Petri GX-4 User manual

www.butkus.us





INSTRUCTION BOOKLET
GEBRAUCHSANWEISUNG
MOOE D'EMPLOI
LIBRETTO D'ISTRUZIONI
FOLLETO DE INSTRUCCION

ENGLISH

Specification
Camera Type: Automatic 35mm SLR with aperture preferred TTL digital metering system.
Film Format 24mm x 36mm
Fifm eize and capacity: 35mm perforated film in 12,20,24 and 36 exposure cassettes.
Lens Mount Quick release K-type bayonet mount.
Shutter: Electromagnetically  controlled metalfocal plane shutter-verticaltravel.
Speeds from 8 sec5nds to i t1000 second in autoniatic mode and 2 seconds to 1/1000
second + "8" in manual mode."B(Bulb), LT(Long Time) and X(1/100 second)" are provided.
Electromagnetic Shutter release with release lock has cable release provision.
Self-Timer:- Electronic control with blinking LED(lamp) and emitting an electronic tone-
Apprx. lOseconds delay. LED pulsations increase approx. 2 seconds before shutter operates.
Eiloeure Measurement System: TTL open aperture, Center-weighted measurement.
Automatic Mode: Aperture priority system-LED lights against corresponding shutter speed
on viewfinder scale.
                                                        F1.4 - F22l                                  -                                             100 at                   range                                    to EVOperating         exposure                               +19(ASA                    EV -2                                                                 display.                               LED viewfinder             Match                                   with                                16                LED                        systemManual Mode:
Flickering LED indicates coriect shutter speed, steady LED indicates manual shutter speed.
Both LED's should coincide for correct exposure.
Exposure Memory (Lock) System: Exposure information can be locked in memory using
memory lock button
Film Sp6ed Range: ASA 25 to ASA 1600
Viewfinder: Fixed pentaprism type, 1:0.9X magnification at infinity with 50mm lens. 93o/o
view of actual picture field for both horizontal and vertical.
Viewfinder Display Information: Shutter speed information scale with 11 LED indication from
1 second to 1/1000 second, plus B, LT, OVER, M(Manual) and Auto.
"8": Buld
"LT": Long Time. Speed from 8 second to 2 second in automatic mode and 2 second only
in manual mode.
"OVER": Over exposure warning, but even in this case shutter speed is limited at 1/1000
second.

www.butkus.us          ENGLISH

"M": Manual mode.
"AUTO": Automatic mode.
Film Loading: Easy-load system. Six-slotted takeup spool.
fiim lOvanci: 135" Single stroke rapid film advance lever with built-in double exposure
prevention. Standoff angle 30".                                                 _^ _r! ^ _,,E posure Counter: Progiessive type - "S"(slart) to, "36"..Counter automatically resets 9Y
oi;;i;g olcx cover. |6ntrastingi iorange) indibations at "S", "12", "20", "24" and "36"
exposures.
Filin Rewind: By rewind crank and button
Battery Check- By LED metering indicators in viewfinder.
Foi.-isrppii, rlnJi.S voit Snd+ Type Silver Oxide baileries (G-13, EpX76, 5-76) or LR44
Type Alkiiine Manganese Dioxide batteries (A-76)^  .^.,.oirf,insione (Body oirty): 133mm (5.32") x 85mm (3.40") x 48mm (1.92")
Weight(Approx. Body onlY): 450 g
                                                 M F- l6AloiitiLd accessories: plrnt A-uto-Winder and Exclusive Speedlight
      (Specifications subject to change without notice)

Bitte spenden Sie 2,50 Euro, um diese Website über E-Bay zu unterstützen ... www.PayPal.me/butkus

