Zorki ZORKI 4K Parts list manual

Zorki-4K Brief Description
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Zorki-4K
Brief Description.
1. Purpose
ZORKI-4K is a single-lens rangefinder camera intended for taking various amateur and professional
pictures on black-and-white film.
The camera is provided with a shutter setting lever and a self-timer and is “M” and “X”
synchronized.
The viewfinder and the rangefinder of the camera have a common field of view and the camera
eyepiece is provided with a device for adjusting it according to a particular eyesight. Such a design of
the viewfinder ensures perfect focusing at the moment of picture taking.
The lens is focused by turning its focusing ring. In so doing the rangefinder operates automatically
irrespective of the focal length of an interchangeable lens.
The camera uses a new type of a take-up spool to simplify the camera loading.
The camera accepts standard cassettes with invariable slit.
The camera is delivered in two variants: with INDUSTAR-50 or JUPITER-8 lens.
2. Specifications
Frame size, mm . . . . . . . . . . . . . . . . . . . . . . . . . . .
24×36
Perforated film width, mm . . . . . . . . . . . . . . . . . .
35
Number of frames for one loading . . . . . . . . . . . .
36
Focal plane shutter speeds . . . . . . . . . . . . . . . . . . .
1 to 1/1000 s (automatic), “B” (by band)
and slow shutter speed
Mechanical back focal distance, mm . . . . . . . . . .
28.3
Viewfinder eyepiece magnification, times . . . . . .
1.15
Eyepiece adjustment, diopters . . . . . . . . . . . . . . . .
±2.5
Thread of shutter button for cable release . . . . . . .
КФ 3.5×0.5
Tripod bush threa, inch . . . . . . . . . . . . . . . . . . . . .
¼
Lens
INDUSTAR-50
JUPITER-8
Nominal focal length, mm
50
50
Relative aperture range
f/35 to f/16
f/2 to f/22
Focusing range, m
1 to “∞”
1 to “∞”
Field of view, grades
45
45
Lens seaing thread
М39×1
М39×1
Lens mount thread for light filters
СпМ 35.5×0.5
СпМ 40.5×0.5
Seat for sun shade, mm
Ø37
Ø42
Overall dimensions of camera
without case, mm
143×88×94
Mass of camera without case, kg
0.6
0.7

Zorki-4K Brief Description
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3. General Instructions
The present Manual contains brief description and main rules of using the ZORKI-4K camera, but it
should not be regarded as a handbook on photography.
Before starting to use the camera thoroughly study the operating procedure according to the given
Manual.
The camera is a complicated optical mechanical device which should be handled carefully, kept
clean and protected from blows, moisture and sharp changes in temperature.
Load and unload the camera in diffused light trying to avoid direct sun rays. When removing the
camera cover see to it that the cassette would not fall out.
Set shutter speeds only with the shutter cocked. Do not turn the shutter speed dial over the interval
between figures “30” and “1”.
Always set the shutter till stop to avoid blank frames during exposing. If the shutter fails to set,
check the position of the shutter release button and the shutter disengaging bush. Before setting the
shutter they should be turned in the clockwise direction till stop.
Do not point the lens at the bright sun to prevent curtains from burning through.
Do not touch surfaces of optical details with hands since this is likely to damage their coating.
Clean the coated optical details only from outside with a clean soft piece of fabric or cotton wool
slightly moistened with rectified alcohol, ether (petroleum or sulphuric), or, if these means are absent,
with toilet eau-de-Cologne.
To close the case with the camera in it check that:
a) the case tripod screw would be tightened up;
b) the lens would be set at mark “∞” of the distance scale;
c) the shutter speed dial would be set at any shutter speed except for those from 1/60 to 1 second.
When using the camera in frosty weather (below —10°C), keep it under your street-clothes, taking
it out only for the moment of photographing.
If the camera is brought from cold in a warm room, do not take it out of its case for 2—3 hours to
let it take the temperature of ambient air.
Keep the camera in a closed carrying case. In so doing the lens should be capped and the shutter and
self-timer should be released.

Zorki-4K Brief Description
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4. Main Units and Details
Fig. 1. Front view.
1 —self-timer lever;
2 —self-timer release button;
3 —flash lamp socket;
4 —rangefinder window;
5 —range-viewfinder window;
6 —lens;
7 —detachable cover locks;
8 —tripod nut.
Fig. 2. Top view.
09 —diopter adjustment lever;
10 —attachment groove;
11 —shutter speed dial;
12 —synchronization scale;
13 —shutter release button;
14 —exposure counter dial;
15 —shutter setting lever;
16 —synchronization scale index mark.

