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Exakta EXA 1a User manual

User manual for Exakta EXA 1a. 43 pages. Read the original PDF, download or print a copy without registration.

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Exakta
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Exakta EXA 1a
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User manual
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43
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3.8 MB
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Film cameras
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Page 7 · Read text
11 Rewind declutchingbutton            26 Dog shoft of rewind knob
12 FinderHood(finderhoodviewfinderunit) 27 Chomber for toke-up spool or cossette
13  Front ponel of FinderHood            28 Toke-up spool
14  Shutter-speedsetting ring             29  Film tronsport sprocket
15 Rewindknob                       30  Film gote
16  Film-typereminderring               31  Film guide roils
17  Shutterreleoseknob                 32  Detochoble comero bock (with inter-
18  lens boyonetcotch                       clrongeoblefilm pressureplote)
19  Sofety cotch for shutter releoseknob    33  Rototing knurled ring for locking the
20  Hinged focusingmognifier              comero bock
21  Grip for roising focusingmognifier     34  Tripod bush
22 Key for opening Finder Hood          35  Pento Prism
23  Cossettechomber for unexposedfilm    36  Eyepiececup for Pento Prism
24  Film guide plote                    37  Friction coupling of shutter-tensioning
25  ldler roller                                  lever

                                                                                                                                                                                                                                                                                                                                                                    \'rl
                                                                                                                                                                                                  I
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The EXA I o 24 mm x 36 mm comero  you con be certoin of olwoys toking success-
                                                     ful photogrophsond ovoiding domoge to
                                           the mechonismof the comero. lt is prefer-
is now your property,ond we congrotufote  oble to fold out the inside poges of the
you on your choice. This comero will give   front cover of this monuol, so thot you con
you o greot deol of pleosure,for  it is eosy  keep the key to the voriouscontrols in front
to opercte, quickly set for oction ond  is   of your eyes whilst reoding the instructions.
speciollydesigned for keepingolwoysreody
for immediote use.                        Before you lood o  film into your EXA I o,
                                                       first moke yourselfos fomilior os possible
You will olmost certoinly olreody be owore   with the hondling of the empty comero.
of the principol odvontogesof the EXA I q.   Proctice operoting the shutter, removing
It is,os you know,o single-1ensreflexcomero.  ond replocing the bock, ond the use of the
Insidethe body there is o smollmirrorwhich  Finder Hood or Pento Prism for locoting
reflectsthe imoge formed by the lens onto   the subjectond focusingthe imoge. Hondle
the ground-glossscreen. Only in this woy   the comero just os though it contoined o
is it possibleto obtoin o viewfinderimoge   film.  Finolly, moke yourself fomilior with
whichis olwoys identicolto the finol photo-  the film-looding procedure; here it is od-
groph; you hove complete freedom from   visoble to proctice with on old or olreody
porollox ond con composeond focus your  exposedond developedfilm,
picture on the ground-gloss screen with
perfect confidence.                    And now we wish you every success with
                                        your new EXA lo.   lf you hove ony queries
Before octuolly toking ony photogrophswith   concerningyour comero, we ore olwoys ot
your new comero, reod  this  instruction  your disposolfor odviceond informotion.
monuol corefully. Once you hove proctised
the correct methodof operotiono few times,

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Page 10 · Read text
Removing qnd replocing
      the comerq bock

      T u r n t h e m i l l e d r i n g ( 3 3 ) i n  t h e b o s e o f  t h e
       c o m e r o u n t i l t h e r e d d o t s o r e  i n   l i n e . G r o s p
       the comero with both lronds, with the bock
      (321 focing upwords ond the Finder Hood
           ( 1 2 ) o r t h e P e n t o P r i s m ( 3 5 ) p o i n t i n g t o w o r d s
      your body.  Slide the bock (SZ1 up from
       b e n e o t h t h e c h r o m e -p l o t e d t o p c o p p i n g b y
       p r e s s i n g g e n t l y o n     i t w i t h  b o t h   t h u m b s ,
        until the red dot obove the film gote (SO1
      b e c o m e s r i s i b l e ( F i g . 1) . T h e n l i f t t h ; c o m e r o
      bock (32) out of  its grooves. Wlren replocing
      the comero bock (32), check thot  the  r.ed
      d o t s o n   t h e m i l l e d  r i n g  ( 3 S 1 o r e o p p o s i t e
      o n e o n o t h e r ;  t h e n  f i t  t h e b o c k f r o m o b o v e
                i n t o   i t s g u i d i n g g r o o v e s o n e i t h e r s i d e o f
        tlre comero body, so tlrot the upper edge
      o f  t l r e b o c k  i s  i n   l i n e w i t h  t h e  r e d d o t  ( j u s t
      o s w h e n  r e m o v i n g t h e b o c k ) . T h e n p u s h t h e
      b o c k r i g h t h o m e o n d   t u r n  t l r e m i l l e d  r i n g
           ( 3 3 ) u n t i l  t l r e  r e d d o t s o r e o f  g O '  t o o n e
      o n o t h e r .