ENGLISH
(1) Description of Controls                       24. Film rail
  1. Film Advance Lever                              25. Viewfinder window
 2. Shutter release lock/Safty lock on symbol       26. Rewind shaft                                                  27. Film advance sprocket
                                                  28. Film rewind button  3. Shutter release button
  4. Exposure counter window                      29. Multi slotted takeup spool                                                   30. Film presure plate  5. Strap lugs
  6. Self-timer switch/blinking LED                   31. Back cover                                                   32. DIN/ASA conversion chart and film  7. Buzzer                                                                pocket                                                    rewinder  8. Bayonet mount lens locking/release                                                                        locating pin socket                                                        windgr                                                      33. Auto    button                                                      34. Winder coupling  9. Fingei dot                                                      35. Tripod/Winder screw socket10. Down button                                                   36. Battery cover11. Up button
12. M'anual mode and "X" button (M.X. button)       37. Winder electrical contacts
13. Automatic mode button (Auto button)           38. Film chamber
14. Hot shoe with built-in "X" contact and
    dedicated flash contact
15. Film rewind crank
16. Film rewind knob
17. Film speed dial
18. Film speed index dot
19. Aperture setting ring
20. Distance scale
21. Exposure memory lock button/self-timer
    cancel
 22. Aperture/distance scale index/depth of
     field scale
23. Focusing ring

www.butkus.us             ENGLISH

(2) Installing the batteries
Your petnt cx-4 is powered by two 1.5 volt Alkaline Mangnese
Dioxide or Silver oxide batteries.
To install batteries:
1. Unscrew and set aside the battery compartment cover, using a
coin or similar item.
2. Insert both batteries with the positive (*) sides facing into thebattery compartment (Negative (-) sides must be facing you).
Refer to the Fig.3-4.
This indication must be watched very carefully.3. Replace the battery compartment cover, making certain it is firmly                       Fig.3
Tightened.
4. To check the battery wind on the film advance lever, then unlock
and depress the (two-stage) shutter release button holfway down.
This will light either two or three LED's (depending on whether the
camera is in "AUTO" or "MANUAL" mode) and confirm that the
batteries are correctly installed and functional.
lf LED('s) fail to light, recheck for correct installation and, if necessary,
replace with fresh batteries.
NOTE:
1) Make sure that the batteries are wiped clean with a dry cloth
before installation.                                                                 Fig.4
2) Take the batteries out when your camera is not in use for a long
or indefinite period.
3) Do not advance the film after taking a picture in order to avoiddraining the battery.     @
4) Lock the shutter release button when your camera is not in use.                       ffi        @

ENGLISH
(3) Loading the film
1. Release the safety lock on the shutter release button by turning
it away from the loiked "L" symbol.
2. Depress the shutter release button to ensure shutter mechanism  is
not cocked
3. Fold out and pull up on film rewind crank and knob assembly until
camera back snaps open.
4. Insert film cassette into the film chamber and push the knob and
crank assembly down until the forked shaft locates with the cassette                                                                                                   Fig. 5spindle.  lf necessary, rotate the knob back and forth slightly to
ensure proper location.
5. Draw film leader across the film aperture and insert in one of the
slots in the film takeup spool. Wind film advance lever to secure film
on the takeup spool, making certain that the film sprocket holes are
properly engaged with the film advance sprockets.
6. With the film rewind crank still extended, rewind the film very
slightly to take up any slack between cassette and takeup spool.
After checking that the film is securely attached and t racking           www.buktus.us
accurately, fold down rewind crank and snap camera back firmly                        Fig.6closed.
7. Look in the exposure counter window which will show the letter
"S"(Start) centered against the index mark Wind on the film advance
lever as then release the shutter, by pressing down on the shutter
release button. Repeat this procedure "O" will appear in the window.
Advance the lever once more and you are ready to make your first
exposure. The exposure counter returns to the "S" position
automatically when the camera back is opened.
NOTE: To confirm that film is being correctly transported, check
the film rewind knob. which should rotate each time the film advance
lever is wound.

www.butkus.us              ENGLISH





                               Fig. 8                               Fig.9

(4) Setting the film speed
For correctly exposed pictures it is important
to set thecx-4's electronic digital metering
systam to coincidi with the ASA or DIN
rating of the film you have loaded in your
camera. To set the film speed: the correct
rating.
1. Rotate the Film speed dial in either
direction until aligns with the film speed index
dot.
2. Insert tab from end of film carton in film
rewinder pocket.
NOTE: A DIN/ASA conversion chart is                                             Fig. 10provided in the pocket on the camera back.