Zorki-4K Brief Description
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Fig. 3. Rear view of camera with cover removed.
17 —range-viewfinder eyepiece;
18 —film rewind knob;
19 —cassette spool guide;
20 —sprocket;
21 —take-up spool;
22 —shutter disengaging bush;
23 —film track slide.
Fig. 4. JUPITER-8 and INDUSTAR-50 lenses.
24 —ring with aperture scale;
25 —focusing ring with distance scale and index
mark of aperture scale;
26 —depth-of-field scale;
27 —aperture setting ring with index mark;
28 —focusing ring with aperture scale
and distance scale;
29 —depth-of-field scale;
30 —lens mounting ring.

Zorki-4K Brief Description
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5. Preparing for Picture Taking, Picture Taking
5.1. Camera Loading
Turn off the screw on the case bottom and remove the camera
from the case.
Raise two locking clips on the camera base plate and turn
them as far as they will go; move the cover along its grooves and
take it off the camera. Place the cassette with film in the seat and
put it on the cassette spool guide.
Pull the film end out of the cassette as long as to the camera
edge, insert it in the take-up spool slot. See that a sprocket tooth
would enter a perforation hole.
Insert the detachable cover into the camera guide grooves and
move it as far as it will go. Give the locking clips half a turn till
stop and then sink them into their recesses.
Set the shutter, press the release button. On setting the shutter the film moves by one frame. To
advance unexposed part of film to the film gate set and release the shutter two times.
Before releasing the shutter after the second setting set figure “0” of the exposure counter dial
against the index mark on the shutter setting lever.
If the film is wound tightly in the cassette, the film rewind knob will rotate when the shutter is
being set. Should the film be wound loose in the cassette, the knob will fail to rotate at the initial
frames. Now you can put the camera into its case. Do not forget to tighten up the tripod screw in the
case bottom.
5.2. Shutter Speed Setting
Shutter speeds may be set only with the shutter set. Pull up the
shutter speed dial and turn it till a required shutter speed value is
set against the index mark. Release the dial in such a way that it
would be fixed without pressing.
Figures on the shutter speed dial denote corresponding
fractions of a second and letter “B” — hand-controlled shutter
speed.
To obtain an exposure longer than 1 second, set the dial index
mark against letter “B”. In this case the shutter stays open till the
release button is pressed.
To obtain a still longer exposure the release button can be fixed in this position by turning it
counterclockwise as far as it will go. The exposing over, return the button into the initial position.
To avoid mechanism disengaging, do not rotate the button without need.
It should be remembered that to set the shutter speeds of 1, 1/2, 1/4, 1/8, 1/15, 1/60 of a second, an
additional effort is required to wind an additional delayed-action mechanism spring. When the shutter
speed dial is being reset for a shorter exposure time, the delayed-action mechanism is heard operating.
Besides it, when shutter speeds of 1; 1/2; 1/4; 1/8; 1/15 and l/60th of a second are used, the shutter
speed dial is fixed somewhat higher as compared to other shutter speed settings.
5.3. Lens Aperture Setting
Match a selected aperture value with the index mark (dot) by rotating the ring with an aperture scale
of JUPITER-8 lens (or the ring with the index mark of INDUSTAR-50 lens).
For convenience each of the indicated lenses has two equivalent aperture scales and two
corresponding index marks.
5.4. Focusing
Objects having sharp contours should be selected for focusing.
Watching through the range-viewfinder eyepiece, turn the diopter adjustment lever to obtain the
sharpest image of an object in the eyepiece.

