Zeiss Ikon CONTAREX User manual

zErssBr0G0N      ZEISSDISTAGON        Z E I S SP L A N A R
t 14.5-21mm        f l4-35 mm       Il2-50mm

                                              Comparisonof focal lengths
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I  Ropidwind lever                                16 Settingmork
 2  Releoseknob with threod                         17  Depth-of-fieldscole
 3 Fromecounlingdisc                              18  Externolexposuremeter window
 4  Diophrogmring                                 19 Film-fypeindicotor
 5  Aperturewindow                                20  Rewinddisc
 6 Mork for operture                                          2l  Foldedcronk
'                                                                                                                                                                                                                           ' 7  Settingring on lens mount                        22  Shutter-speedmork        ^r":
 8  Floshcohtoct                                  23  Shutter-speedring
  I  Buiton-forexchongeof lenses                      24  Eyeletsfor corrying sirops
l0  Reddot for exchonginglenses                     25  Viewfindereyepiece
11 Lishrwindow                                   26  Lockingbor for comero bock
12 Film-speedmork                                 27  Accessoryshoe
l3  Perforoteddisc (light boffle) of the exposuremeter     28  Focol plone
14 Leverfor deloyed oction releose(selftimer)           29  Tripod bush
l5  Boyonetmountfor filters or lens hood               30  Rewindingmork



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The         Gontarc>x
by ZEfSS IKON AG.  Stuttgort is o single-lens minioture reflex comero for the24x36mm  negotive formot.
The comero hos o porollox-free viewfinder, o photo-eleciric exposure meter coupled  to  lhe  focol-ptone
shutter, o ropid film wind lever ond inlerchongeoble renses.
The CONTAREX is o mosi suitoble insirument for the professionol phologropher, the scienfisi, the ,press
photogropher, the technicion ond olso for the discriminoting omoteur, oll  of whom  will be oble io 6btoin
excellent photogrophs with   it even under the most difficult  conditions. The viewfinder  will  olwoys snow
the upright ond loterolly correci-imoge which will be depicted on the film no motter which lens is used.
This opplies olso for close-ups, close-up mognificotions, photo-microgrophic ond other speciolised worr.
The reflected imoge seen ihrough the toking lens will olwoys be completely free from porollox.
Mony procticol occessories widen ihe scope of ihe comero  in  oll  fields  of  photogrophy;  in  short, the
CONTAREX is on extremely versotile comero which meets oll requirements, since even lhe most diificult
photogrophic problems con be solved with  its oid, with omozing speed ond simplicity.
These insiructions for using ihe CONTAREX ore intended io moke  ihe CONTAREX owner  fomilior  with
his comero, ond show how  this precision comero con be employed to yield good pictureswithlhe greolesl
eose of operotion. Further porticulors will be found in ihe CONTAREX literoture ond   if you ore  still  in
doubt, do not hesitoie to osk your usuol photo-deoler for odvice.

Thespecialfeaturesof the C0 NTAREX

All the odvontoges   both           ISSIKONcomeros,the CONTAX ond the CONTAFLEXore com-
bined in the CONTA                                  r feolures of the CONTAREXore these:
Theall-metal                         e highestpossibleprecisionond rigidity.
Thebuilt-in                             with its wide meosuring ronge ond colour-corrected photo-cell.
The                            phroQm ond the shutter speed settings ore coupled to the exposure
i n d i c o t o r i n                                    ith one component, ihe other one is determined outomoticolly' The
indicotor con
of the CONTAR
The parallax-free                   ith its bright,lorge, uniformly-illumi              ond two types
of rongefinder, o spliil              inder ond o micro roster ring, which ore                     focusing
device.
The interchangeableCARL ZEISS lenseswhich hove beenespeciollycompu        ONTAREX,ore in
ropid-chonge boyonet mounts. The ronge of interchongeoble lenses extends fro          .l35 super-wide-ongle
lens to those of extremely long focol lengths. The CONTAR             35 mnf to   mm hove pre-sef
spring-diophrogmswhich ore coupled to the exposure meter.
The shutter speeds from  I sec. to r/rooosec. ond ,,B" for  li                                o  ring ond ore
olso coupled to the exposure meter.



