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Bronica SQ-B User manual

User manual for Bronica SQ-B. 36 pages in English. Read the original PDF, download or print a copy without registration.

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Brand
Bronica
Model / document
Bronica SQ-B
Document type
User manual
Language
English
Pages
36
File size
2.7 MB
Category
Film cameras
Document date
Not specified in catalog

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Page 3 · Read text
Thank you for purchasing the Bronica SQ-B camera kit.
Based on the technology and experience acquired through the evolution of the
Bronica SQ Series, the SQ-B is a manually operating 2114X2114  in. ( 6 X 6 cm)
s i n g l e - l e n s - r e f l e x c a m e r a b u i l t  t o s a t i s f y a l l  t h e n e e d s o f p r o f e s s i o n a l
photographers who works with hand-held exposure meters, studio and/or portable
electronic flash units and various types of accessories. Among the many
professional features of the Bronica SQ-B is flash synchronization at all shutter
speeds, up to the fastest 1/500 sec., which is one of the greatest advantage of the
lens-shutter single-lens-reflex camera.
The following instructions are for the basic operations of the SQ-B, Although
instructions following are based on a standard camera accessories provided with
this kit, the actual choice of lenses, film backs and finders from the collection of
Bronica system accessories is left to the discretion of the photographer, who
should choose what is suitable for the type of assignment contemplated.
To obtain the best results from your Bronica SQ-B, please read this instruction
manual carefully before using the camera.
By thoroughly familiarizing yourself with the camera before use, you should be
able to handle the camera properly and maintain it in good working condition for a
longer period of time.



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Contents
     *'
    Specificationsof
       I h e B R O N I C A S Q - B                               . . . . 2    16. Waist-levelFinderand
    OperationalPartsof the BRONICASQ-B . . . . . .4       InterchangingMagnifiers.      ....19
   1 . L o a d i ntgh eB a t t e r y . . . .                . . . . . . .  7    17. Settingthe Aperture
   2 . B a t t e r y C h e c k i n g                      . . . . . . . . 8     18. FocusingAdjustments.              .. . . . ..22
    3. Attachmentand Removalof Film Backs . . . . 8    19. DistanceScaleand Depth-of-FieldScale. . .23
    4. Constructionof FilmBack.           ....10    20. InfraredPhotography             ....23
   5 . F i l mL o a d i n g                                  . . . . . . 1 0   21. FlashPhotography...             ...24
    6. FilmTypeIndicatorFrame.              ...  . 14   22. MultipleExposures.. .                 ,..25
    7. FilmAdvanceand ShutterCocking. . . . .. . 14   23. MirrorLock-Up                    ....25
   8 . R e m a r k o n E x p o s u r e . . .             . . . . . . 1 4    24. InterchangingFocusingScreens         . . . .28
*   9 . E x p o s u r e C o u n t e r . . . .              . . . . . . . 1 5    25. Removaland Attachmentof
   10. FilmUnloading                           ... 15       the FilmWindingCrank
    11. Settingthe ShutterSpeedDial .        .... 15   26. Attachmentof the NeckStrap        . .. . . . . 30
   12. ShutterReleaseButton             .....   . 16   27. FactsabouttheBattery....        ...30
   1 3 . T i m e( T )E x p o s u r.e. .                    . . . . . . . 1 7    28. Pointerson Shooting                           . . . .31
   14. ExchangingLenses               ....18    29. Careof the BronicaSQ-B                   . . . . .32
   15. InterchangingFinders                 . .....   . 19   ,30. Depth-of-FieldTable.             ....33
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Specifications of the BRONICA SQ-B