                                                             Fis. 1

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-r,
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Page 11 · Read text
(17) or  indirectly by depressing theOpening qnd closing                  knob
the Finder Hood                         releqse rocker (3) or releose l<nobon the lens.
                                    When  the sh utter- releo se sof ety cotch (1 9)
The Finder Hood (12) is opened by depressing    is set verticolly (with the red dot visible),the
the key (22), ond closed by pushing bock   shutter connot be releosed; this prevents it
ogoinst the front ponel (13) until  it locks.  from being releosed occidentolly whilst the
The focusing mognifier (20) is swung into its   comero  is pocked owoy  or being  corried.
working or rest position by meons of grip (21).

Further detoils on the use of the Finder Hood     Fis. 2
w i l l b e  f o u n d o n p o g e 13 . T h e r e fl e x  i m o g e
 i n  t h e F i n d e r H o o d w i l l o n l y b e v i s i b l ew h e n
 t h e s h u t t e r i s  t e n s i o n e d ; f o r  t e n s i o n i n g t h e
shutter, see the next porogroph.



Shutter tensioning ond film odvonce

o r e c o u p l e d  ( e l i m i n o t i n g d o u b l e e x p o s u r e s
 o n d b l o n k f r o m e s ) .W h e n t h e s h u t t e r - r e l e o s e
sofety cotch (19) is turned to the right (Fig.2),
the shutter releose con be operoted either
 by pressing d irectly on the sh utter releose

 4
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T h e s h u t t e r i s  t e n s i o n e d o n d   t h e  f i l m o d -    b e v o r e  r e l e o s i n g  t h e  s h u t t e r ;  t h e  s h u t t e r
v o n c e d b y m e o n s o f  t h e s h u t t e r - t e n s i o n i n g  c o n n o t b e  r e l e o s e d u n t i l t h e  f i l m h o s b e e n
l e v e r  ( 9 ) . A f t e r  e v e r y e x p o s u r e t h i s   l e v e r  w o u n d o n b y o w l r o l e f r o m e o n d  t h e s h u t t e r
s l r o u l d b e s w u n g  r i g h t u p  t o   i t s s t o p  i n o       f u l l y t e n s i o n e d . N e v e r e m p l o y f o r c e  i n o p e -
s i n g l e m o v e r n e n t ; t h e  l e v e r w i l l s p r i n g b o c k     r o t i n g t h e r o p i d - w i n d  l e v e r .

o u t o m o t i c o l l yt o   i t s i n i t i o l p o s i t i o n .l t  i s  i m -  W h e n y o u h o v e f i n i s h e d t o k i n g p h o t o g r o p h s ,
p o s s i b l e t o o p e r o t e t h e r o p i d - w i n d l e v e r ( 9 )   set the shutter-releose sofety cotch (19) to
                                                                                            t h e v e r t i c o l p o s i t i o n ,w i t h  t h e r e d d o t v i s i b l e .

Fis. 4                                 Operoting the shutter

                                          Instontoneous exposures: turn the shutter-
                                                   s p e e d s e t t i n g r i n g  ( 1 4 ) s o  t h o t  t h e d e s i r e d
                                       speed setting  is exoctly opposite tlre en-
                                              g r o v e d t r i o n g l e ( F i g , 4 ) . T l r e r i n g c o n n o t b e
                                            turned post  tlre  ,lns sec. ond B settings.
                                          T h e n u m b e r s r e p r e s e n t f r o c t i o n so f s e c o n J r ,
                                              e . 9 . 6 0  -  1 / 6 ss e c . I n t e r m e d i o t es p e e d sc o n -
                                              n o t b e s e l e c t e d .A l l f o u r i n s t o n t o n e o u ss p e e d -
                                                   s e t t i n g s c o n s o f e l y b e u s e d t o r " h o n d - h e l d , '
                                              e x p o s u r e s i, . e . w i t h o u t o  t r i p o d . L o n g e r t i m e
                                          exposu.resusing the B setting should only
                                              b e m o d e  f r o m o  t r i p o d o r w i t h  t h e c o m e r o
                                                                                            f i r m l y s u p p o r t e d . T h e t r i p o d b u s h ( 3 4 ) i s  i n
                                                         tlre bose of the co mero.