Zorki-4K Brief Description
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In the centre of the viewfinder field of view there can be seen
a yellowish rectangle with a double image of the object being
viewed in it. Turn the lens focusing ring to match the two
images of the same object. Keep in mind that the image should
be focused in the centre of the yellowish field.
The image can be focused by the lens distance scale
calibrated in metres as well. In such a case the distance to the
object being photographed should be known beforehand.
The viewfinder enables to see the limits of picture.
For correct framing bring your eye as close to the eyepiece
as possible; in so doing the yellowish rectangle should be
placed in the centre of the view-finder field of view. If the
above rules are not followed, framing is likely to be wrong i. e.
the limits of image seen in the viewfinder would fail to
correspond to the frame limits on the negative.
To take a picture of several objects placed at different
distances from the camera, use should be made of a depth-of-
field scale. The scale consists of the aperture numbers repeated
on both sides of the main index mark. When the aperture is set
and the lens is focused, the limits of depth of field can be read
against these number pairs on the distance scale.
For example, with the lens focused for 3 m and aperture of
f/8, two figures 2.2 m and 4.8 m on the distance scale will be set
against divisions 8 of the depth-of-field scale.
These distances are called the near and far limits of depth of
field. Objects placed nearer than 2.2 m or farther than 4.8 m, will
be blurred in the picture. The far limit of the depth of field may
coincide with the infinity mark “∞” or even come beyond the
distance scale. In such a case all the objects placed between the
near limit of depth of field and infinity will be sharp on film.
It should be kept in mind that the larger the aperture, the smaller is the depth of field and vice versa.
5.5. Photographing
To take a picture do the following:
a) load the camera;
b) take the cap off the lens;
c) set the lens aperture (if required put a light filter or a sun
shade on the lens);
d) set the shutter;
e) set a required shutter speed;
f) watching through the eyepiece of the range-view-finder,
point the camera at the object, adjust the eyepiece according to
your eye and focus the lens;
g) smoothly press the shutter release button.
NOTE. When using shutter speeds slower than 1/30 s it is
recommended to mount the camera on a tripod and to screw a
cable release into of the release button bush.
5.6. Camera Unloading
When the exposure counter shows figure 36 rewind the film into the cassette. For this aim:
a) remove the case;
b) turn the shutter disengaging bush in the clockwise direction as far as it will go;
c) pull the film rewind knob upwards and rotate it in the arrow direction till the feel of the applied
force indicates that the film end has left the take-up spool;

Zorki-4K Brief Description
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d) take the cover off the camera and remove the cassette;
e) turn the shutter disengaging bush counterclockwise as far as it
will go.
If the shutter setting lever fails to set in action the shutter
mechanism after rewinding the film, turn the release button clockwise
as far as it will go or turn the shutter setting lever simultaneously
holding the sprocket. Set the shutter and relese it to check the
mechanism operation.
Mount the cover on the camera or load the camera with another
cassette with film according to paragraph 5.1. “Camera loading”.
6. Self-Timer, Synchro Socket, Lens Changing
6.1. Self-Timer Operating
The self-timer is used when one wishes to photograph oneself. For this
aim do the following: mount the camera on a tripod, set the shutter and
set the self-timer by turning the self-timer lever downwards as far as it
will go.
Set a required aperture and shutter speed; select an object and focus
the lens.
Press the self-timer release button and take your place in front of the
lens. The shutter operates in no less than 9 seconds after pressing the
button.
The ZORKI-4K camera allows to use flash lamps when taking
picture with the help of the self-timer.
6.2. Photographing with Flash Lamps
To take pictures in conditions of poor illumination flash lamps are
used. For this aim plug a tip of a flash lamp connecting cord into the
camera socket.
To use a flash bulb set letter “M” of the synchronization scale
against the dot on the camera plate.
When an electronic flash is to be used, letter “X” should be set
against the index dot of the synchronization scale.
The shutter speed of 1/30 is better to use when photographing with
flash lamps, i. e. when gating is full. Hand-controlled exposure “B” is
not desirable when using flash lamps, since a considerable amount of
stray light gets into the camera and may result in a blurred image.
Note. When photographing without flash lamps, the synchronization scale position may be free.
6.3. Lens Changing
The Z0RKI-4K accepts all the interchangeable lenses intended for
ZORKI type of cameras.
To change a lens set the shortest distance by the distance scale and
screw the lens out of the camera by turning it counter-clockwise.
When screwing in an interchangeable lens, be sure to set it at the
shortest distance as well.
To take pictures with interchangeble lenses viewing should be
performed with the help of a universal or individual viewfinder
which should be set in the camera attachment groove.
Interchangeable lenses are focused in the same way as the main
(standard) one.
The Picture is taken
with a 135 mm lens.

Zorki-4K Brief Description
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However, it should be kept in mind that any changing of the main (standard) lens for another one
requires additional adjusting of this lens to the camera.
REFERENCE TABLE
of sensitivity units of different sensitometric systems forphotographic materials
of normal contrast (y=0.8—1.0)
ГОСТ-ASA
16
20
25
32
40
50
65
80
100
130
160
200
250
320
400
500
DIN
13
14
15
16
17
18
19
20
021
022
023
024
025
026
027
028
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