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The focal-plane shutter runs smooihly ond  is free from  vibrotion.   lt  is synchronised for both   f l o s h b u l b s
 ond electronic flosh ond outomoticolly selects the correct moment of  ignition   if  the  shuiter speed  is
 correctly set for ihe type of flosh in use. A deloyed oction device is built into ihe shutter.
 All settings - distonce, operture, depth of  field, shutier speed ond exposure indicotion con be reod  off from obove of o single glonce.
 standard35 mm miniaturefilm is usedwirh the GoNTAREX,in the form  ei                         tridges
or doylight-refillsin coNTAREX cossettes,which con orso be used wi                                     rjafills.
The twiii-cassettesystem mokes it possible to remcve the film wi                                  o n dcolour films con olso be exchongedwithout rewinding.
The detachablEbackhelps consideroblyin dustingond cleoning the
ond unloodingon eosy motter.
Onlya few access0riesore needed to simplify the mosteringof difficull                     3, such os close-
ups, close-upmognificotions,photomicrogrophy,copyingond tele-photo pict
The highestpossibleprecisionin the mechonicolcorstruction,the unsurpossed    ncy of ihe lenses ond
the obsolutereliobilityof the built-inexposuremeter moke ihe CoNTAREX       ronking comero  f or
the professionol photogropher, the scientist,the technicionond the discrimi          oteur.

Thecontrols

We odvise you to proctise operoting the vorious controls ond levers before looding the comera. Turn out
ihe inner leoves of the cover for furlher reference,ond generolly get fomilior with your comero.
Setting the distancg. The correct distonce should be set by  operoting  ihe  rongefinder  within  the  finder
imoge. In the centre of the finder imoge is o circulor oreo which is divided into two holves (definition
indicotor). When o perpendiculor line is sighted in the viewfinder ond the focusing ring (7) is operoted,
the two imoges in the rongefinder will move in opposile direciions ond the verticol line will oppeor brpken.
The distsnce is correctly set when the lwo poriiol imoges ore exocily oligned ond form one singfi un-
distoried imoge. When toking upright pictures o horizonfcl, line gfould be chosen.
The split-imog-erongefinder is surrounded by o micro-roster ring, which  is  similor  to  o  ground-gloss
screen ring. The outlines of o subiect will oppeor unshorp in  this ring, when out  of  focus. The micro-
roster ring should be used for focusing, therefore, in the some woy os o ground-gloss screen is used.
This meihod of focusing should be used when the subiect hos no distinct verticol lines, especiolly when
complex structures or potterns ore  lo  be photogrophed  or  the CONTAREX  is used  for  copying. The
CONTAREX lenses from 35 mm  to 250 mm focol length con be focused with either the split-imqge ronge-
finder or the micro-roster ring (Fig. l).
The oreo of the finder imoge outside the centrol ring  is olwoys bright ond shorp ond connot be used
for focusing.


Fig.t

After focusing, the octuol distonce ond the depth of
                  field con be reod off from the lens mount. On the
                setting mork (.|6)the focused distonce is indicoted. To
                lhe  left ond  to the  right of  the setting mork the
              flnumbers of the opertures ore engroved. The shorp
              zone, thot is to Soy, the depth of field, reoches from
               the distonce-figurewhich is opposite the set operture-
              volue on the left, to the distonce which is opposite
               the some flnvmber on the right. Exoct porticplors of
               the depth of field con be found in the depth-of-field
                lobles. As the plone of reference for the distqnces,
               the foccrl plone is morked by the circle (28) on top of
                ihe viewf inder eyepiece of the CONTAREX.


             The distonce con olso be set by using the depth of
                  field scole. Turn the lens so os to ensure the depth of
                  field required of ony given operture setting ond then
                set this operture by meons of  the operture setting
                ring (4). Further distonce setting is then unnecessory
                         ( F i g . 2 ) .