Type                  6 cm X 6 cm format,lens-shuttertype single-lens-reflexcamera;with interchangeablelens,film back,
                         finder and focusingscreen systems;withoutexposuremeter couplingmechanismto accept meter-
                          related accessories.
Frame size            55.6 mm X 55.6 mm
Film                 120 roll film with standardfilm Back SQ/B 120; exclusiveaccessoryfilm backs are providedfor use of
                    220 roll film, 135 cartridge-loadedfilm and PolaroidLand pack film.
Lens                                    fnterchangeabletype. Standardlens Zenzanon-PS/B80 mm, t/2.8; 6 elementsin 5 groups; multi-
                        fayer anti-reflectioncoated; 50.7" angle of view; tl22 minimum aperture; intermediateaperture
                         settings;helicalfocusingfrom infinityto 80 cm.
Filter sizes           67-mm diameteron Zenzanon-PsiB80 mm lens.
Lens mount            Exclusivefour-clawBronicaSQ bayonetmount.
Focusing               Helicalfocusingsystembuiltinto each lens;angle of focusing171" Ior standardlens.
Shutter                 ElectronicallycontrolledSEIKO #0 between-lensleaf shutter;shutter speeds 8 sec. to 1/500 sec.;
                        withoutintermediatesettings;mechanicalcontrol1/500second;with shutterreleaselock.
Lens aperture           Fully automaticinstantreopeninglens aperture;equal-distantaperturescale graduationin half-stops
                        increments;depth-of-field preview.
Film winding           Film windingcrank;one completefonvardrevolutionor ratchetedwindingaction.
Cable release socket    ISO Standard.
Multiple exposure       Multipleexposure possiblewith lever on camera main body.
Mirror lock-up           Mirrorlock-uppossiblewith switchleveron the side of camerabody; singleor continuousmirrorlock-
                     up shootingpossible.


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Specifications of the BRONICA SQ-B
      m*s
'      Film back               Daylight loading interchangeabletype; exclusive film backs lor 120,220 and 135 roll films and
                              PolaroidLand pack films.TheSQ-B does not couple with meter when finderswith built-inexposure
                            meter are attached.
      Finder                 lnterchangeablefinder system; 94 o/ool actual field of view (remains unchangedwhen finder is
                            exchanged).Exposuremeter incorporatedfinder unit does not activatewhen attached.
      Finder screen          Interchangeabletype; standard microprism/split-imagescreen; optional screens are split-image,
                             microprism,matte,grid-lines,microprism/split-image(for 135 film) and matte (for 135 film).
      Flash synchronlzation  X-setting(up to 1/500sec.)with ISO Standardcontactterminal.
       Battery checking        Red-colored LED lights up in front center area, outside screen area, when baftery check button is
                            depressed,LED also doublesas shutterclosingsignal.
      Battery                 Single 6-volt silver-oxidebattery (4SR44) or alkaline-manganesebattery gLR44).
      Dimensions           92 mm wide X 109 mm high X 179 mm long (withstandardlens, Film Back SQ/B 120 and Waist-level
                             FinderS/B).
      Weight                1,460grams (withstandardlens, Film Back SQ/B 120 and Waist-levelFinderS/B).

                               -Specifications                                          are subjectto changewithoutprior notice.
         6,1{"''js
                                                                                                                                                                                                                                                                                                                                                                     )lIIi                                                            3l
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OperatlonalParts of the BRONICASQ-B





                         Shuttersoeed dial





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Loadlng the Battery

The electronically-controlledshutter
will not work without loading the
b a t t e r y .  T h e s h u t t e r w i l l b e
mechanicallycontrolledwhen the
battery is not loaded and will be
released at 1/500 sec., regardless
of the setting on the shutter speed
dial. Use one 6-volt silver-oxide
b a t t e r y o r a l k a l i n e - m a n g a n e s e
battery.
. The battery may be obtained at
any photographicequipment or
electricalapplianceshop.
                                        A. Depress the battery chamber         B. Coincidethe plus (+) and minus
                                          button and, at the same time, move             (-) marks on the battery with similar
                                        the battery chamber cover in the          polarity indicationsin the battery
                                     arrow-indicateddirection. The        chamber. Then, push in the battery.
                                        cover will come off easily.                   Insert the battery chamber cover
                                                                                            into the "BATTERY" end first and
                                                                           then move the cover in the other
                                                                                   direction (opposite to the arrow
                                                                                            indication)until it locks.
                                                                                                                               -                                                                     The shutter will be mechanically-
                                                                                        controlled (at 1/500 sec.) when the
                                                                                        battery is loaded with polarity marks
                                                                                   reversed.
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The film back is a film chamberthat              - The accessory Film Back SQ/B
                                     can be attached or detached at any        120 does not have the film soeed
                                           time, permittingrapidchange of film        and exposure compensationdials.
                                                                            t y p e s  e v e n  d u r i n g  s h o o t i n g        This film back can be attachedto
                                       sessrons.                               other SQ camerasbut the exposure
                                The main camera body and film         meter,if applied,will not operate.
                                      b a c k a r e  f u l l y c o u p l e d , u p o n
                                        connection.therefore, always turn              -  lt is possibleto attach a film back
                                        the film winding crank completely        incorporatingthe film speed and
                                  one time, upon attachingthe film        exposurecompensationdials to the
                                       back.  lf winding is not possible,all        main camera body of the SQ-B but
                                    preparationsfor taking pictures         finderswith built-inexposuremeters
                                      h a v e b e e n c o m p l e t e d . B u t ,  i f             will not activate.
                                      windingis possible,rotatingthe film
lf a red-coloredbattery check LED      w i n d i n g c r a n k u n t i l i t s t o p s w i l l
l i g h t s u p o u t s i d e t h e  f o c u s i n g        a u t o m a t i c a l l yt a k e c a r e o f  t h e
screen area (centralfront of finder),       incompleteactions, whether the
when the battery check button is         shutter not fully cocked or film not
p r e s s e d , t h e b a t t e r y i s  l o a d e d           fully advanced. Thus, it is always
p r o p e r l y a n d t h e r e i s s u f f i c i e n t       possibleto choose the film type
power for operations.             m o s t s u i t e d f o r  t h e s h o t , e v e n
                                  midwayin the roll..  lf the LED does not light up,              Additionalfilm backs includinga
(1) the batteryis not loadedproperly        Polaroidfilm back are available
   or,                                     optionallyin 6X6, 6X4.5 and 35-mm
(2) the batteryis completelydrained        formats.
  and shouldbe exchanged.
                                                      *                                        Refer to the instructionssupplied
                                        with Film Back SQ 135 for proper
                                    use of that particularfilm back.

