Top left: Cat# 146 W.F., 4 element design.  top right: The later, Cat# 176 W.F., 3-element design.  Bottom: A cornucopia of eyepieces from the AO Blue Book (late 1940's)

An AO Spencer  Eyepieces Reference

Using the various available manuals and catalogs it is possible to construct a reference of Cat #'s (Catalog Numbers) and Eyepieces that may be useful in finding eyepieces for your AO Spencer microscope.   

Looking for instructions on reticles?  Look Here.


Eyepieces are quite forgiving can be used interchangeably on 160mm TL and Infinity corrected scopes with good results for instance, or often, between scopes of different makers.  A very practical, simple introduction to microscope eyepieces can be found here.  But don't miss reading the sections at the Olympus Resource Site and the Nikon's Microscopy Site.  Eyepieces designed for telescopes must meet differing needs than those for microscopes, but even so, a very interesting piece is found here.

*Note: The 'purist' in me wants to note that the very best, optimum results will be obtained by using the eyepieces specifically  made for each objective set (e.g.  a Cat# 146 10x eyepiece on a 160mm TL Series 2 scope, a Cat# 176 10X eyepiece on an infinitely corrected Series 10 scope, etc.) -- but the 'practical side' of me says it really, truly doesn't make a heck of a lot of difference -- use what you have.  But if you are wondering what the differences might be between different brands of eyepieces, Mervhob of Yahoo's Microscope Group has furnished the useful information below (also see Mikrofibel page 55) :

Table of Eyepiece Distance to First Image

Maker

From Top of Body Tube (mm)

From Objective Shoulder (mm)

Mechanical  Tube Length

Zeiss-Winkel

5

155

160

Zeiss (Old pre 1948)

15

145

160

Zeiss (Oberkochen)

10 (old 13)

150 (old 147)

160

Reichert

13

147

160

Reichert (metal.)

13

177

190

Leitz

18

152

170

Leitz (metallurgical)

18

197

215

Leitz (Ultropak)

18

167

185

A. O. Spencer

11.3

148.7

160

Bausch & Lomb

11

149

160

B & L (metallurgical)

11

204

215

C. Baker

0

160

160

C. T. S.

20

140

160

Beck

10

150

160

Beck (metallurgical)

10

190

200

Wild Heerbrugg 9 151 160
PZO 10 150 160
Olympus (Tokyo) 16 144 160

You can see that B&L (Bausch & Lomb) eyepiece are very close to the same specifications as AO eyepieces.  It is quite common to find B&L eyepieces on AO scopes and, probably, vice-versa.  Amazingly, you'll often find B&L objectives on AO scopes, without an shims, even though their parfocal distance is 35.6mm vs. the 34mm distance for AO Objectives.

Also, in a Yahoo Microscope forum thread , Wayne Buttermore sheds some light on the different catalog numbers for some of the eyepieces at least: 

Re: AO Eyepiece 176 and 176A, interchangeable?

"As long as the 176 and 176A are used as a pair, they are interchangeable. As pointed out, the objectives from the Series 10 and Series 110 were the same design so there are no compatibility issues. Price was not a factor at the time of the change, engineering changes dictate a new catalog number for inventory control. Wayne"


OK, Here is a list of the AO and Spencer Eyepieces 'known' to me from either experience, or from the AO Spencer Literature (i.e. a catalog or a manual).  (Note: You can select the whole list, top to bottom, and past it into Excel to create a spreadsheet that can be sorted on any column if you'd like)

Sources:

#1 = 110 Objectives Catalog #7 = AO 120 Manual #13 = Series 15 & 35 Catalog #19 -- AO Cycloptic Catalog
#2  = Series 10 Phase Catalogs #8 = 1969 Series 10 Manual #14 = Series 15 & 35 Phase Catalog #20 -- Reichert-Jung 'Inserting and Calibrating Reticules' manual
#3 = Epi Lume Catalog #9 = eBay or have used one #15 = The AO Blue Book #21 -- AO StereoStar/Zoom Catalog
#4 = AO Starlight Catalog #10 = Series 2 & 4 Catalog #16 - Microstar IV manual #22 -- No. 580 StereoStar Zoom 'T' Photomicrographic Systems Reference Manual
#5 = BioStar Inverted Catalog #11 = Series 2 & 4 Phase Catalog #17 -- Series 120 manual #23 -- AO Photomicrographic Cameras 1052B, 1053B, 1055B Reference Manual
#6 = AO 60 Manual #12 = Series 10 Phase Manual #18 -- Series 110 Catalog #24 -- AO PolStar Brochure

