Wizard of Wetzlar- Arthur Seibert

MTC Photography · April 16, 2000

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<TITLE>emoscope</TITLE>

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<CENTER>Wizard of Wetzlar - Arthur

Seibert</CENTER>

.

Arthur Seibert (

1906- 1980) was

Ernst Leitz lens designer from 1920 to 1947.

In 1948 Seibert left Leitz and undertook the task

of designing a subminature lens for Minox camera .

Arthur Seibert

was a great optics designer, his most

famous designs were the five element Pentar lens of Minox II and

the COMPLAN lens for Minox III/IIIs/B, and early Minox C. The Pentar

and COMPLAN are still two of the sharpest subminature

lenses-- in fact the sharpest of any commercial photographic lenses

In 1951, Arthur Seibert formed his

own optik company

<TR>

<CENTER> EMO-OPTIK

Arthur Seibert emo

Wetzlar West Germany</CENTER>

<CENTER>Werk fur Elektronik und Optik</CENTER>

<CENTER>Hornsheim Eck 11 35524</CENTER>

<CENTER>Wetzlar Germany</CENTER>

</TD>

</TR>

</TABLE></CENTER>

<UL>Many of EMO's products are masterpieces of optical

design, for example</UL>

<UL>

<LI>

Highly corrected EMO Wetzlar 5x Macromax loup</LI>

<LI>

Emoskop : this marvel is a telescope,

a microscope and three loups all in a 2" tube.</LI>

<LI>

Octoskop : A combination loup with

eight magnifications: 2x 4x 6x 10 x 14x 18x 20x 28 x .</LI>

</UL>

<CENTER>emoskop</CENTER>

Emoskop is a combination of telescope,

microscope and magnifier in a pocket package.

<UL>It is the optical equivalent of a Swiss Army knife.</UL>

EMO

SEIBERT EMOSKOP

The orginal emoskop

has the following engraving on the tube

<TR>

<TD>\||||||||||||||||||

<TR>

</TR>

</TABLE></CENTER>

<CENTER>SEIBERT</CENTER>

<CENTER>Wetzlar/Germany</CENTER>

</TD>

</TR>

</TABLE></CENTER>

<CENTER> EMO-SEIBERT emoskop</CENTER>

The top end of the eyepiece has a milled

band; the bottom of emoskop has two engraved chrome rings.

The small black leather case fits the emoskop

without the stand.

The original EMO Seibert emoskop is the prettiest.

It is also scarce.

The Emoskop is made

of metal , very compact, when assembled in to a microscope,

it ss about 21mm in diameter and 42 mm long.

<TR>

<TD ALIGN=CENTER HEIGHT="50" BGCOLOR="#000000">)

() ()</TD>

</TR>

</TABLE></CENTER>

A

B

C

Emoskop consists of

three lenses. Lens A,B,C

each has its own housing

<UL>

<LI>

Lens A is a cemented

two element achromatic lens of negative power , it is the the

eye piece of telescope and microscope. Lens A is mounted at

one end of a tube, which goes into lens B tube.</LI>

</UL>

<TR>

</TR>

</TABLE></CENTER>

<CENTER> Eyepiece</CENTER>

<H3>

LOUP</H3>

<UL>

<LI>

Lens B lens is a cemented

two element achromat mounted at one end of outer tube.

Lens B can be used by itself as a 5x loup</LI>

</UL>

<TR>

()</TD>

</TR>

</TABLE></CENTER>

<CENTER> part B: 5 x

loup</CENTER>

<UL>

<LI>

Lens C is another cemented two element lens of

10x power . Lens C can be used as a 10x loupe</LI>

by itself.</UL>

<TR>

</TR>

</TABLE></CENTER>

Part C: 10 x loup

<UL>

<LI>

Lens B and lens C combines into a

15 x loup</LI>

</UL>

<TR>

</TD>

</TR>

</TABLE></CENTER>

Great for examine Minox 8x11 negative

<H3>

TELESCOPE</H3>

<UL>

<LI>

Eyepiece A and lens B together makes a

3x telescope</LI>

</UL>

<TR>

<TD BGCOLOR="#000000">)(

()</TD>

</TR>

</TABLE></CENTER>

<CENTER> A + B = telescope</CENTER>

This telescope is only 3 cm long can be held with two

fingers-- the smallest telescope ever made.