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Time exposures: set the shutter-speed setting    cribed obove  together  with on  odditionol
 ring (14) to B, The shutter will open when   locking knob for the releose rocker. Further
the  releose knob  (17) or the  releose me-   d e t o i l s w i l l b e  f o u n d  i n  t h e s e c t i o n sd e o l i n g
chonism of the lens is depressed, ond  will   with these lenses, poges 8  . . .12.
remoin open for os long os this pressure is
mointoined.   lt is olso possible to improvise  The B ond T settings ore  porticulorly im-                                               portont for night ond interior photogrophy.o "T" setting for very long time exposures:
set the shutter-speed setting ring (14) to B,  When tol<ing time exposures (ond porticu-
open the shutter by depressing the shutter    lorly with the B setting)  it  is odvisoble to
releose knob (17) or the releose control on   use o coble releose with o  long plunger;
                                                        this con be screwed either"into the shutterthe lens, ond then set the shutter-releose
sofety cotch  (19)  to  the  verticol  position'   releose knob (17) or  into the releose me-
The shuter will then remoin open without   chonism of the lens.
your touching the comerq  until the sofety   For oll time exposures the comero should
cotch (19) is once ogoin turned to the right.   be ploced on o tripod or some other firm
This method provides ideol protection ogoinst                                            support (toble, woll, etc.).
comero shoke, Lenses with  fully outomotic
 d i o p h r o g m s ( e . g . T 2 . 8 1 5 0 m m  f r o m J e n o )   The shutter speed con be selected either
s h o u l d b e s e t f o r n o r m o l ( m o n u o l ) s t o p p i n g -   before or ofter tensioning the shutter.
down, orotherwisethe diophrogm will re-open
 premoturely. When  using  the  Domiplon   Deloyed  oction  releoses, obtoinoble  from
2.8150mm lens for long time exposureseither   photogrophic deolers,con either be ottoched
 use the B-setting ond  if necessory o coble    to the coble releose or screwed directly into
 releose with  o  long  plunger ond  locking   the releose knob  (17) or  into  the  releose
 device, or else the T-setting method des-   mechonism of the lens.
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Page 14 · Read text
Operoting the lens
T h e  l e n s ( 1 )  i s  i n t e r c h o n g e o b t e : p r e s s t h e
boyonet cotch (18) inwoids, turn the lens
 t o   t h e   l e f t  ( F i g . 5 ) u n t i l  t h e  t w o  r e d d o t s
 ( Z o n d 7 ) o r e o d j o c e n t , o n d   t h e n   l i f t o u t
t h e  l e n s t o w o r d s t h e  f r o n t . T o  i n s e r t o   l e n s ,
proceed in the reverse seq uence ; line u p
t h e  r e d d o t s o n d  t u r n  t h e  l e n s t o  t h e  r i g h t
u n t i l  i t  l o c l < si n t o p o s i t i o n .
A w i d e  r o n g e o f s p e c i o f- p u r p o s e l e n s e sc o n
b e  e m p l o y e d  ( w i t h c e r t o i n  r e s t r i c t i o n s o n
l o n g - f o c u s  l e n s e s ;  f o r   f u r t l r e r d e t o i l s s e e
p o g e 3 5 ) .


                                                                     Fie. 5


                               m o x i m u m d e i ' i n i t i o n ,t h e n  t l r e e x o c t s u b j e c t
                                              d i s t on c e   i n  f e e t o r m e t r e s w i l l b e o p p o s i t e
                                                         tlre red setting morl<. This distonce i, meo-
                                          sured from tlre comero bock to tlre subject.
                                                                                 lf tlre comero is fitted with o Fresnel Lens
                                                                                            f o c u l i n g   s c r e e n ,   t l r e  m i c r o p r i s m    f i e l d
                                                   c o r  b e e m p l o y e d t o g i v e o d o u b i e o s s u r o n c e