ENGLISH

(5) Selector buttons
4 operation button (AUTO, M.X, UP. and DOWN) are
provided on the key board.
Wnen operating th6 buttons you need to lool< through
the viewfinder to see the functions.
Auto: Push the Auto button when your camera is in
use in the Automatic mode.
M.X.: Push the M.X. button when your camera is in
use in the Manual mode and "B (Bulb)" mode.
1) ln the manual mode 1/125th sec. is automatically
set UP when the MX button has been pushed, each
touch of the up button will double the shutter spe_ed
i.e.1/125th sec. UP 250 sec. UP 500 sec. UP 1/1000th
sec. UP "8".
Down each touch of the down button will half the
shutter speed  i. e.1/125th sec. Down 60 sec., 30 sec.,                                                                                        Fig. 1115 sec. right through to "8".

(6) Automatic (Aperture-Preferred) exposure
In the "Auto" mode, yourcx-4's electronic exposure control system auto-matically computes
and set the correct shutter speed for your prerselected aperture setting, assuring consistently
balanced enposures from 8 seconds to 1/1000th second and indicating "OVER" exposure
condition when available light is too bright.
To take photographs in the "AUTO" mode:
1. Cock the shutter by winding the film advance lever as far as it will go in a counter-clockwise
direction (all the operation buttons are non-functional until the shutter is cocked). Push the
"AUTO" mode button, then the "AUTO" LED in the viewfinder lights while the Auto button is
pushed.

www.butkus.us             ENGLISH

     NOTE: lf your camera has been set in "M.X" mode before you push "AUTO" bqlt_on, the buzzer
       indicates that the mode is changed into "AUTO" mode when you push the "AUTO" button.
             lf your camera has already been set in "AUTO" mode, the buzzer does not sound even  if you
      push the AUTO mode button.
       2. Focus the lens as previously described and set the aperture (f-stop) most favorable to the
       subject by rotating the aperture setting ring until selested aperture number aligns with the
       index line on the lens barrel.
        3. When you push the Auto button, one more LED besides "AUTO" LED will light against the
      appropriate number on the shutter speed scale to the left of the viewfinder to indicate:
       a) Correct relative shutter speed.
       b) Over-exposure  condition.
        c) Under-exposure condition.



   I                  L;I                              &rnrl       I

                                lim'l
                                        l!2511
                                                   160lto    l
                                       l;'
                                           t;
                                    li,ltl                                                             )
                                         f -1 1/250 sec. and AUTO position                  l-2 AUTO position, OVER exposure.  . .   .
                                                                         close down lens aperture
I

ENGLISH





                                                  t-3
                                    AUTO position, 1/4 sec. ....  open up
                                                          lens aperture

     NOTE:
       1) The shutter speed relative to your aperture setting is indicated also by depressing the shutter
      r6lease button half-way down. So, you can confirm again your shutter speed setting before
      releasing the shutter.
      2) When the "LT" LED lights in "AUTO" mode, the shutter speed will be at between 2 seconds
     and 8 seconds.
       4. lf the "OVER" LED light, adjust (close-down) your aperture setting until an adequate shutter
     speed is controlled at 1/1000 second. (l-2)
       5. lf the indicated shutter speed is too slow (under 1/3O sec.)to stop action, adjust (open up)
     your apecture setting until an adeouate shutter speed is displayed to avoid unwanted camera
     movement, although correct exposure is obtained. (l-3)
       In case the indicate shutter speed is still too slow even  if the aperture is opened up completely,
           it is recommended to use cosina exclusive Flash M F- l6A or 22 A
       6. lf the "AUTO" mode button is once pushed, photographing with AUTO mode is continuously
    made as Long as the "M.X" mode button is not pushed.
       7. Recheck composition and focus before depressing the shutter release button all the way to
     complete the exposure.