One interesting property of this tiny telescope is its focuses as close

as 8". Not many regular telescope

can focus that close.

The following are some use for this vest pocket telescope

<UL>

<LI>

Examine object under lathe at an

arm's length safe distance</LI>

<LI>

Look at menu or newspaper at next table.</LI>

<LI>

Check title on top shelf in book store or library</LI>

<LI>

Look at the details of camera in display

case behind the counter</LI>

</UL>

</UL>

</UL>

<H3>

MICROSCOPE (25-30 X)</H3>

<UL>

<LI>

All three lenses together make a

25x to 30 x microscope</LI>

</UL>

<TR>

</TR>

</TABLE></CENTER>

<CENTER>A + B+ C= microscope</CENTER>

<UL>

<LI>

Ideal for examination of Minox 8x11

negative</LI>

<LI>

Examine fine details of stamp</LI>

<LI>

Check out bogus money--- with

this very sharp microscope, finest details in paper money will be</LI>

</UL>

revealed in great sharpness, it is easy to distinguish bogus money from

real

<UL>

<LI>

Examine diamond and gem</LI>

<LI>

Examine micro-mount crystals</LI>

<LI>

Examine fine detail of yarn, silk

and fabrics.

<li> Examine the dpi of printed picture in book/magazine</LI>

<LI>

Examie small insect</LI>

</UL>

Emoskop microscope has a great advantage over ordinary

high power loup----- greater working

distance. For example with a 22 x Peak

loup, the working distance from the loupe to the a stamp is

less

than 10 mm; because the lens is too close to the object, it

blocks light, and the object appears dim.

This short working distance may be not relevant for viweing

negatives or transparancies, but is important in examination

of opaque objects, such as stamp, paper money,

tiny mineral crystals from micromount etc.

Emoskop in microscope mode has a working distance of 24mm, and

the object appears brighter then any loupe

SPECIFICATION

<UL>

<LI>

Metal construction</LI>

<LI>

Five coated glass elements in three group</LI>

<LI>

Flat field achromatic</LI>

<LI>

Length</LI>

</UL>

<UL>

<LI>

Full length 42mm</LI>

<LI>

Microscope : working distance : 24mm (from front to object)</LI>

<UL>

<LI>

25x : 42mm</LI>

<LI>

30x : 57mm</LI>

</UL>

<LI>

Telescope 2.5x/teleloupe 3x </LI>

<UL>

<LI>

Infinity : 34mm</LI>

<LI>

30cm : 50mm</LI>

</UL>

<LI>

Loup</LI>

<UL>

<LI>

5x 25 mm</LI>

<LI>

10 x 9 mm</LI>

<LI>

15 x 32 mm</LI>

</UL>

<UL>

<LI>

Diameter 21 mm</LI>

<LI>

Weight 28 g</LI>

<LI>

Genuine black leather case to hold assembled Emoskop

(microscope) and the stand.</LI>

<LI>

Anodize aluminium body</LI>

</UL>

Variations

of EMOSKOP

Wetzlar EMO EMOSCOP SM

<TR>

</TD>

</TR>

</TABLE></CENTER>

<TR>

<TD>

<CENTER>Wetzlar</CENTER>

<CENTER>Germany</CENTER>

</TD>

</TR>

</TABLE></CENTER>

<UL>

<LI>

No milled band on top</LI>

<LI>

No chrome ring at bottom</LI>

<LI>

Macrolon body</LI>

<LI>

Larger leather case to fit both emoskop and stand</LI>

</UL>

<HR SIZE=9 NOSHADE WIDTH="84%"> Saunders

EmoScop

In the

70s, Sauders Co in Rochester imported

Emoskop and marketed it under the name EmoScop

<TR>

</TR>

</TABLE></CENTER>

<TR>

<TD> Emo

Scop

SM

<CENTER>SAUNDERS </CENTER>

<CENTER>Rochester</CENTER>

</TD>

</TR>

</TABLE></CENTER>

<CENTER> Saunders EmoScop</CENTER>

<UL>

<UL>Difference between emo

Emoscop and Saunders EmoScop:

<UL>

<LI>

There is no "Wetzlar EMO Germany" on Saunders EmoScop,

although it was made by EMO</LI>

</UL>

Wetzlar.