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Page 12 · Read text
Attachmentand Removalof Film Backs





A. To attach the film back to the          B. To remove the film back from the         C. Depress the film back release
main camera body, simply insert        main camera body, insert the dark         button and the lower end of the film
the latchesat the upper end of the          slide into the dark slide slit. as        back can be removed, as illust-
f i l m b a c k  i n t o  t h e a t t a c h m e n t          illustrated,with the O mark on the          rated. Simply shift the film back up
openingsat the upper end of the         dark slide at the top end. Push it all          slightlyand pull it away.
main camera body. Then, press         the way in.
t h e  l o w e r e n d o f  t h e f i l m b a c k                                                                                              . The dark slide cannot be with-
againstthe main body until it locks                                           drawn from the film back when the
securely.                                                                                    film back is detachedfrom the main
                                                                    camerabody.
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Attachment and Removal of
   Fllm Backs

' The dark slide must be withdrawn
from its slit, upon attachmentof the
f i l m b a c k t o  t h e m a i n b o d y , a s
otherwisethe shutter cannot be
released. Furthermore,there is
danger of the film back accidentally
becoming detached from the main
body,shouldthe dark slide be left in
its slit while the camera is being
carried. Therefore,make it a rule to
withdrawthe dark slide promptly
upon attachingthe film back to the
main body.

                                The film back consists of a film       A . O p e n   t h e b a c k c o v e r b y
                                       holderwhich will be loaded with a        squeezingthe back cover release
                                                    roll of film and a film back frame        b u t t o n t o w a r d e a c h o t h e r , t h e n
                                     which completelyenclosesthe film        remove,the film holder.
                                        holderand shieldsit from light.
                                                                                                             *                                                                                Note, when you load the first roll                                                                            .                                 The Film Back SQ/B 120 is for          after opening the camera package,
                                      exclusiveuse of 120 roll film. For        an empty film spool is in the bottom
                                                                                               l o a d i n g 2 2 0  r o l l f i l m , u s e  t h e         spool holderand you do not need to
                                          optionalFilm Back SQ-i 220.                transferthe empty film spool from
                                                                                  the top to the bottom film holder as                                                               -                                   To take other format oicturessuch         instructedin the next column.
                                    as 6 X 4.5-cm,24 X 35-mm,24 X
                             54-mm or Polaroidpictures,use
                                        exclusivefilm backs.
                                     (See attached "Bronica SQ-System
                                      Accessories".)
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Fllm Loadlng