11

www.butkus.us             ENGLISH
(7) General exposure information
ihe aperture and shutter speed control the amount of light reach.ing the film's surface during
exposure. At a given shuttdr speed, turning the aperture setting ring from the smallest number
(laigest aperture)to the largest number (smallest aperture) reduces the amount of light
reaching the film by one-half at each f-stop setting.
(8) Manual exposure
Fol maximum ereative freedom including specisl etfect photography, yourcx'4'8 electronic
exposure system is designed for manual as well as automatic operation.
To use your camera in the manual mode:
1) Cock-the shutter by winding the film advance lever as far as it will go in a.counter-clockwise
direction (shutter spe-ed readout is non-functional until the s[u_tter- is c^o_c.kgd).
Push the M.X. mode button for manual operation, then the LED ot "125 X" as well as "M" will
light. While the "M.X. button" is pushed, a third LED besides "125 X" and "M" will be flashing
(blinking).
Tne steaily LED (125 X) indicates the manual shutter speed. The intermittent LED indicates the
correct shutter speed relative to the present aperture setting.
NOTE:
a) lt is possible that only "M" and "125 X" will light and no flashing LED will light. This means
that the shutter speed already set will give correct exposure.
b) The manual shutter speed-will rema-ln unchanged at 1/125 second as long as any other
buttons (Auto, Up, Down) are not pushed.
2) The sieady LED is reset by pushing either Up or Down button (depending on your desired
shutter speed), if any other shutter speeds are desired.
The inteimittent LED is moved up or down by adjusting the aperture setting (l-4).

a) Whenever the M.X mode button is pushed, the buzzer will sound.
b) The manual shutter speed will remain unchanged as long as any buttons (Auto, M.X, Up,
Down) are not touched.
c) Whenever either Up or Down button is pushed, the steady LED in the finder remains on for
about 1 0 seconds.                                                                                    12

ENGLISH

      d) In "M.X" mode each time the UP or DOWN gulton is toutched the shutter is adjosted to the
      next speed and the buzzer also sounds.
      e) Whin the "LT" is set the shutter speed is limited at 2 seconds.
         f) When any slower shutter speeds than 1/30 second are set, it is suggested to use tripod, cable-
      release etc to avoid unwanted camera movement.
      3) For correctly balanced exposures, both LED's should be matched (super-imposed) by
     manual adjustment of the shutter speed setting (controlled by pushing either Up or Down
      button) or the aperture setting or both settings.(l-6/7)
      4) Recheck composition and focus before depressing the shutter release button all the way to
     complete the exposure.
      5) Special Effects Photography. (l-8/9)
     The two-LED shutter speed display is particularly useful for special etf ects photography. The
      differential between actual shutter speed ("steady" LED) and correct shutter speed ("intermittent"
     LED) can be manuall! predetermined and preset bymanipulating the aperture setting ring and/
     or UP/DOWN buttons, providing an instant readont in the viewfinder. Each shutter speed
     increment equals one f-stop, so the amount of under/over exposure can be quickly determined
     and adjusted  if necessary.





                                                                                                                                                1 /60                                  1                                                                                  exposure                                                                                                                at                                                                                 Correbt                                        M position                                                      blinking,                         /125                                        sec., 1/8 sec                                                                t-5                                                                                                                                                  1 /250                                                                                                                  at                                                                2EV                                                                                    under Set                                                 use                                                                              sec.                                                 to                                        is recommended                                                   it          l-4 4M EVposition,under                                                                                                                                         . . . means13                   flash gun                                                    sec. in M.X. mode

ENGLISH

   (9) Exposure memory system
   For greater exposure accuracy in difficult back-lighted
    situation, your cx-4 features a memory system which permits
   closeup exposure settings to be "memorized"  until you have
    returned to your original shooting viewpoint to your
   exposure. To use the memory system:
    1. Cock the shutter and push the "AUTO" mode button.
    2. Compose your picture in the viewfinder and note your
    shooting viewpoint.
    3. Approach your key subject, so close as no back light
    visible in viewfinder and set the appropriate aperture.
   Then deprdss the Exposure memory lock button.
    4. Return to your orriginal viewpoint keeping depress the
   memory lock button.
    5. Recompose the picture as before, check for sharp focus
   and depress the shutter release button fully to capture your
    picture.                                                                           F19.12   NOTE:
   Memory is automatically cancelled out when the shutter is
    released.