<UL>

<LI>

Sauders EmoScop stand is a full cylinder, EMOSCOP

stand is a cylinder with a quarter cut off for</LI>

</UL>

more light

<UL>

<LI>

Saunder box has three slots: one for assembled

Emoscop, one for acrylic stand and one for leather case</LI>

<LI>

emo emoscop has five slots: three places for the

three lenses separately, one slot for stand one for leather

case</LI>

</UL>

<HR SIZE=9 NOSHADE WIDTH="82%">Haverhills Episcope

The Emoskop was originally made in Germany by EMO-Optik. The

production of Emoskop was

discontinued a few years ago. According to a dealer in

New Zealand, he saw the Emoskop at

Photokina at late 198x, and imported

it to New Zealand for distribution.

New Emoskops

are still being sold ( by stores specialized in loup, stamp, or fabric

and yarn )

Haverhills in USA

has a Emoskop clone made in China,

and sold under Haverhills' own trade mark as <a href="http://www.haverhillsproducts.com/episcope.htm">Haverhills Episcope

TM</a>

The workmanship of

Episcope is excellent: anodized metal tubes are

well made, with nice decorative

milled ring on eyepiece and inlaid chrome ring on the 10x

loup. Actually the Episcope looks very close to

the original metal Seibert emoskop, with milled band

and chrome ring accent.

Optically the Havershill

Episcope performs quite well, the images of loups, telescope

and microscope are

crisp and bright, without color fringing. I compare the

Episcope vs the original EMO-Seibert emoskop in

telescope/loup/and microscope mode, and do not see any difference

in performance.

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MTC Photography · April 21, 2000

The EMO Wetzlar

EmoScop is made of macrolon, it has one advantage over the metal

Seibert-Emoskop: in telescope mode, the inner tube of EmoScop has

a internal groove such that the eyepiece tube cannot be pull out

without squeezing the tube, unlike the Emoskop the inner tube can

be pull apart easily. Hence the EmoScop telescope can be focused

as close as 6". The original Seibert Emoskop close focus to about

8".

In Havershill website, it says that Episcope/telscope can focus

close to 6", that is incorrect.

Episcope/telescope's closest range is about 12"

MTC Photography · April 21, 2000

The original Wetzlar-SEIBERT-

Emoskop may not have a stand, as the Emoskop instruction sheet did

not

mention such as stand.

MTC Photography · April 23, 2000

Extending the principle of Emoskop, I tried the following

combination<ol>

<li>Part A+ part B of Emoskop + 22x Peak loup = 66x microscope

<li>Minox MD6X16 monocular + 50mm/f1.4 Carl Zeiss T* lens = 30x

microscope.

MTC Photography · April 28, 2000

There is very little information about Arthur Seibert in literature

and on the web. The best source so far is

Morris Moses and John Wade: Spycamera the Minox Story chapter 4: The

Early Postwar Period. There is a portrait of Arthur Seibert, a diagram

of Pentar lens of Minox II, the COMPLAN lens, and information about

EMO-Optik.

MTC Photography · April 29, 2000

The magnification of a microscope is the magnification of objective

multiplied by the magnification of the eyepiece.

In case of Emoscop in microscope mode, the objective has 10x

magnification, and the 'eyepiece' is a telescope of 2.5 to 3 x power

Hence the magnification of the Emoscop in microscope mode is

from 25 to 30, being the product of 2.5x10 and 3 x 10

MTC Photography · April 29, 2000

The magnification of two loupes put together is the sum of the

magnification of each loupe.