                   Fis. 2

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When looding  lhe comerq the speed of the film musl be set ogoinst rhe mork  (t2). prior  to  ioking  o
piciure, most phofogrophers will pre-selectthe shutter speed which tokes into qccount the speed of the
moving subjeci. For ihis purpose the shutter speed ring  (23) should be turned so  ihot the mork  (22) is
opposite the  shuiter speed required. This seis the shutter speed desired (Fig. 3). The figures on  the
shutter speed ring ore simplified ond denote froctions of o second (e. s. 60 = 1/to sec.). Witfr the hond-
held comero ond the stondord lens, pictures con be mode without comero shoke ot shutter speeds from
r/:o sec. lo 1ltooosec. Slower shuiter speeds ond time exposures should be employed only when the comero
is screwed to o tripod. With lenses of longer focol lengths the  shuiter speeds should be  considerobly
foster. Only full volues con be chosen.
       .u                                                                                              ^*"s
When sighting ihrough fhe viewfinder, you will see o bright strip to the right of the finder imoge, which
is provided with o centrol mork. The pointer of the exposure meter is reflecied into this strip. When  the
operture setiing ring (4) is turned the pointer con be ceniered on the mork (Fig.4). When the pointer is deod
on  ihe mork the correct operture for the shutter speed determined beforchond is pre-set. This setting
con be ony intermediote operture volue. The pre-set operture con be reod off from the operture scole (5).
When ihe shutter is releosed the diophrogm inside the lens springs outomoticqlly to the pre-set operture.

lf the pointer connot be centered on the mork by turning lhe operture setting ring  (4), the shuler speed
chosen is either too slow or too fost for the prevoiling lighiing conditions ond the speed of the film  in
use. A slower or foster shutter speed should ihen be selected.

                                                                         r3

The indicotion of  lhe exposure meter (18) con olso be reod  off  from  ihe  top cop  of  ihe CONTAREX.
 Here the pointer should be centered on the centre of the circle.
 lf on exposure is to be mode with o pre-defermined operture, e. g.  to  obtoin o  definite depth  of  field,
 the operture  in question should be set by meons of  ihe operture seiting ring  (4) so  thot the operture
figure in the operture scole is opposite the mork. Now sight through the viewfinder ond lurn the shutter
speed setting ring (23) so thot the pointer  in the viewfinder is centered on the mork. This sets the correci
shutter speed in relotion  lo  ihe pre-selected operture.  In  this cose, however, only one  shuiter speed
should be indicoted which should correspond to the mork (22) ond snop in distinctly. When  on,.inter-
mediotq-volue  is indicoted, turn fhe ring (23) until it snops in ond then turn the operture setiing ring (4)
until the pointer is exoctly opposile the mork.
The exposure coupling involves o  limit  in the shutter speeds which con be  set ouiomoticolly for  the
vorious  film- speeds. For instonce, wiih  12 ASA  film, the slowest speed  is   'l second, with 50 ASA
film  it  is 1/a sec., with 400 ASA film'/so s€c. etc. Rigid stops ensure ihot these limits determined by the
meosuring ronge of the exposure meter connot be exceeded,since ihis would result in incorrect exposures.
When  it is required to use ony combinotion of shutter speed ond operture independent of  fhe coupling
(e. g. for copying), the mork for the film speed (12) is set to the green dot ot the beginning-  of the film-
speed scole. Then oll setiings from "B" lo 1ltooosec. cqn be used without restriciion (Fig. 5).
When,serectinsin ,r,"poor;plie,r",i,illffi,"*1$:"i;,"in,,''X""#:;ff"3"1$"'ij'o?,".ffi1,'i"";;,"irui;T'j'iJjll:l

                                                                              1 5

the exposure meter should be removed. Turn the perforoted disc with  its two hondles to the  left ond
       pull  it out towords the front. Now  o yellow dot will be visible. The film speed should now be set to
      ihe yellow dot ond no longer to the block iriongle (Fig. 6).
     With ihe light boffle removed the exposure meter hos been converted io "incident light meosuring,,.This
      olso chonges the procedure of meosuremenl: now the incident light folling on the subiect must be meosur-
      ed, thot  is io soy, the exposure meter should be directed from the subiect towords the intended stond-
      point of the comero. With this method of meosuring the sensitivity of ihe meosurementis increosed by four
      lens stops (x16) ond the meqsuring ronge now olso embroces the slower shulfer speeds.
     This method (incideni light meosurement) con be employed olso when the lighting conditions orJ  aifti-
      cult to qssess(e. g. contre-iour shofs, high controsts,etc.) ond for subiects hoving o very bright or dork
     bockground.
         lf, for worki;g  under normol conditions, the light boffle  is reploced -  push on ond turn to the right -
      the film speed must once ogoin be set so thot the block triongle (12)points to the speed figure.I When setiing the operture occording to the indicotion of  the exposure meter, full f/numbers will  noi
     olwoys be obtqined but sometimes infermediote volues.Theseinfermediotevolueswill be retoined occurote-
       ly when lhe pre-set spring diophrogm snops in. This ensures obsoluiely correct exposure.
     Correct light meosurementshould be mode olwoys with the comero in o horizontol position even when
     the ociuol exposure is to be mode in the upright posrtion.

