension is:
actual specimen dimension = dimension on screen / overall magnification

Example
You are using a 2x objective, a 0.45x coupler, a  1/2" chip and a 27" monitor.  The length of the image of the bug on the monitor is 115mm.  What is the real length of the bug?

Mo = 2
Mc = 0.45
Dm = 27" = 686mm

The 1/2" chip is 4.8mm x 6.4mm (see table on previous page).  We use the Pythagorean Theorem to find the diagonal.

Dc = square root of [(4.82)2 + (6.4)2]
     = 8mm

The overall magnification (bug to screen) is:
M = Mo x Mc x (Dm / Dc)
    = 2 x 0.45 x (686mm / 8mm) = 77.2

The real length of the bug is:
real length of bug = length of bug on screen / overall magnification
  = 115mm / 77.2
  = 1.49mm

Selecting a Coupler and a Bottom Clamp

HR / HRP / HRT Video Coupler
The video coupler series is available for a variety of camera mounts including:

  • C-mount for single chip and 3-chip cameras
  • Bayonet style for 3-chip cameras (Sony and non-Sony)
  • Nikon "F" bayonet style for cooled chip cameras and Kodak digital cameras

Each camera mount is available in a variety of magnifications which allows the user to achieve the desired field of view size for various CCD formats (1/3", 1/2", 2/3", etc.).  See insert pages for field of view size illustrations.  All couplers are adjustable for parfocality between the microscope and TV monitor.

Microscope Bottom Clamp
Because microscope phototubes vary greatly in size and dimensions, we use a variety of microscope bottom clamps to adapt our video couplers to virtually every microscope in the marketplace.  These clamps slide over the end of the video coupler and provide for secure attachment to the microscope.

      C-Mount Style                                                  
      Found on:
       -  Single chip CCD cameras
       -  Some 3-chip CCD cameras
       - Some Cooled Chip CCD cameras
       - Some Digital Cameras

 


                     Bayonet Style
                    
(Four types of bayonet style)
       1/2" Sony
       1/2" non-Sony
       2/3" format

       Found on:
        - 3-chip CCD cameras

                     Nikon "F" bayonet style:

                     Found on:
                     - Cooled CCD cameras
                     - Kodak DCS & Megaplus
                     - Other digital cameras

  1. Identify the lens mount used on your camera.  Turn to the matching video coupler selection chart.  If using a Kodak digital camera, see the dedicated chart.
  2. Identify the CCD format size used in your camera.  Look under the corresponding column heading.  In the cooled CCD chart, the format size is indicated by the length and height of the chip.  If using a Kodak digital camera, simply identify the camera model in the chart (CCD format size and model number are also given for confirmation).
  3. Choose the video coupler to achieve the desired field of view.  Couplers are listed by catalog number and in order of increasing magnification.  The lowest magnification will give the widest field of view on the TV monitor for a given CCD format size.  See insert pages for complete field of view illustrations and explanation about choosing an appropriate magnification.  
  4. Select the appropriate bottom clamp from the "Microscope Bottom Clamp Chart" on the back page.  First identify the microscope manufacturer.  Then identify the microscope type (compound, stereo, or inverted).  Finally, identify the model and appropriate bottom clamp.

Example:  The customer wants to adapt a Sony DXC-960 3-chip bayonet mount camera with a 1/2" format CCD chip onto a Nikon Optiphot.  The customer wants the widest field of view possible on the TV monitor.

Recommended Video Coupler:
      Recommended Bottom Clamp:
HRT045-ENG12                          OC-CLAMP

Understanding the Video Coupler Catalog Numbers

HRT 

045 -ENG12

 

HRT

Designates Coupler Series:

HR -    Standard series used only in C-Mount version.  Not recommended
            for high NA objectives.
HRP -  High resolution series for use with apochromats, fluorites, and
            research grade plan achromats.  Available for all camera mount
            types.
HRT -  High resolution series specifically designed for 3-chip cameras. 
            Available in bayonet and C-mount.
HRX - Special configuration for very large CCD's used in cooled chip and
           digital cameras.  (Does not use bottom clamp system, must specify
           scope.