   (1O) Time exposures
   To take satisfactory time exposure photographs  it is essential to mount your camera on a
    sturdy tripod and use a cable release with a locking device to actuate the shutter. Your GX-4's
    shutter will handle time exposures longer than I seconds by using this method.
     1. Cock the shutter and push the "M.X." button and then push either UP or DOWN button
     until "8" LED light.
     2. Screw the cable release into the top of the shutter release button, which is threaded for this
    purpose.
15

www.butkus.us             ENGLISH
3. Determine the length of.the exposure required and depress the cable releaseto open the
shutter and lock it in position.
4._Measure the exposure time and release the locking device to close the shutter.
NOTE:
Time exposure photographs cq.n!g contjlyed for as long 1!you like providing you not pushany buttons on key board le "AUTO", "M.X.", "Up" and 'iDOWN".
                                      t-10
                                             Operation mode is set at time-exposure
                                      mode
                                                                                            Fig. 13




(11) Self-timer
The electronic self-timer has a delay ot
approximately 10 seconds, allowing you ample  ti
time to release the shutter and get into the
picture yourself. A built-in winking LED and an
emitting tone are provided the winking and
tone rate accelerate approximately 2 seconds
before the shutter trips. To use the self-timer:
1. Mount your cx-4 on a sturdy tripod, using
the screw socket provided.
                                                                                    16

ENGLISH

     2. Compose the picture through the                    5. Self-timer is cancelled by either pushing
    viewfinder, visualizing the position you wish         the exposure memory lock button or
    to assume in the finished picture, then advance      depreising the shutter release button half-
    the film.                                    way down.
     3. Push the self-timer switch.                      NOTE:     4. Depress the shutter release button and take      1) When the self-timer  is working, the    up your picture position remember that the        oberation mode can not be changed even  if    shutter will trip approximately 2 seconds         tde selector buttons (Auto or M.X.) are pushed.
     after the winking frequency accelerates.
    (12) Flash Photography
    Your camera is "X" synchronized at 1/125th second, or at any manual speed setting slower
    than 1 /125th second, for flash photography.
     1) To take flash pictures with the pErnl flash MF- 16A Gun.
        '1. Kit the flash unit into the Hot-shoe, and switch the flash unit on.
     2. When the flash unit is ready, the buzzer will sound.
     3. The shutter speed is automatically set to 1/125 second regardless of previous setting.
     4. The "125X" LED in the viewfinder will be blinking slowly.
      In the auto mode, "AUTO" LED will also blink and in the manual mode. The "M" LED blinks.
      (1 -11 / 1z',)
     5. After taking a flash picture, your pETRr cx-4 will be reset to the original setting until the
     flash gun is fully charged again.
      6. When the flash unit is set on automatic mode, set the camera aperture to f4. (ASA 1 00)
     7. Follow all the instructions/recommendations supplied with your flash unit.
     2) To take flash pictures with any other make of flash.
      1. Setthe camera in the manual mode by pushing the "M.X." button after cocking the shutter,
    the shutter speed is set at 1/125th second automatically. This is the correct speed for flash
     photography.
     2. Instill your flash unit in the hot-shoe, which has built-in "X" contact.
     3) Followthe instructions/recommendations supplied with your paticular flash equipment for
1Z correct aperture settings and properly balanced flash exposures.