                                                                                                                                                     t 7lIL

The outomotic exposure control of the CONTAREX is designed  to  operote  with  the  following  lenses:
DISTAGON t/4,35 mm; PLANAR f/2,50 mm; SONNAR t/2,85 mm; ond SONNAR f/4, 135 mm. The indi-
cotion of the exposure meter opplies olso to the BIOGON  f/4.5, 21 mm ond the SONNAR  t/4, 250 mm.
The stop reod  off  from  ihe operture scole, however, should, in these coses, be set on the lens itself.
When using colour reversol film, the speed of which is usuolly given os o guide volue (to be exposed os
o X ASA film),  it  is odvisoble io moke o few test exposures in  order  to  estoblish the  reoction  of  the
colour film to fhe indicotions of the exposure meier.
When ioking subiects of low controst (overcost sky, dull  weoiher)  or  under poor  lighting  conditj'ons in
interiois on reversol film, the film speed should be set, not  io the block triongle mork (12) but  io  thoi
morked "x 2".
The expdsure(Fig.2,8)
When fhe pointer of the exposure meter is set to the mork inside the viewfinder or on top of the comero,
correcl exposure is ensured ond ihe shutter con be releosed. The right-hond index finger should depress
the releose knob gently. Do not ierk, but squeeze the knob, toking up the slock in the releose mechonism
slowly. This will couse the mirror io  flip upwords, the diophrogm to spring to the pre-set position ond
the shutter to run off  ot the pre-sel speed. Then the  mirror returns io  the finder  position whilst the
diophrogm remoins of the pre-set volue in order to remind you thot the next exposure con be mode only
when ihe ropid wind lever is operoted. Wiih  the operotion the  film  is odvonced by  one frome, the

                                                                              1 9

II


shutter is tensioned once ogoin ond the diophrogm opened to  its full operture. After exposure meosure-
ment ond disionce setting, the next exposure con be mode (Fig. 9).

Flashexposures
The focol-plone shutter of the CONTAREX con be coupled io  oll types of flosh lomp. Setting the shutter
speed (23) will oulomolicolly odiust the corresponding flosh contoct so thot the vorious flosh bulbs or
eleclronic flosh units will be fired of the oppropriote instonce, olwoys provided, however, thot the shutter
is sei to the correct speed. The shutter speeds ore morked by coloured figures. They ore i                ,.

              (1-1/zosec. ond "8") for firing fost-burning floshbulbs (closs M) or electronic floshes. I  Block                                                                                                                                            ttIIffg
                          for firing electronic f loshes.                         s2 Yellow   -(t/ro sec.)                                                                E
   Red         (tlrrt- 1/rooosec.) for firing slow-burning floshbulbs (closs FP), which ore speciolly mode for3
            use with focol-plone shutters.                                                                                                                                                                                                                                                                                         II)IThe operlures to be employed with the vorious types of  flosh unit ore  indicoted in the iobles provided       x t
with the flosh lomps. The oppropriote operture should be set by meons of  the operture disc occording
to the indicotion in the operture window.                                                            ,{d

                                                                       21



                                                                                                                                                                                                                            l ^ F

The deloyed oction device (self iimer) con olso be used for  flosh exposures with  oll shutier speeds from
1 - r/roooSec.

The flosh leod should be connected io ihe flosh contoct (8) beside the lens (Fig. 10). The flosh gun itself con
be slipped either inio the occessory shoe or screwed to ihe brocket which  is fitted  to the  tripod bush.

$elftimer
The deloyed oction device (selftimer) should be tensioned by depressing the lever (14). When  the {leose
knob (2) is depressed,the device slorts running ond will operoie the shutter outomoticolly. The lever (20)
should be operoted only ofter the shutter hos been tensioned. When the lever is depressed right down to
its finol position the deloy will be opproximotely 12 seconds. Between the finol ond the  initiol position
ore notches into which the lever will click for intermediote deloys. The selfiimer con be used with  oll
shutter speeds from  I  - r/rooosec.