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of focusing occurocy. Further detoils will be    of the setting mork lies opposite or even
found on poge 18,                     beyond the infinity symbol ( -   ), then the
                                             depth-of-field zone extendsto infinity.
Setting the diophrogm opening by meons
                                      Three exomplesrof the operture setting ring (4): the numeri-
colf y-smoller operture volues, 2.8, 4, provide  Distoncesetting oo (infinity),operturesetting
relotively lorge  lens openings, permitting     tlll:   depth of field extendsfrom opprox.
short exposure times  but  giving  shollow   26 feel (5 m) to infinity, see Fig.6.
depth of field. The numericolly-lorger oper-
ture volues, e.€t. 16, 22, give relotively smoll   Distonce setting 26 feet  (5 m)' operture
lens openings  requiring  longer exposure   setting tle:  depth of field from opprox.
times but providing o lorge depth of field.   10 feJt (3 m) to beyond 40 feet (12 m), see
                                             Fis.7.
"Depth of field" meons the obility to produce   Distonce setting 6112feet (2 m), operture
o shorp imoge of objects ot vorying diston-   setting flS.6: depth of field from opprox.
ces from the comero. The precise extent of   5 fee[ (1.6m) to 8 feet (2.5m), see Fig.B'
this shorp zone is indicoted by the depth-  When focusingby meonsof the refleximoge,
of-field  scole  (6) on  the EXA lenses:  on   olwoys set th-e lens to  its moximum dio'
either side of the red distonce-setting mork,  phrogm opening (i. e. to the numericolly-
locote the operture volue you wish to use for   imollest operturevolue) to obtoin the most
your picture ond note the distonce in feet   brilliont imoge ond then stop down just
or metres which is opposite the two relevont   before the eiposure. There is no need to
f/numbers on the scole. ln this woy you con   toke thecomeroowoyfromthetokingposition
 reod  off the distonces ot which the depth   provided thot the lens hos either o click-
 of field (or "shorp zone") begins ond ends.   stop diophrogm, pre-set diophrogm or o
 lf the relevont operture figure on one side      f ully-outomoticspringor pressured io phrog m.
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operture for focusing, ond then just before
                                           pressing the  shutter  releose     without
                                             lowering the co mero     tu rn the o pertu re
                                                setting ring until  it comes to o stop of the
                                            pre-selectedf/No.

                                              Fully-outomqtic pressure diqphrogm
                                          on Domiplon 2.8/50 mm lens (see Fig. 8)
                                          T h e  f u l l y - o u t o m o t i c p r e s s u r e d i o p h r o g m   i s
                                         olwoys wide open for focusing ond observing
                                                                                            t h e  r e f l e x i m o g e . T h e s m o l l e r o p e r t u r e d e s i -
                                             red for toking the  picture is pre-selected by
                                                                                            t u r n i n g  t h e o p e r t u r e s e t t i n g r i n g  r o u n d  t h e
                                             very   f ront  of  the  lens ;  the  o ppropriote
                                                        f/n u m ber m ust be set opposite the red tri-
                                              o n g l e m o r k .   I n t e r m e d i o t e v o l u e s b e t w e e n
                                          two f/numbers con olso be selected. The
                                                                                                                    l e n s    i s  o u t o m o t i c o l l y s t o p p e d  d o w n  b y
                                            pressing the releose rocker (3); wlaen thePre-set diophrogm                                             rocker is releosed the diophrogm outontoti-on Meritor 2.9/50 mm lens (Fig. 7)                                                    c o l l y o p e n s u p o n c e o g o i n  t o   i t s m o x i m i r m
P r e s s t h e o p e r t u r e s e t t i n g r i n g b o c k t o w o r d s   o p e n i n g . T h e p r e s s u r eo n  t h e  r e l e o s e r o c k e i '
t h e c o m e r o b o d y , t u r n   i t u n t i l t h e r e d s e t t i n g   should therefore not be  reloxed until the
d o t   i s o p p o s i t e t h e d e s i r e d f / N o o n d  t h e n   shutter hos closed. To toke time exposures
l e t   t h e   r i n g  s p r i n g  f o r w o r d o n c e o g o i n .      t w o m e t h o d s m o y b e o d o p t e d :  1 ) u s e t h e
O p e n  u p   t h e d i o p h r o g m  t o    i t s m o x i m u m   B-setting of the sh utter o nd screw o co ble