Note: A 'C' at the beginning of the Cat# means 'C'oated (1950's era).  Before this, eyepieces evidently did not have coatings, after this era, all eyepieces were coated so the 'C' was dropped.

Cat# Power Type FN, or Field Width,  in mm Eye relief in mm Comments Source
133 5 Huy.         13 
(C)133*  5 Huy. 19 8.6 Series 2/4, Series 10 10
134 10 W.F.     StereoStar 569, 571, 572 21
135 10 W.F       13
136 5 Huy.       15
137 15 W.F       13
138 6 Huy.       15
139 20 W.F       13
140 8 Huy.       13
142 10 Huy.       13
(C)142* 10 Huy.     Series 2/4 10
143 16 Huy.       13
144 12 Huy.       13
145 10 W.F.     StereoStar 570 21
145P 10 W.F.     'Field of View' focusing, photo eyepiece, with reticle -- StereoStar 22
146** 10 W.F.     Series 2/4 11
147** 15 W.F.        19
147B 15 W.F         20
156 2 Barlow       19
157 20 W.F. 12 10 Series 10 8
161 10 W.F.     Student scopes 9
165 8 Comp. -- High E.P.       15
166 5 Comp.             15
(C)166 5 Comp.     Series 2/4 10
167 10 Comp. -- High E.P.             15
(C)167 10 Comp. -- High E.P.     Series 2/4 10
168 10 Comp.            15
(C)168 10 Comp.     Series 2/4 1
169 12 Comp.       15
170 15 Comp.          15
(C)170 15 Comp.     Series 2/4 10
(C)172 20 Comp.       15
174 30 Comp.       15
176 10 W.F. 19 21 Series 10 8
176A 10 W.F. 20? 19.6? Series 110, 120 18
177 5 Ramsden       15
177* 10 Huy. 15 7.9 Series 10 8
178 10 Ramsden       15
179 15 Ramsden       15
180 10 W.F. 20 19.6 Series 120 17
181 10 Huy. -- Phase, High E.P.          14
181* 10 W.F. 20   Microstar IV  (410) 16
182 15 Huy. -- Phase, High E.P.         14
182* 15 W.F. 17   Microstar IV  (410) 16
183 ? ? ? ? Found on an AO 150 in a Yahoo Microscope forum thread ?
184 9 Stereo Mic.       15
184 15 W.F. 17 14 Series 10 8
185 12 Stereo Mic.       15
186 15 Stereo Mic.            15
186* 25 W.F.     StereoStar  569, 570, 572, 572 21
187 18 Stereo Mic.         15
437 10 W.F. Focusable. Projection?       19
D550 10 Comp.       Not W.F; probably for the later 'black' scopes 9
1054 10  W.F.     'Field of View' focusing, photo eyepiece, with reticle -- Series 10/20 23
1890 10 W.F.     Series 110 PolStar, with cross-lines 24

*Unlike, in the case of objectives where I only know of one case, AO liberally reused eyepiece catalog #'s 'tromping over the top of' older eyepiece #'s  -- it seems strange to have done so, but they did.

**Jim Jennings kindly notes: "It seems that the AO/Reichert Cycloptic stereo microscopes used Cat. 146 and Cat. 147 eyepieces. When these were sold as a pair, they became numbers 1146 and 1147 respectively."

A useful manual covering installation of eyepiece reticules, "Reichert-Jung: Inserting and Calibrating Eyepiece Reticules"  for many of the above eyepieces can be found here.

Above:  Eyepieces in 1924 (left) and 1929 (right) from the Spencer Lens Catalog of those years


 

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The images, articles, and concepts of this page are copyrighted by P.S. Neeley -- copyright 2005