Exposuresfroma tripod
The CONTAREXis provided wiih o tripod bush (29)ond con be screwedto o tripod or o copying unit. This
is necessorywhen time exposuresore to be mode.A tripod should olso be used when tong focus lenses

Fig.10,ll                                                                 23

ore employed. The shutter should be releosed by
meons of o coble releose which con be screwed into
t h e  t h r e o d o f   t h e  r e l e o s e k n o b  ( 2 ) . T h e t r i p o d b u s h
(29)of the CONTAREX is countersunk into the comerq
body, which ensures perfect rigidity (Fig. I I ).


Exchangingthe lens

To ensure ropid ond sofe exchonge of  lenses, the
CONTAREX -lensesore provided with o boyonet ond
the CONTAREX body with q corresponding boyonet
mount. To remove the lens from the CONTAREX, the
knob (9) beside the lens should be depressedond the
 l e n s  t u r n e d   i n  o n  o n t i - c l o c k w i s ed i r e c t i o n u n t i l   i t
stops. When this is done the red dot on the lens will
be opposite the red dot  (.l0) on the CONTAREX. In
this position the lens leoves the boyonet mount quto-
moticolly (Fig. 12).

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t .             .


 To inseri onother lens, ploce the lens on the boyonet mount so thol the red dot on the lens coincides
  with the red dol (10)on the CONTAREX.Turn the lens to the right until it snops in. This will couse the knob
  (9) to iump out. The  lens will  be coupled outomoticolly to  the exposure meter os well  os  to  the
  rongefinder. lt does not motter whether the lens ifself is set to "infinify" or ony intermediote distonce,
  or to which operture the diophrogm is set. When the lens is inserted the meosurement of the exposure
  meter is limited qutomoticolly to the speed of the lens in use.
 The CONTAREX lenses con be interchonged in full doylight withoui fogging the  film  but   ii  is obvious
  thot the opening in the comero should be protected from direct sunlight.
                                                                                                                                                                   Bbhn
                                                                                                                                                                                                                                           EE*,3lr                                A specialcase





  Fis. l2

,.-, .,:.'.......--.,,:-.;.-,                                                                      I

T h e B I O G O N   f / 4 . 5 , 2 1 m m , w h i c h e x t e n d s d e e p  i n t o
                             t h e b o d y o f   t h e C O N T A R E X , c o n b e   i n s e r t e d o n l y
           w h e n   t h e m i r r o r    i s    i n     i t s   r o i s e d p o s i t i o n . F o r
                             t h i s p u r p o s e  t h e  s h u t t e r m u s t b e  c o c k e d . W h e n
                             t h e C O N T A R E X i s   t e n s i o n e d o n d   t h e m i r r o r   i s   i n
                             t h e v i e w i n g p o s i t i o n , i t  c o n b e m o v e d u p w o r d s b y
              d e p r e s s i n gt h e s m o l l k e y - l u g b e n e o t h t h e m i r r o r . T h e n  @ t h e B I O G O N  f / 4 . 5 ,2 l m m c o n b e  i n s e r t e do c c o r d i n g
                                    i o  t h e " r e d d o t  i o  r e d d o t " r u l e . F o r s i g h t i n g t h e v i e w -
                             f i n d e r f o r 2 l m m  f o c o l  l e n g t h s h o u l d b e u s e d , w h i c h
          m u s t b e s l i p p e d i n t o t h e o c c e s s o r ys h o e ( 2 7 ) T. h e d e p t h
              o f  f i e l d o f  t h e B I O G O N  f 1 4 . 5 , 2 1m m   i s s o g r e o t t h o t
                                    i t   i s s u f f i c i e n tt o g u e s s o t  t h e d i s t o n c e .T h e d e p t h o f
                             f i e l d o t  f / 5 . 6 ,w h e n s e t  l o o p p r o x . 6  f t . , r o n g e s f r o m
                    ;1     o p p r o x . 3 4  i n . t o  i n f i n i t y . l n s e r t i n gt h e B I O G O N d o e s              n o t  i n v o l ' z et h e  l o s s o f o   f r o m e . W h e n  t h e B I O G O N
                                    i s   r e m o v e d  t h e m i r r o r w i l l   r e t u r n  i o    i h e  v i e w i n g
              p o s i t i o n o u t o m q t i c o l l y w h e n  t h e s h u t i e r i s  t e n s i o n e d
                        ( F i g .l 3 ) .