                                                                          6
                                                                       G@



                                                                                  E O

                                                                                                                                                                                                                                                                                             ' X -

                                                      @  t


                                                                                                       o


                                                                                                      o


                                                                                                      o


B. Remove the empty film spool         C. After loading the fresh fitm spool        D. Rotate the film back winding
pre-insertedin the top spool holder         properly,draw out the leading end        crank on the right side of the film
of the film holderby pushingup the          of the film and turn it acrossthe film          insert in the direction indicated by
s p o o l i n t h e a r r o w - i n d i c a t e dA         pressure plate (as illustrated). Run                 t h e a r r o w , w h i l e c h e c k i n g t h e
direction. Insert the empty spool to                  it down and turn it over to the take-        advancingfilm.
the bottom spool holder by pressing        up spool. Insert the leading end       When the starting point, or arrow
out the left-hand bottom shaft and           into the slit of the take-up spool and        mark, is aligned with the triangular
aligningthe spool key hote with the        wind slightlyuntilsecuretyengaged.       V start-markon the top left side of
right-handshaft.                                                                      the film insert, stop rotation.
Insefta fresh film spool into the top              - The inside black surface of the
spool holderaligningthe right-hand        leader must face out when running
key hole of the film spool with the         acrossthe pressureplate.
top right shaft then, close the left-
hand shaft to securelyhold the film
soool.


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Film Loading





E. The startingpoint,or arrow mark              -  lf the film is not advanced when        F . C l o s e  t h e b a c k c o v e r , b y
of the unexposedfilm, can also be         the film windingcrank is rotated,the         pressingit firmlyagainstthe base of
alignedwith the start-mark,with the           film holder is not insertedproperly        the film back, as illustrated. The
film insert loaded in the film back.         (A) and/or the main camera body        back cover will automaticallyclose
Simply rotatethe film windingcrank       may be set for multiple exposures       and lock.
on the main camera body. This          (B). In the latter case, return the        The same operation will close the
method is oreferredsince there will      m u l t i p l e e x p o s u r e l e v e r t o a n        back cover when the film back is
be couplingwith the main camera        uprightor verticalposition.            detachedfrom the main body.
b o d y m e c h a n i s m ,  f r o m    t h e        (See "22, Multiple Exposures"on
beginning.                        Page25.)



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Film Loading


                                                                        120 roll film



                                                                                                             Starting mark

                                                                     220 rollfilm


                                                                                        Dotted    t-Startino -
                                                                                                          line        mark
G. Upon loadingthe film, rotatethe         H. The manual film winder is used                 . When loading 220 roll film in the
film windingcrank until it stops to           for advancingthe film, when the film         Film Back SQ-i 220, do not mistake
place the first frame into place for        back is detached from the main        the dotted line before the arrow
taking the picture. The exposure       body for film loading. The manual       mark for the startingmark.
counterwill also change from "S" to           film winder can continue to rotate,
"1", while the shutterwill also be        even when the film is set for the first
cocked.                                exposure.  lt should be rotated 2 or
                                      3 times more, in order to take up
                                    any slack in the loadedfilm.





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The Film Back SQ/B 120 inctuded         After completingexposing one roll       The number on the shutter speed
in the kit takes 12 pictureson one          of film (12 exposures),continue         s c a l e i n d i c a t e st h e s e t s h u t t e r
roll of film. The exposure counter       winding until the leader paper is        speed. For example"8S" is 8 sec.,
beginsat "S" (Start),and as the film        completelywound up, or approx-        "2S" is 2 sec., "2" is 1/2 sec. and
is advanced to the first frame it         imately 8 full turns of the advance        "500" is 1/500 sec. Intermediate
displays "1".The counter advances         crank. Then, open the back cover        speed settingsare not available.
with each exposure and proceeds       and take out the film holder.                Shutter speed setting range on the
through numericalsequence to an        Take out the take-up spool from the         Bronica SQ-B is from 8 sec., "8S",
orangenumber"12",after which the                 f i l m h o l d e r , w h i l e h o l d i n g t h e         upto 1/500 sec. "500" and does not
counterdisplaysan extended stripe        e x p o s e d f i l m s o  t h a t  i t w i l l n o t                      i n c l u d e B  ( b u l b ) a n d T  ( t i m e ) .
also in orange, indicatingthe roll is        unwind. Sealthe exposedfilm.               Installationof the PS lenses other
finished.                                                                        than the PS/B 80 mm allows for "T'
When you use the SQ-i 220 Fitm                                                     settings.
Back which takes 24 pictures, read                                                                              ( See "13 Time (T) Exposure"on
above descriptionsreplacing the                                         page 17.)
number "12" wilh "24".

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Settlng
    the Shutter Speed Dlal

- The shuiler speed setting can be
changedbeforeor after film winding
operation.
. The shutter is released at 1/500
sec., regardless of the settings
when the battery is not loaded, or
battery power is insufficientfor
normalshutteroperation.