1 0
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r e l e o s e w i t h   l o n g p l u n g e r o n d   l o c k i n g d e -
 ,-,iceinto the releose rocker. pressure con
 b e m o i n t o i n e d  u p o n    t h e   r e l e o s e  k n o b
  t h r o u g h o u t  t h e  d u r o t i o n o f   t h e e x p o s u r e
 without hoving to keep the releose deprs55s6
w i t l r t h e h o n d ( t h u s o v o i d i n g c o m e r o s h c k e ) .
 2) A locking knob (ovoirobrJos on occessory)
 con be screwed into the releose rocker,ond
 by  lifting the lower port of the rocl<erwirl
 d i s e n g o g e _t h e  o u t o m o t i c d i o p h r o g m m e _
cho n ism. The lens is then stopped io*n   to
 o s m o l l e r o p e r t u r e b y  t u r n i n g i n u o p e r t u r e
setting ring. The dioplrrog''' *Ill then remoin
stopped-down to the operture setting se_
 l e c t e d ,o n d   i t   i s t h e r e t h e r e f o r eo l s o p o i r i b r e
to use the T-setting of the shutter.
 In order to check tlre depth of field whilst
 f o c u s i n g , t h e  r e l e o s e r o . [ u r s h o u f d b e d e _
          just. for enough to stop down tlre.pressed.
l e n s t o t h e s e l e c t e do p u i t u r e w i t h o u t r e fe o s i n g
t h e s h u t t e r .

Fulfy-qutomotic spring diophrogm
of T 2.gl10 mm lens fiom Jenq if  ig. 9l :
                         i s p e r f o r m e d b y  t u r n i n g  t h e  f r o n if g . . r s i n g
( d i s t o n c e - s e t t i n g )r i n g .

                                                                                       1 l
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d.esiredf/number but without releosingthe    is in  f ine with the red dot either on the right
 shutter.                                          or  left of the normol red distonce-setting
 Focusing for infrq-red photogrophy           mork. The object of  this  is to ensure tho-t                                                the imoge produced by the invisible infro-
 When using infro-red film, first of oll focus  red roys, which is formed ot o slightiy greoter
 the imoge on the ground-gloss screen.  distonce from the lens thon on imog"  pro- Then      note            the                indicoied                         sublect                                distonce                                                   by                                                               visible                                                                               light,                                                                                            is                                                                   focused                                                                                  u[on'the                                              {.uced (in metres,            or                feet,                    or infinity)                         ond                                                       n e                                   turn the      f                                                                                                                        i l m p l o                                                          o f  t h e c                                                                  o m e r                                                                       o o                                                                          n d s o w i                                                                                                                                                                                                             l l o p p e o r
 focusing ring until the indicoted distonce  shorp in the negotive.


 Using the Finder Hood                      nifier (20). This mognifier springs up  into
                                                 the  operotionol  position when  ihe  Finder
                                      Hood  is opened, but con be folded down
 In the Finder Hood  (12) of the EXA  t o witl    into its rest position by meons of grip (21);
 be seen o  brilliont, upright, ond mognified   see olso poge  4. For detoils on using- the
 reflex.imoge. This con be used for sighting   Fresnel Lens screen, see poge 18.
the subject, composing the picture onC olso   Normolly, the EXA lq   is held ot chest or
for focusing ond (by experimentolly stcpping-   shoulder height (Fi9. 10). The method of hol-
down the lens) for odjusting the depth  of   ding  the comero when using both focus-
field. For generol observotion of the imoge    in-g mognifiers is shown in Figs. 11 ond 12.
 the mognifying ground-gloss screen c,f the  When  toking  verticol-formot pictures with
 Finder Hood will generolly prc'ride c Iorge   the  Finder Hood,  the  photogropher con
enough imoge, bui for criticol focusing it-is   rlqn{  ot right ongles to the subject (Fig.12):
odvisoble to use the hinged focusing mog-    this is porticulorly useful for working unob-
                                                                                                       r 3
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F r s 1 3                                F i s . 1 4                               F i s  1 5

 t l r e  l r e o d ( F i g , 1 4 ) . T h i s i s o n   i d e o l w o y  f o r        i n g  t h e P e n t o P r i s m ( 3 5 ) t o b e  f i t t e d  i n   i t s
t o k i n g p i c t u r e so v e rw o l l s ,h e o d s o f c r o w d s , e t c .  p l o c e w l r e n r e q u i r e d . T o r e m o v e t l r e F i r r c j e r
T l r e E X A   I o     i s m u l t ip l e - s y s t e m c o m e r o :   H o o d   ( 1 2 )   i t  s l r o u l d f i r s t b e  c l o s e d , o r r d
 t h e F i n d e r H o o d   i s  i n t e r c h o n g e o b l eo, l i o w -      t h e n  l i f t e d o u t b y p u l l i n g s t r o i g h t u p w o r d s