For example, in

Emoscop loup, the combination of 5x loupe and 10x loupe = 5+10=15x

loupe.

This is because the focal length of compound loupe is

1/F = 1/f1 + 1/f2

Since the power of loupe is 250/F(mm) therefor

250/F = 250/f1 + 250/f2

Or power of compound loupe = sum of power of the loupes

MTC Photography · May 2, 2000

<a

href="http://benmeadows.com/cgi-bin/SoftCart.exe/scstore/p-103160.html

?E+scstore">EmoSkop SM</A>

MTC Photography · May 2, 2000

<a href="http://www.briefmarken.ch/zubehoer.htm">Emoscop for stamp

collector </a>

MTC Photography · May 2, 2000

IMO, the three slot EmoScop box is better than the five slot box;

because, after use, you don't have to disassamble the EmoSkop into

three separate pieces and store them separately, you can put the whole

Emosop in one slot.

Further, for long storage or display, the disassembled Emoscop is

more likely to get dust into its interior

pete__ · September 27, 2000

Haverhill's apparently imported an EMO from Germany before they

started with the Asian clones; I have one that has the chrome milling

and bands of the original EMO, and in the middle the words

A. SEIBERT

Wetzlar/Germany

haverhill's

engraved in the barrel. It didn't come with the plastic stand, but did

come with a fitted leather case. I got it new some 35 years ago. Still

have it, still use it!

MTC Photography · December 17, 2000

A Hong Kong company Emoscop.com now makes Emoscope in

an ISO 9002 certified optical instrument company in china

<a href="http://www.emoscop.com">Emoscop.com</a>

bruce_f.__ · March 12, 2001

Haverhill's Episcope was, at least for awhile, made in Japan. The

website mentions only Chinese manufacture. My Episcope, bought from

Haverhill's 10-15 years ago, bears a logo of the Japanese

company, "NG." I'll be happy to provide photos showing that logo &

the Episcope itself if you'll Email me

MTC Photography · March 15, 2001

Bruce

You can post to

<a href="http://groups.yahoo.com/group/EMO-users">EMO-USERS discussion

group </a> by sending email with attachment of jpg file

martin

MTC Photography · July 3, 2002

<a href="http://www.micromineral.org/micromontage.html">Emoscope in mieralogy</a>

MTC Photography · July 29, 2002

Picture of EMO Seibert Wetzlar Emoskop and Emoscope SM, taken with

Minox B on Minox copy stand<div></div>

MTC Photography · October 5, 2002

Dave Walker's digital macro photography with Emoscop

http://www.microscopy-uk.org.uk/mag/artjun01/dwemo.html</a>

MTC Photography · October 5, 2002

<h3>Bioquip.com </H3>

<a href="http://www.bioquip.com/product_special.htm">Emoscop SM at

special price </a>

mauro_. · November 11, 2003

I own a macro bellow for voigtlander bessamatic signed Artur Seibert Wetzlar; it is a fine piece of mechanics and optics. Could anyone giving me further informations on it?

Thanks in advance

MTC Photography · November 12, 2003

Mauro, can you upload a picture of this macro bellow ?

MTC Photography · February 20, 2004

EMO Optik Wetzlar also built Lordon 1:1,9/50mm lens for Lordomat SE

35mm camera of Leidolf Wetzlar.

<a href="http://www.designundphoto.de/seite%20ca0160%20leidolf%20lordomat%20.htm">Lordomat 35mm camera </a>

bruce_bond1 · January 6, 2012

You wrote that Haverhill's Episcope is made in China. I own an Episcope I bought at Haverhill's some 20+ years ago & it is marked "Japan."

MTC Photography · January 6, 2012

Bruce, Havershill episcope was once upon a time made in Japan, later made in China.

Emoscop was made in Germany, now also made in China

MTC Photography · April 6, 2012

Replace missing images due to site change

EMO emoskop in box

One telescope, one loupe

Loup screw on to telescop = microscope

Emoscop on stand as microscope

MTC Photography · April 6, 2012

Original SEIBERT EMOSCKOP

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Wizard of Wetzlar- Arthur Seibert

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