                                   Depress the shutter release button       The shutter blades will close and
                                          with a smooth,gentleaction.Do not         there will be under-exposureif the
                                          force or jerk.                                 film winding crank is accidentally
                                                                            rotated before the exposure is
                                                                -                                       Followingthe shutter release,a         completed,as in the case of a slow
                                                                r e d - c o l o r e d L E D w i l l   l i g h t u p          shutter speed setting. In this case,
                                     momentarilyin the front centralarea                t h e n e x t  f r a m e m a y a l s o b e
                                             of the finder and will indicatethat        exposed and result in an improper
                                         the exposure has been completed.       exposureas well.
                                      Carefully observe this red LED,
                                                                                                                                                        .                                      e s p e c i a l l yw h e n a s l o w s h u t t e r         Although the battery will not be
                                   speed is released.Do not wind the        drained by an accidentalshutter
                                               film beforethe red LED lights up or        release button depression, it is
                                  you will forcefullyterminate the         strongly recommendedthat you
                                          c a m e r a o p e r a t i o n b e f o r e  i t   i s          lock the shutter release button by
                                      comoleted.                                               r o t a t i n g t h e   l o c k i n g r i n g a n d
                                                                                coincidethe orange dot to "L" when
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Shutter Release Button

camera is not in use to prevent
accidentalshutter release.
- The shutterreleasebuttonwill not
be operable in such cases listed
below as a part of camera's safety
m e a s u r e   t o p r e v e n t i m p r o p e r
camera operations.
1. Shutterreleasebuttonis locked.
2. Dark slide is inseded.
3. Film is not advanced.
  (Samewhen exposurecounteris
  between"S" and "1".)
4. Shutteris not cocked.
5. Lens is not attached properly.       Time exposure is not possiblewith         B.  Slide the time exposure lever
  (Same with automaticextension        the PS/B 80 mm lens suppliedwith        and releasethe shutter,when a red-
   tubes,too.)                            the SQ-B camera kit.                     colored "T" is exposed on the lens
6 . L e n s r e l e a s e b u t t o n i s d e -       When one of other Zenzanon-PS         barrel. The shutter will stay open
   pressed.                            lenses is attached,time exposures        u n t i l t h e t i m e e x p o s u r e l e v e r i s
7. All frames (i.e., 12 frames for         c a n b e m a d e w i t h   t h e   t i m e       moved in the opposite direction,
  120 roll film and 24 tor 220 roll        e x p o s u r e  l e v e r o n   t h e    l e n s ,        exposingthe letter "A", which will
   film) have been exposed.              regardlessof the setting on the         close the shutter.
                                          shuttersoeed scale.
                                                                                                                               -                                                                           Exceptfor time exposures,always
                                        A. First, cock the shutter with the           shift the time exposurelever so that
                                               film winding crank and then pull up         the letter"A" is visibleon the lens
                                                                            t h e  t i m e e x p o s u r e  l e v e r  l o c k          barrel and keeo the time exoosure
                                         release.                                  lever lock releaseoushed in all the
                                                                          way.


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Erchanging Lenses

The lens cannot be attached or
d e t a c h e d u n l e s s t h e s h u t t e r i s
cocked.
T h e r e f o r e .f i r s t . r o t a t e t h e f i l m
winding crank and cock the lens
shutter.





                                        A. To attach the lens to the main       B . T o d e t a c h t h e  l e n s , t h e f i l m
                                     body, align the orange dot on the         winding crank must also be rotated
                                   main camera body and the red dot          to cock the lens shutterfirst. Then,
                                   on the lens, and then insertthe lens         press the lens release button down
                                                  fully into its mount. Rotate in the        and, at the same time, rotate the
                                     counterclockwisedirection until it         lens in the clockwisedirectionuntil it
                                        stops, with an audibleclick, which       makes a full stop, at which point it
                             w i l l  i n d i c a t e t h a t  i t  i s s e c u r e l v           will be oossibleto detachthe lens.
                                         locked.




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A. The waist-levelfinder can be         B. To detach, simply depress the         A. The focusing hood of the waist-
interchanged,with other optional         finder releasebutton,while, at the          level finder is opened by pushingup
f i n d e r s ,   t o m a t c h  s h o o t i n g         s a m e  t i m e , s l i d i n g t h e  f i n d e r       on the focusinghood catch at the
c o n d i t i o n s w i t h p h o t o g r a p h i c       backwardswhere it can then be         rear end of the folded waist-level
conditions. To attach the finder,        taken off by lifting.                           finder.
align the front end of the finder with
the front end of the finder frame on                 . Finders incorporatingexposure              - Althoughinstructionsare based on
top of the camera main body, as        meters can be attached but the         the waist-levelfinderincludedin this
s h o w n . T h e n g e n t l y l o w e r t h e        meter will not activate.                     k i t , y o u m a y c h o o s e t h e P r i s m
finderand, when well-seated,slide                                            FinderS and other finder units to
foruvarduntilit locks.                                                                         suit your photography.