                                                                                       1 5
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is virtuolly indispensoble for toking  pictures    is best held  in the  right hond,  using the
of sports events ond other moving subjects.    right thumb  ond  forefinger  for  focusing.
                                       The left hond con be used to provide oddi-
The Pentq Prism (35) is ottoched ond remo-    tionol support, whilst the shutter is releosed
ved from the comero in just the some woy    with the left-hond forefinger (Figs. 16 ond
os the Finder Hood. The comero is olwoys    17). The comero con olso be held upside
held  ot eye level  for  toking  pictures with   down for toking horizontol-formot pictures:
the Pento Prism. The viewfinder eyepiece   the bock of the EXA lo con then be pressed
con be held to either the  left or the  right   ogoinst the foreheod to  give odded  pro-
eye. With both verticol ond  horizontol pic-    tection ogoinst cornero shoke (Fig. 1S).
tures, the  reflex imoge  is olwoys upright
                                           Users who normolly weor spectocles shouldond  loterolly correct  (i. e. the  right woy
                                          use their distqnce glosses for focusing withround); this is o  po.rticulorly useful feoture
                                               the Pento Prism. For detoils on using thewhen photogrophing moving subjects, since                                              Fresnel Lens, see poge 18.they oppeor  to move ocross the viewfinder
in the some direction os they ore  in fqct.   A most importont occessory is the  flexible
When  the subject  is moving very fost, e. g.   Eyepiece Cup  (36);  this  is fitted  over the
with rocing cors, the comero moy be "pon-    eyepiece of the Pento Prism (35) ond  ex-
ned" by swinging  it slowly in the direction   cludes distrocting sidelight.  lt con olso be
of motion of the subject.                   used by spectocle-weorers,ond  it is possible
                                                      to  fit vision-correction lenses (obtoined from
When toking normol upright ond horizontol   your opticion) in its mount.   lt will then.be
pictures with the Pentq Prism (3S),the EXA lo    possible to focus without spectocles.



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F i s . 1 9

Exchonging the focusing screen ond   Remove the viewfinder unit from the comero,
use of the Fresnel Lens screen         g r o s p  t h e  f o c u s i n g s c r e e n b y  t h e e d g e s o f                                                                                                                    i t s l o n g e r s i d e so n d  l i f t i t o u t o f t h e v i e w fi n d e r .
                           W h e n  r e p l o c i n g t h e s c r e e n ,o n c e o g o i n g r i p
                                                                                 it by the  long  sides (ovoid touching the
T h e m o g n i f y i n g g r o u n d - c l o s ss c r e e n i n  t h e   motted su rfoce) o nd press it home between
v i e w f i n d e r u n i t s  f o r  t l r e E X A   l o     i s   i n t e r -      t h e c l o m p i n g s p r i n g s o n  t h e v i e w fi n d e r u n i t .
c h o n g e o b l e . B e f o r e r e m o v i n g t l r e f o c u s i n g   (Witlr the Finder Hood, first close the hood
screen from tlre Finder Hood, close the hood.        i t s e l f. )

1 8
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Insteod of using the ground-gloss screen   the micropiism, incorrect focusing will  re-
 in the viewfinder units (with t6e exception   sult in on imoge which is blurred tJo greoter
 of the stereo-viewfinder) the fresnel screen   degree, Therefore,focusing is eosier, foster,
with microprism field (Fig. 19) moy be used.   ond more occurote. The lens  will be cor-
When  focusing on  this screen, porticulor    rectly focused when the imoge in the micro-
use con be mode  of the potterned  ring,   prism is ot  its shorpest. lt  is, however, ob-
the centre of which is mode up of o micr5-   solutely essentiol to focus ot  full operture;
prism surfoce in order to increose the occu-   with  opertures of   f  5.6 ond  smolier, the
ro.cy.of focusing. The extro brilliont imoge   imoge  in the microprism field will oppeor
which is visible in this centrol circulor fie'id   relotively shorp even with on incorrecily fo-
serves for focusing in the some woy os the   cused lens, ond  this will obviously leod to
imoge on o ground-gloss screen, but with    u nsotisfoctory results.