045

Designates Magnification:

042 = 0.42x
045 = 0.45x
055 = 0.55x
060 = 0.60x
070 = 0.70x
100 = 1.0x  
200 = 2.0x  
250 = 2.5x  
310 = 3.1x  
400 = 4.0x  

 

-ENG12

Designates Camera Mount

-CMT =  C-mount
-NIK =  Nkon "F" bayonet mount 
-ENG12 =  Bayonet mount for Sony
                   3-CCD cameras with 1/2"
                   format chips
ENG12NS = Bayonet mount for non-Sony
                      3-CCD cameras with 1/2"
                      format chips
-ENG23 = Bayonet mount for all 3-CCD
                  cameras with 2/3" format chips  

Recommended Video Coupler Charts

CAUTION: When to Use the HRP Version

NOTE: Both HR and HRP series couplers are listed as choices for 1/2", 2/3", and 1" format single CCD cameras.  The HR series will produce a sharp, flat-field image with objectives that have up to a "standard" Numerical Aperture for their magnification (see table below).  As for the Numerical Aperture (NA) of the objective goes higher than the "standard NA," the image will begin to lose sharpness outside of the center field of view area.  The HRP series has been designed to give a sharp, flat-field image with all objectives including apochromats, fluorites, and research grade plan apochromats, fluorites, and research grade plan achromats.  The HRX series couplers will also work fine with high NA objectives.

Use the HRP version if the...

                            Objective                    and the NA is
                        magnification is:                 greater than:
                                1x                                   0.02
                                2x                                   0.04
                                4x                                   0.08
                              10x                                   0.20
                              20x                                   0.40
                              40x                                   0.80
                            100x                                   1.30

C-Mount Single Chip Cameras (for Kodak digital C-Mount cameras, see below)

CCD Format Size
(Active Area)

1/3"
(3.6mm x 4.8mm)
1/2"
(4.8mm x 6.4mm)
2/3"
(6.6mm x 8.8mm)
1"
(9.6mm x 12.8mm)
RECOMMENDED COUPLERS
Catalog Number






HRP SERIES
HRP042-CMT
HRP060-CMT
HRP100-CMT
HRP SERIES
HRP042-CMT
HRP060-CMT
HRP100-CMT
HRP SERIES
HRP060-CMT
HRP100-CMT
HRP SERIES
HRP100-CMT

HR SERIES
HR055-CMT
HR070-CMT
HR100-CMT
HR200-CMT
HR310-CMT
HR SERIES
HR055-CMT
HR070-CMT
HR100-CMT
HR200-CMT
HR310-CMT
HR SERIES
HR070-CMT
HR100-CMT
HR200-CMT
HR310-CMT
HR SERIES
HR100-CMT
HR200-CMT
HR310-CMT

 

Bayonet Mount 3-Chip Cameras

CCD Format Size
(Active Area)
1/2" (Sony cameras)
(4.8mm x 3.6mm)
1/2" (non-Sony cameras)
(4.8mm x 3.6mm)
2/3" (Sony and non-Sony cameras) 
(6.6mm x 8.8mm)
RECOMMENDED COUPLERS
Catalog Number
HRT045-ENG12
HRP060-ENG12
HRP100-ENG12
HRT045-ENG12NS
HRP060-ENG12NS
HRP100-ENG12NS
HRP060-ENG23
(parfocal but 
no adjustment)
HRP100-ENG23

 

C-Mount 3-Chip Cameras

CCD Format Size
(Active Area)
1/3" 
(3.6mm x 4.8mm)
1/2"
(4.8mm x 6.4mm)
RECOMMENDED COUPLERS
Catalog Number
HRT045-CMT

HRT045-CMT

 

Nikon "F" Bayonet Mount Cooled Chip Cameras

Chip Manufacturer Kodak Kodak Kodak Kodak Thomson CSF Thomson CSF Thomson CSF
Chip Model Number KAF0400 KAF1400 KAF4200 KAF-3600 TH 7883-PM TH 7895B TH 7896A
CCD Format Size (6.9mm x 4.6mm) (8.98mm x 7.04mm) (18.4mm x 18.4mm) (27.65mm x 18.48mm) (8.8mm x 13.2mm) (9.7mm x 9.7mm) (19.5mm x 19.5mm)
RECOMMENDED COUPLERS
Catalog Number
Note:  HRX series does not use bottom clamp.  Please specify microscope type.
HRP042-NIK
HRP060-NIK
HRP100-NIK
HRP200-NIK
HRP250-NIK
HRP400-NIK