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Waist-levelFinderand InterchangingMagnifiers





B . T h e m a g n i f i e ri s f l i p p e d i n t o         C. To close the focusinghood, first,        D. The standardmagnifiersupplied
viewing position,by simply sliding       push down the magnifier(if it is in         with the waist-levelfinder has a
t h e r e l e a s e l e v e r i n  t h e a r r o w        viewing position). Next, Press in        power of -1.5 diopters,which can
indicateddirection.                     both side frames, as illustrated,       b e e x c h a n g e d f o r o t h e r s w i t h
To store the magnifier,simPlyPush        and, at the same time, Press the        powersof -4.5, -3.5, -2.5, -0.5, +0.5
it down until it catches.                       front frame back towards the rear.       and +1.5 diopters. These oPtional
                                  The focusinghood will automatically       accessoriesshouldbe purchasedto
' The magnifiercan be exchanged       be foldeddown.                           s u i t   t h e  u s e r ' s e y e s i g h t ,   i f
for one matchingthe eyesightof the                                                 necessary.
user.                                                                      Simply rotatethe magnifierframe in
                                                                                the counterclockwisedirection to
                                                                           unscrew.
                                                                               Attachin the reversemanner.


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A . T h e  l e n s  i s  f o c u s e d o n  t h e          B. The centralsplit-imagespot splits
subject, by rotating the focusing         the image into two, with the upper
r i n g  i n e i t h e r d i r e c t i o n ,w h i l e       and  lower  halves separated
c h e c k i n g  t h e  e f f e c t o n    t h e          horizontallywhen the lens is out of
microprism/split-imagerange finder         focus. When in focus, however,the
spot in the center of the focusing        two halves will coincidewith the
screen (standardtype).                 displacementdisappearing. The
                                   microprismring surroundingthe
                                           central spot can also be used for
                                          c h e c k i n g t h e s h a r p n e s s o f  t h e
                                       focused image, since the image will
                                                      glitter when the lens is not focused.
                                The surroundingfull-area matte
                                          s u r f a c e c a n a l s o b e u s e d  f o r
                                      checkingoverallimagesharpness.

 22                  www.orphancameras.com
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      DistanceScale and Depth-of-FieldScale


                                                  OepOofno|d raryoelft22,





A. Distancescales on the Zenzanon         depth-of-fieldscale is next to the                 I n  i n f r a r e d p h o t o g r a p h y ,s o m e
PS lensescan be used for focusing        distance scales and is made up of        adjustment must be made in the
at the required distance or finding          identical pairs of apertures on both         focus in order to retain sharpness
t h e d i s t a n c e a c t u a l l y f o c u s e d .         s i d e s o f   t h e  o r a n g e - c o l o r e d       on the film, Becausethe invisible
Simply rotate the focusing ring and        distance index. These identical         infrared rays are longer in wave
set the required distance opposite        p a i r s o f a p e r t u r e s i n d i c a t e t h e         lengththan the visiblerays used for
the orange-coloredindex to focus         distance zone in focus at these lens         focusing. For infraredphotography:
on an requireddistance.                 openings. For example, if the 80           1. Use a R filter or equivalentwith
                         mm lens, stopped down to t/22,  is          an infrared (black-and-white)
B. There is an apparent zone of        focusedat a distanceof 3 m (10 ft),             film.
sharpness,the depth of field, both         the depth-of-fieldscale shows that          2. The red-coloredline, next to the
in front and back of the focused         the zone will extend trom 2 to 7 m           orange-coloreddistance index,
sublect. The depth-of-fieldscale          (7 ft. to 23 ft.) atl/22.                                 is the infraredindex.
s h o w s  t h e z o n e o f a p p a r e n t        (See the depth-of-fieldtable for the         3 . A f t e r f o c u s i n g i n t h e n o r m a l
sharpnessat any lens opening or        Zenzanon-PS 80 mm lens, on page       m a n n e r , r e - s e t t h e d i s t a n c e
distance and can be utilizedfor         36.)                                        indicatedby the orange-colored
ascertainingthe depth of field. The
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