Looding the film                            lutely essentiol to use only foultless film
                                         cossettes. Doylight-loodingspools should
                                           only be insertedin cossettesl-Lellsmode by
Size of  film:  perforoted 35 mm  minioture   the some monufocturer.
fi!m,  in  lengths of  1.6 metres (5r/2 feet),  Removethe comero bock (32) os desciibed
giving 36 exposures 24 mm x 36 mmln  size.   eorlier in this monuol, insert the cossette
To ensure correct film tronsport  it  is obso-   contoining the unexposedfilm in the film

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chomber (23) (Fig. 20) ond  if necessoryturn
 t h e  r e w i n d k n o b ( 1 5 ) s l i g h t l y t o e n s u r e t l r o t
 t h e d o g s l r o f t ( 2 6 ) e n g o g e s w i t h t h e b o r i n t h e
cossettecore. The slot in the cossettethrough
w h i c h  t h e b " g i n n i n g o f  t h e  f i l m p r o t r u d e s
m u s t  l i e o g o i n s t  t h e g u i d e p l o t e  ( 2 4 ) . R e -
move the tolce-up spool (28) from the oppo-
s i t e f i l m c h o m b e r ( 2 7 ) o n d p u s h t h e b e g i n -
n i n g o f  t h e f i l m b e n e o t h t h e r e t o i n i n g s p r i n g
o n  t h e s p o o l  ( F i g . 2 1 ) ;  t h e n w i n d  t h e  f i l m
round the core of the spool by holf o turn.
R . p l o c e  t h e  t o l < e - u p s p o o l  ( 2 8 )  i n  t h e  f i l m
cho m ber (27) o nd  tu rn it sl ig htly i n the to ke-
u p d i r e c t i o n t o e n s u r e t h o t t h e f r i c t i o n c o u p -
 l i n g  ( S Z 1o f  t h e s h u t t e r - t e n s i o n i n gl e v e r ( 9 )
 i s g r i p p i n g  t h e b o r o c r o s s t h e e n d o f  t h e
spool o nd  thot the spool  is pushed rig ht
h o m e  i n t o  t h e  f i l m c h om b e r .
Now swing the shutter-tensioning lever (9)
right up to  its stop (if necessory first releo-
s i n g  t h e s h u t t e r ) , t h u s d r o w i n g  t h e  f i l m o u t
of the full cossette,over the idler roller (25)
o n d o c r o s s t h e  f i l r g u i d e r o i l s ( 3 t 1 ; t h e  f i l m
s h o u l d b e p u l l e d o s  t o u t o s p o s s i b l e o v e r
the film tronsport sprocket (29) ond on to
the toke-up spool (28). The teeth of the film    Fre.20

20
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fn ploce of the toke-up spool (28), it is olso   cossette, proceed os follows: secure the be-
p o s s i b l e t o    i n s e r t o n e m p t y s t o n d o r d { i l m   g i n n i n g o f  t l r e f i l m  t o  t h e c o r e o f  t h e c o s -
cossette in the toke-up chomber (27).  lt  is   sette so thot  it winds on  f rom the left (i. e.
m o s t  i m p o r t o n t t o e n s u r e t l - r o ts u c h t o k e - u p   from  tlre opposite direction to the normol
c o s s e t t e so r e  i n g o o d c o n d i t i o n : t h e c o s s e t t e  method of  looding o  cossette with unex-
c o r e m u s t m o v e e o s i l y w i t h i n t h e s h e l l o n d   posed f ilm). Then fit the spool into the cos-
n o t  j o m o t o n y p o i n t  ( i f n e c e s s o r yt h e  f r i c -   sette shell o nd insert the cossette into the
tion points of the core moy be rubbed witlr   comero so tlrot the friction coupling (37) of
o   l i t t l e p o r o f f i n w o x ) . W h e n u s i n g o  t o k e - u p      t h e  s h u t t e r - t e n s i o n i n gl e v e r  ( 9 ) g r i p s   t h e

Fis. 22                                                        Fis. 23





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                                          !*mY


22
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bo r ocross the end of the co ssette core o nd    tern, either the stondord holf-width tongue
the film is stretched tout from one cossette   or, even better, o stroight cut ocross the full
t o  t h e o t h e r o c r o s s t h e s l i g h t l yr e c e s s e df i l m  w i d t h o f  t h e  f i l m  ( o s w h e n u s i n g b u l k  r o l l s ) .
tro ck  ( Fig . 24) .                            Wlren employing o toke-upcossette,however,
                                                                                             t h e b " g i n n i n g o f   t l r e  f i l m m u s t b e c u t s o
It is not necessory to cut the b"ginning  of   os to  f it into the core of the cossette (for
t h e  f i l m  t o o n y s p e c i o l p o t t e r n . T h e t o k e u p   method of trim m ing see Fig. 25).
spool of the EXA  I o will occept films with   After toking obout 6 exposures, the rewind
t h e b " g i n n i n g o f  t h e  l e o d e r c u t  t o o n y p o t -    k n o b  ( 1 5 ) w i l l o l s o r o t o t e w h e n  t h e  f i l m   i s
Fis. 24                                                   Fis. 25