www.butkus.us              ENGLISH
 (15) Releasing the Shutter
  1) Unlock the shutter release lock.
  2) When you depress the shutter button, the
  aperture  is automatically stopped down and
  the shutter is released.
                                                                                           Fig. 18


 (16) Rewinding the Film
 To rewind the film after the last exposure:
  1. Press the film rewind button until it is locked in the
 depressed state.
  2. Tilt up the rewind crank and turn in the direction                                       Fig. 19
  of the arrow.
  3. When the film is completely rewound the rewind
 knob will suddenly turn very easily.
 4. Pull the rewind knob against the resistance to
 open the back.
  5. Take out the film.
 6. Press the rewind knob down and close the back                                          Fig. 20"
 cover.
 Note
 Avoid direct sunlight when unloading or loading the film. lf the film advance lever s.tops.
 midway and the film rewind button will not remain in the d-epressed state, then rewind the
, film wfiile keeping the rewind button depressed with your finger. Never open the back
 cover until the film is completely rewound.

ENGLISH

(17) Photography with the Auto-Winder
With the PETRI automatic film-winder you are able to
take continuous or single  f rame pictures at any
shutter speed. Attach the automatic winder to the
bottom of your PETRI cx-4 camera. The auto-winder
is equipped with a very convenient grip and angled
release button. By keeping the release button
depressed a sequence of pictures, at a rate of two
frames per second can be shot. By depressing the
release button and immediately releasing  it, a single
frames may be taken, the film being automatically
wound on to prepared for the next picture.                                   www.butkus.us
                                                                           Fig.21
(18) Depth-of-Field
When the camera  is focused at a certain distance
there is an area on either side of the set distance
which will also be in focus. This is called the "Depth
of Field".
The Depth of Field is affected by the following:-
 1. The smaller the aperture (as the aperture decreases
the "f" number increases eg.t/2 is a wide aperture
 andt/16 is a small aperture)the larger the depth of
 f ield.
 2. The longer the focused distance the larger the
depth of field. The area in focus beyond the set distance
 will always be larger than the area in front of the                                         Fig. 22
 focr.rs distance.

www.butkus.us              ENGLISH

How To Know The Depth of Field Range
A depth of field scale is engraved on every lens when the camera is, fo_r example, focused   .
on tl'ie subject at a distancd of three metres, with the aperture set at f/8, the subject located
within "8 marks" on both sides of the datum line (approximately 2 metres and 5 metres) is
the depth of field area. Subjects within this distance will be in focus.
(19) Infrared Ray Mark
The short red line on one side of the datum mark is
the infrared ray mark, which is used to correct the
focusing when using infrared film and filters. The
infrared ray has a longer wave length than the
visible light range, therefore, the focusing is displaced
being indicated by a short red line.
 lnfrared Photography
 '1. Attach an inf rared filter to the camera.
2. Focus the lens using the red line.                                                                                                 Fig. 233. Set the exposure according to the description on
the film and release the shutter.
 It is probably impossible to focus the camera
with the infrared  filter in position. Either focus with
the filter removed and then replace  it or use the
distance scale.


                                                                           Fig.24

ENGLISH

    (20) Mounting/lnterchanging Lenses
   Your PETRI cx-4 accepts a wide selection of normal,
    wide angle, telephoto and zoom lenses with bayonet
    type mount. To remove or mount a lens:
    * LENZ REMOVAL (Facing'camera front):
    1 - Push the lens locking button 21 tirmly inwards.
    2 - Hold camera securely and rotate the lens counter-
        clockwise approximately 65", at which point the
        lens can be removed.
     LENS M,OUNTING (Facing camera front):
    1 - Match the red indexing dot on the lens with the
       corresponding red dot on the camera body.                                                                                                Fig. 25        PETRI lenses feature a raised "fluorescent
       orange" indexing knob which can be 6ligned with
       the lens locking button by "touch", making it easy
        to interchange lenses in all lighting conditions.
    2 - Rotate the lens clockwise until it locks into place
        with an audible "click".



                                                                                                Fig. 26




23