Pearl River - 4 User manual

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PEART RIUER-4
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CHINANATIONALLIGHT INDUSTRIALPRODUCTS
     ITIPORT& EXPORTCORPORATION

7
 PEARLRIVER.4


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        General Descripticn

     The Pearl River-4 is a coupled twin-!ens camera
  with viewing lens and photographrclens of t:3.5 and
 ?5mm. focal !ength for 12 pictures, size 6x6cm.
  (2+" x 2+")  on  roll film No.  t2o. Both lenses are
  coated in purplish blue. The picture can be composed
  directly through the ground glass screen and the
  tocus can be ad justed automatically by rotating the
  focusing knob. The  shutter speeds on  this camera
  a r e   t f z s .    t / s o .    t / t o o \      t f z s o   s e c o n d a n d B . A
                                                           (tx"  self,-timerand a flash socket through which the
  flashgun can be used in full synchronizationare well
  provided. The  f ilm is advanced by the  f ilm tra nsport
  knob and counted through the film ceunter window.


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1 .  Mugnifier
 2 , Focusing hood cover
 3 . View-finder $lap
 4 . Vie.wing lens
 5 .  Shutter-tensioning lever
 6 .  Photographic lens
 7 .  Shutter release button
 B . Front hood
 9 , Upper film spool knob
 l o .  Flash contact
1I. . Depth of  field scale
1 2 . Focusing knob
1 3 . Diaphragm lever
1 4 . Self-timer lever
1 5 . Lowe r  f ilm spool knob
1 6 . Back cover locking lever
l'7 , Rear hood
1 8 . Releasing button for view-
         f i n d e r  f l a p
 l g .  Film-transport knob
2 0 '  Film counter window
2 L . Tripod bush
2 2 . Back locking knob
2 3 , Film-pressure plate
2 4 . Upper film chamber
2 5 . Lower fifm chamber

LoadingFilm

                       1 . Turn the back  locking knob  in the  direction

                              of "O"  arrow mark and lct  the  locking lever

                        extend  forward. Then open the back cover.

                                            ( F i e . 1 )
                    2 .  Pull out the  lowe.r Film spool knob and insert

                           the  roll Film into the Fixed spool knob. Then
Fie 2
                         press down the  roll Film and push the lower
                        F i f m s p o o l k n o b   i n w a r d .  ( F i g . 2 )
                           3.  Pull out the front end of the protective paper
                           o F F i l m a n d    i n s e r t  i t    i n t o   t h e w i d e r s l o t o t

                                                      t h e  t a k e - u p s p o o l i n  t h e u p p e r c h a m b e r . T h e n

                           tighten  the  protective pape r by turning the
                        F i l m t r a n s p o r t k n o b a b o u t a  r o u n d .  ( F i g . 3 )


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4.  Close  the  back  cover.  Then  turn  the  back  locking  knob  in  the
    direction of "C"  arrow mark and let the locking lever move backward
    until  the  back cover  is Fastened.
Rv a   Pull out  the  cover  of  film  counter  window.  Advance  the  film  by
    turning the  film transport knob  until the number "l" aPPears in the
    film counter window.   lt shows the  first picture  is ready. (Fig.4)
6.  After the  first  picture is taken, you can turn the  tilm  transport knob
   continuously For the next picture  until the $inal picture is completed.
7 .  AFter the  picture having been  taken, turn the  film  transport knob
    continuously about  6-7  rounds. Then open  the back cover, pull out
       t h e u p p e r  f i l m  s p o o l k n o b a n d  t a k e o f t    t h e  r o l l  f i l m .  ( F i g . 5 )





                                                                                         Fie 4





                         Fig 5

ReleasingShutter
( 1) Tension the shutter by pulling
   down the shuttertensioninglever
     to the bottorn until a click  is
     heartJ. ( Fig. 12)
(2)  Af ter tensioning shutter pressthe
    shutterreleasebutton gentlY and                                              F i g  t 2
    then a picture taking is accom-
    p l i s h e d .( r i g .  t 3 )
( 3 ) Wh e n a ca b le re le aseis used,
    unscrew the  knurI  nut on the
    shutterreleasebuttonand screw
     in the cable release.


                                                                                             F i g    l 3

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Depthof Field

     \flhen  you  focus  the  camera on  a subject
there  is a certain  range  extending  in  front  oF
and behind  the  subject  within  which  other  ob-
jects  will also appear sharp. This range is called
the"Depth  of Field" and it varies with diaphragm.
The larger the diaphragm, the shorter the Depth
of  Field, and  the  smaller the  diaphragm, the
longer the  Depth oF Field. The figures on the
Depth  of  Field  Scale  indicate  the  diaphragm
number and on the  footsing knob designate the
distance  in metre.  After  focusing, the  distance
figure pointed by the same two diaphragm figures
indicates  the  Depth  of  Field  in the  condition
of  that diaphragm opening. For instance, it  the
camera  is tocused  to  3 metres  with  diaphragm
opening  t6 the  Depth of  Field  is approximately
from  2.3  to  5  rnetre.

TakingFlashPicture

                   Pearl River-  Camera can be used in
                                       trx"               conjuction  with       flashgun  in  full  syn-
               chronization. Insert the cable plug into the
              socket  of  flash  contact and  adjust  the
               shutter speed and the diaphragm accord-
                                                rrx"               ing  to  the  character of       flashgun.

       Usingthe Self-timer

              When  the  sel$-timer is opplied  the
            camera should be stabilized with a tripod.
                Pull down the shutEer-tensioning lever first
              then push the  self-timer  lever under the
                shutter,  the  shutter  will go into  action  at
               the  time  of  8-to  seconds after  pressing
                the  shutter  button.

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Notice

l.  The  Pearl  River-4 camera can be used  twice  or more  times  for  exPosure.
    \ilhen  the  first exposure has been accomplished, pull the  shutter-tensioning
   lever once more and then  the seccnd exposure may be continuously carried
    out. The same operation  may be continued  i$ more  exPosure  is necessary.
    lF two or more times oF exposure are unnecessary, the  film should be turned
    to the  next number as soon as one  picture has been  taken so as.to  prevent
    double exposure.
z,  The  Pearl River-   camera  is suitable to  tdke the  filters  of  33 mm diameter
    and the  sun-light cover of 37 mm diameter bayonet.
 3. The lens is the most important part o$ camera.  lf  dust is Found, remove  it
    carefully with  camel hair brush and then wipe  slightly with  lens-paper. Be
    sure that  dor,'t remove  it with  handl'.erchief or  finger.
 4.  As the camera  is a precision product,  it should be used and stored with great
    care. Protect   it  against dust  , moisture, shock and heat.