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$
 Fis. 26                  Fis  27                                   Fis. 28                                     Fis. 29

r , v o u n do f l , o s o n   i n d i c o t i o n t h o t  i t   i s b e i n g   2 5  t o 4 0 0 o r e  f o r b l o c k - o n d - w h i t ef i l m s r o -
o d vo n ced co rrectly.                           ted in ASA speedsi the white letters ore for
                                              d o y l i g h t - t y p ec o l o u r  f i l m s ( C -    r e v e r s o lf i l m ,
 l m m e d i o t e l yo f t e r l o o d i n g t h e  f i l m , t h e f i l r n -  N C :   n e g o t i v e f i l m ) , w h i l s t t h e  r e d   l e t t e r s
t y p e r e m i n d e r r i n g ( 1 6 ) s h t u l d b e s e t s o  t h o t   o r e  f o r o r t i f i c i o l - l i g h t c o l o u r f i l m s ( C -    r e -
y o u d o n o t h o v e t o k e e p r e m e mb e r i n g w h o t    v e r s o l f i l m , N C :   n e g o t i v e f i l m ) . H e r e o r e
t y p e o f  f i l m  i s  i n  t h e c o m e r o . T u r n t h e  r i n g      f o u r  e x o m p l e s :  1 B D I N   ( b l o c k - o n d - w h i t e
i n  e i t h e r d i r e c t i o n u n t i l   t h e  o p p r o p r i o t e   film),  Fig.26i  200 ASA  (block-ond-white
m o r l < i n g so r e o p p o s i t e t h e r e d d o t . T h e n u m -      f i fm , F t g . 2 7 ; d o y l i g h t - t y p e c o l o u r n e g o t i v e
bers f rom 12 to 30 ore for block-ond-wlrite     f i l m , F i g . 2 8 ;   r e v e r s o l c o l o u r  f i l m  f o r o r t i -
f i l m s r o t e d  i n D I N   i n d i c e s ,t h e n u m b e r s f r o m      f i c i o f  l i g h t , F i g . 2 9 .

24
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Removing the film

W l r e n u s i n g t l - r es t o n d o r d t o k e - u p s p o o l i t  i s
 g e n e r o l l y p o s s i b l e t o  t o k e o n e o r  t w o p i c -
tures oftei' tlre 36th exposure,before the film
c o n n o t b e o d v o n c e d o n y m o r e .  l f t h e s h u t t e r -
tensioning lever (9) stops before  it reoches
 t h e e r r d o f   i t s s w i n g , t h e n  i t  i s n e c e s s o r yt o
d e p r e s s t h e  r e w i n d d e c l u t c hi n g b u t t o n  ( 1 1)
o r r d  t l i e n  s w i n g   t h e   t e n s i o n i n g  l e v e r  ( 9 )
 r i g h t u p  t o   i t s e n d s t o p o n d o l l o w . i t t o s p r i n g
b o c k  i n t o  i t s r e s t p o s i t i o n . T h e  f i l m s h o u l d
n o w b e  r e w o u n d : h o l d  t l r e E X A  I o   i n y o u r
 l e f t   l r o n d , m o i n t o i n o  s t e o d y p r e s s u r e o n
t l r e  r e w i r r d d e c l u t c h i n g b u t t o n   ( 1 1 ) ,  t h e n
p u l l o u t  t h e  r e w i n d k n o b  ( 1 5 ) o n d   t u r n   i t
 i n  t l r e d i r e c t i o n o f  t h e o r r o w  ( F i g . 3 0 ) u n t i l
y o u c o n c l i s t i n c t l yf e e l t h e   l < n o bt u r n i n q m o r e
c o s i l y , w l r i c h r n e o n s t l ' r o t t h e  f i l m h o i b e e n
r c v / o u n d c o m p l e t e l y . T h e n p r e s s t h e  r e w i n d
l < n o b ( 1 5 ) b o c l < i n t o t h e c o m e r o b o d y . R e -
m o v e  t l r e c o m e r o b o c k  ( 3 2 ) o n d    l i f t   t h e
c o s s e t t e c o n t o i r r i r r gt h e e x p o s e d f i l r n o u t o f
the film clromber (23),

                                                    Fis. 3o

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