             F i s .1 3

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0peningthe camera(Fig.14,1s,16,17)                                                  Fig.15,16,17
The CONTAREX should be held in the left ho nd, with  the lens pointing downwords. The locking keys
(26) ot the bose of the co mero should be  f olded outwords with the right hond ond turned to the right
ond  the  left respectivelv. This unlocks the bo ck. With  your  left thumb push the bock of  the comero
downwords ond  lift  it off with the right hond.
Loading (Fig.18,I 9,20)
To lood the comero, ploce o stondord commerciol cortridgefor 20 or 36 exposures in the rig ht-hond  f i lm
chomber so thot the trunnion for rewinding engoges the lower openingof the cortridge. Pull the beginning

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Fis.18,I9, 20
o f   i h e  f i l m o c r o s s t h e  f i l m g o t e o n d   i n s e r t i t   i n t o t h e s l o t o f  t h e  t o k e - u p s p o o l . H o o k  t h e t h i r d o r  f o u r t h
p e r f o r o t i o n h o l e  i n  t h e  l u g  i n  t h e s l o t o n d  t u r n t h e t o k e - u p s p o o l s o t h q t t l r e t e e t h o f  t h e t r o n s o o r ts o r o c k e t
e n g o g e t h e p e r f o r o t i o n s o f  t h e  f i l m o n b o t h s i d e s .
W h i l s t h o l d i n g t h e f i l m  i n c o n t o c t w i t h  t h e s p r o c k e tw i t h   t h e  t h u m b o f   t h e   l e f t h o n d s o   t h o f  f h e  t e e t h
r e m o i n e n g o g e d w i t h  t h e p e r f o r o t i o n s , t h e c o m e r o b o c k s h o u l d b e   r e p l o c e d b y    l o w e r i n g   i t    i n t o   t h e
grooves of the comero from obove. Then slide  it bock on to the comero body. Turn the locking keys on
t h e b o s e  i n  t h e o p p o s i t e d i r e c t i o n o n d  f o l d  t h e m u p . T h e k e y s c o n b e   f o l d e d o n l y w h e n  t h e b o c k   i s
p r o p e r l y  i n p o s i t i o n .

                                                                          29

After looding, the frome counter (3) should be set. When your cor-
       tridge contoins film for 36 exposures set the white mork to the red
Q A   mork to the  left of 36; when you use o 2O-exposurecortridge the
l'l'    white mork should be set to the red mork to the left of 20. Now the
       ropid wind lever (l ) is swung oround with your right thumb until  it
       butts hord ogoinst the stop, ond then releqse the shutter. Do  this
       twice so qs to wind the fogged leoder film on to the toke-up spool.
       After releosing the shutter twice, unfogged film will be behind the
        film gote ond the frome counter mork will point towords 36 or 20,-The
      frome counter counts bockwords, thot  is to  Soy, it indicotes the
AA   number of unexposed fromes remoining.



            lf the film is wound on properly, the rewind disc (20) should rotote
        in the opposite direction to the engroved orrow. When using bulk
        film (see "Cossettes") or 20-exposure cortridg€s, the turns of  the
        film moy portiolly unwind; in this cose the rewind disc (20) will not
       rotote when the first fromes ore odvonced. In this cose the rewind
       disc (20)should be turned in the direction of the orrow until o distinct



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Fis. 2I
        resistonceis felt. (This is olso o  relioble indicotion
          of whether the comero is looded of oll or not.)

         Af ter lood ing, the speed of the  f i lm in use should be
         set on the speed scole underneoth the shutter speed
         setting ring. For this purpose the upper ring should
       be lifted up ond turned so thot its blqck mork (12]tis
        opposite the film speed required. The ring shoyld be
        ollowed  to spring bock. When  x2 or x4 filters ore
        used, the  oppropriote   f ilter  foctor  should  be  set
        opposite the f ilm speed.


       The film-type indicotor (.|9) con olso be set to the
        type of   f ilm used in the CONTAREX, by setting the
        oppropriote symbol (block-ond-white,doylight colour,
          ortificiol light colour film) to the speed figure of the
         film. The film type indicotor hos no influence on the
        functioning of the CONTAREX, but  it moy prove q
        useful reminder for you (Fig. 2l ).

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