HRP060-NIK
HRP100-NIK
HRP200-NIK
HRP250-NIK
HRP400-NIK


HRX200-NIK
HRX250-NIK
HRX400-NIK




HRX200-NIK
HRX250-NIK
HRX400-NIK




HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK



HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK



HRX200-NIK
HRX250-NIK
HRX400-NIK




 

Kodak Digital Cameras with Nikon "F" Bayonet Mount or C-Mount

Camera Model DCS100 DCS200 & DSC420 MEGAPLUS 1.4 & XRC MEGAPLUS 1.6 MEGAPLUS 4.2 MODEL XHF
Chip Model Number ME M5 KAF-1400 KAF-6300 KAF-4200 KAI 1001
CCD Format Size (16.4mm x 20.5mm) (9.3mm x 14.0mm) (8.98mm x  7.04mm) (14.0mm x 9.29mm) (18.4mm x 18.4mm) (9.22mm x 9.22mm)
RECOMMENDED COUPLERS
Catalog Number
Nikon "F" Bayonet Style
Note: HRX series does not use bottom clamp. Please specify microscope type.
HRX200-NIK
HRX250-NIK
HRX400-NIK






HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK





HRP060-NIK
HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK




HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK





HRX200-NIK
HRX250-NIK
HRX400-NIK






HRP100-NIK
HRX200-NIK
HRX250-NIK
HRX400-NIK





Catalog Number
C-Mount Version
N/A N/A HRP060-CMT   
HRP100-CMT   
HRX200-NIK    
HRX250,           
 or       
HRX400-NIK    
 with     
NIKL-CMTC     

HRP100-CMT
HRX200-NIK,
HRX250-NIK, or
HRX400-NIK with
NIKL-CMTC


HRX200-NIK,
HRX250-NIK,
or
HRX400-NIK 
with
NIKL-CMTC 



HRP100-CMT
HRX200-NIK,
HRX250-NIK,
or
HRX400-NIK 
with
NIKL-CMTC 


 

Microscope Bottom Clamp Chart

     
MICROSCOPE AMERICAN OPTICAL BOTTOM CLAMP
COMPOUND Microstar 10, 110, 120 and Epistar (use P-CLAMP if 25mm phototube is available) A01-CLAMP
Diastar (use P-CLAMP if 25 mm phototube is available) A02-CLAMP
  AUS JENA BOTTOM CLAMP
COMPOUND Jenaval J-CLAMP
  BAUSCH & LOMB BOTTOM CLAMP
COMPOUND Balpan & MicroZoom (use P-CLAMP if 25mm phototube is available) BL1-CLAMP
STEREO StereoZoom 6 (use P-CLAMP if 25mm phototube is available) BL1-CLAMP
StereoZoom 7 with 31-27-17 camera kit (use P-CLAMP if 25mm phototube is available) BL2-CLAMP
StereoZoom 7 with older 31-27-07 camera kit, threaded port (use P-CLAMP if 25mm phototube is available) CALL FOR PRICING
  LEICA (FOR STEREOZOOM 6 & 7, SEE BAUSCH & LOMB) BOTTOM CLAMP
COMPOUND DMR series, fits FSA tube adapter, TV tube adapter, Variotube and DMRD (does not fit photo TV module) L-CLAMP
  LEITZ BOTTOM CLAMP
COMPOUND Dialux, Laborlux, Ortholux, Orthoplan, Diaplan, Ergolux, Aristoplan, Aristomet, Metallux (for all models, inserts into 38mm ISO photoport) NLW-CLAMP
INVERTED Diavert, Labovert, Fluovert, Metallovert NLW-CLAMP
  MITUTOYO BOTTOM CLAMP
COMPOUND


Finescope FS60 (non-tilting head) FS60-CLAMP
Finescope FS60 (tilting head) FS60T-CLAMP
Finescope FS110 FS110-CLAMP
  NIKON BOTTOM CLAMP
COMPOUND





Optiphot, Labophot, Alphaphot O-CLAMP
Optiphot-2, Labophot-2, Alphaphot-2 (with phototube), Multi-image
module (into photo adapter), Microphot (w/Nikon phototube #79429)
O-CLAMP
Optiphot-2, Labophot-2, Alphaphot-2 (with phototube removed; inserts into 38mm ISO photoport) NLW-CLAMP
Fluophot, Metaphot, Biophot FM-CLAMP
STEREO




SMZ-U (with phototube), SMZ-2T O-CLAMP
SMZ-U without phototube (inserts into 38mm ISO photoport) NLW-CLAMP
SMZ-10 (CAUTION: SMZ-10 contains 0.6x reduction lens.  This must be taken into consideration when choosing a HR/HRP coupler) S-CLAMP
SMZ-1 (clamps to eyepiece tubes) SMZ1-CLAMP
INVERTED

Diaphot TMD, Diaphot 300 / 200 (with side port phototube), TMS-F O-CLAMP
Diaphot 300 / 200 with side port phototube removed (inserts into 38mm ISO photoport) NLW-CLAMP
MEASURING Measuring microscopes MM-11C, MM-11U, MM-22, MM-22U O-CLAMP
TOOLMAKERS TM-10 toolmakers microscope TM-CLAMP
  OLYMPUS BOTTOM CLAMP
COMPUND



BH-2 series (BHS, BHT, BHTU), VANOX (with AH2-ADF for new VANOX), B-MAX series (with U-SPT phototube) V-CLAMP
B-MAX series (with U-SPT phototube removed), B-MAX U-DPT double port (Back port only, front port uses V-CLAMP)  BMX-CLAMP
BH, CH, and Ch-2 series (with 25mm phototube) P-CLAMP
STEREO
SZH and SZ series (with phototube) V-CLAMP
SZIII-TR and X-TR series (with 25mm phototube) P-CLAMP
INVERTED
IMT-2 sideport or trinoc head V-CLAMP
CK and CK-2 series (with 25mm phototube) P-CLAMP
  RATHENHOWER BOTTOM CLAMP
STEREO SMC stereo photoport RTH-CLAMP
  REICHERT / CAMBRIDGE INSTRUMENTS BOTTOM CLAMP
COMPOUND

Microstar IV and Diastar (use P-CLAMP if 25mm phototube is available) A02-CLAMP
Polyvar-2, side port on DUAL REFLEX MODULE (TV image will be mirror of eyepiece image) RPV2-CLAMP
INVERTED MEF3, sideport on DUAL REFLEX MODULE (TV image will be mirror of eyepiece tube) MEF3-CLAMP
  UNITRON BOTTOM CLAMP
STEREO SMC stereo photoport RTH-CLAMP
  WILD BOTTOM CLAMP
STEREO All newer stereos with removeable phototubes that reveal 38mm ISO photoport NLW-CLAMP
Older stereos w/non-removeable phototube (33mm OD phototube) ZW-CLAMP
  ZEISS BOTTOM CLAMP
COMPOUND



Axioscop, Axiolan, Axiophot, Axiotron Z-CLAMP
Axiolab, new Standard trinoc (Zeiss Part#45 29 03 or 45 29 02) ZN-CLAMP
Universal, Photomicroscope II & III, UEM, Ultraphot IIIB (replaces phototube) ZU-CLAMP
Old Standard trinoc with 25mm OD Phototube P-CLAMP
STEREO

SV6, SV11, stereo phototube (Zeiss #45 50 80), Stemi 2000-C ZN-CLAMP
Zeiss Stereos with non-removeable phototube (Zeiss part #47 50 83 and 47 50 84), typically models SR, DR, DRC and SV8 ZW-CLAMP
INVERTED



Axiovert Models 100, 135, and 135M, IM series
when used w/new Standard trinoc (Zeiss part #45 29 03)
ZN-CLAMP
Axiovert models 10, 35, 35M, 405M Z-CLAMP
IM-series when used w/old Standard trinoc w/25mm OD phototube P-CLAMP
  EYEPIECE TUBE BOTTOM CLAMP
EYEPIECE with 23.2mm inside diameter, outside diameter range 25mm-40mm B-CLAMP

 

 

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