Zeiss Ikon Universal Jewel User manual

Instructions
                fo1 using the
[Jniversal Jewel
      No.275 l7  for plates 9 xL2 crn
         1\o. 275 /11 for plates 13 x lB crn = cf,.r/.





ZEISS IKOl\ AG. DRESDEN

a. t.u
           ++h w       ,5





      il ->

  n+
  s->


               f           + f  \+    f                                           t           ftn                ayzilg                                                                    8t

            Universal Jewel 1\o. 275l11

n : Lever acting on s to fix the swing back in its
     posrtron
p: Button to fix the swing board
 .s: Struts to fix the bottom board
 a:  Button to actuate the triple extension
    Lever for loosening the shutter
    Catch to loosen or lock the button z (No. 440)w-v:    Button for the use of the double extension



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s ing   the   carneraB"f  ore  u
read the following ,""rr:::::r::  careftilIy, to get thoroughly acquainted utith the                              parts of the apparatus



To open the camera front
press on button ("). The front is then disengaged and
ihould be drawn down till it is held fast by the struts (s/.

-n.
.E OCrrSSIng
             a) by means of the scale
The eamera front, bearing lens and shuttero is drawn for-
ward by pressing the two knob" (SS) together. Pull out
the front on the runners till  it locks automatically.
The lens is then in position for photographing objects
at'ofnfinityo'o marked oo. Focussing for nearer objects is
accomplished by turning the button (r).
This button is locked and before it can be turnedo must
be released by pulling out the lock (y). (This refers to
No.275lIL ) This may also be done by drawing button (z)
out (No.2 7 511)or by pushing the focussing scale itself toward
the runners on which the standard slides. The button (z)
is turned till the pointer over scale (*)  indicates the
distance from the object to the camera. Secure the front
in its position by pushing back the lock (y,) (I\o.275lII),
or button (r) (No. 27517). For focussing nearer objects with
the camera 1\o. 27517, the button (z) must be drawn out,
and to fix the position it must be pushed back again.


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b) by means of the ground glass
 The focussing screen is fitted with a collapsible hood which
 opens by pressing down the spring latch.
 R.egulate the shutrer on Time and open it. Look at the
 picture on the ground glass and moie the standard for-
 ward or backward by means of butoo (r) till the picture is absolutely sharp.

The rising front
 is eontrolled by thg spindle screw (h). when turning
 this, the lens board moves up or down
 This adjustment is used for eliminating foreground, or
 to include more of a-v.ery high object, Juch u"r . steeple or a tree, without tilting the camera.
The cross front
This is goverl"4 br the aetion of knob (i), when thecamera is used for hori zontal views.
 rt is importa_1t that the lens should be in normal position,
      vertically and horizontally, when closing the^camera.lgah'l'here       are white dots on the front which coineide whenthe lens is in normal position.
The swing back 1r"" Fig. III to V)
Pressure on side                              (t,) will loosen the bottom part                     .!                  -a-rTSof the camera, which mai then be fixed either abov'e o,
below its horizontal position byrneans of the overlapping                                                  ilever      _(n)_          of these ride or-s." This arrangement is o"r!
useful when abnormally high or low obj"ects are to bL           Ut1/photographed. The       body must alwaysperpendicular.        "r-"*r                            ""-.it

1



                                                                                                                                                                                                                                                                                                                                                   :l

     A special adjustment permits of the lens-board tilting
                                                                                                                                                                                                                                                                                                                                                                                                                                               l        backward, so that it can be in a perpendicular position,
       when the base board is inclined as seen in fig. IV and V.                                                                                                                                 I
       Thus it will be parallel to the plate, which is of a great
        importance to prevent distortion.
        This adjustment is governed by a pressure on lever (l),
        and the board is fixed.in its position by screw (p/.
     The finder
           is the well known "brilliantoo or reflecting type and needs
       no special explanation.
     A level, attached to  it, serves to control the correct
          position of the camera. Camera No.275/7 is besides fittetl
        with an Iconometer direct view finder with back sight,
        as shown by the illustration.                                            ,,$*i.A                                                   {,               .(
     The use of the single combination
       of lenses
       The carnera is fitted with a triple extension, permitting
         the use of lenses of a very long focal length, or of the rear
        system of symmetrical combinations, or of supplementary
         lenses (Zeiss Distar lenses etc.).
       To use the triple extensiono the standard should be drawn
        out to the end of the bottom board. Then the double
         extension is racked out as far as it will go by means
        of the l:utton (z). The triple extension is governed by
        button (a) and moves in the opposite direction, till the
         pointer stands on the mark oo for infinity.
I        Nearer objects are then focussed on the ground glass by
       means of the button (o).
       When" not using the extension, the bellows should be
         attached by the loops (d) to their respective hooks. When
         using the extension, these loops disengage automatically.


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\/               -:


Symmetrical lenses admit of the rear or front ha]f being
used alone with approximatively twice the focal length
of the complete lens.
This   . results in an image of any particular object being
obtained about twice as large as that given by the double
lens. If the single lens is twice the focal length of the
doublet, it will have only one fourth the speed at the
same actual lens operiing. For instance if this latter is         *
                                                 a secondo                Ifl\  for the doublet requiring for exampl" t/roo of
 it becom es flI6 for the single lens with an exposure time                                    Iof tlru of a second. Unscrew the front lens and draw the
standard to the end of the bottom board.
Then use the button (") to bring out the tlouble ex-
tension  till the pointer on the side opposite the scale
stands on the mark oo for infinitY.
This means that the rear lens is now in focus for infinity.
 If nearer objects are to be focussed, the extension must
be turned further out and the picture examined on the
ground glass.
The rame manipulation can in most cases be done with
the front lens too, but then the use of the ground glass
is necessary for all distances. When using single com-
binations, a smaller diaphragm is usually necess&rlr to
obtain full covering and sharpness.
For the use of the double extension with Zeiss Tessarso
 the Zeiss 'oDistar" lenses are recommended, by means
of which different focal lengths may be obtained with
advantage. In this case, the focussing has to be done by
means of the ground glass.
                                                                                               fiUsing different lenses
The shutter, bearing the lens, ffieY be taken ofi by means               t1
of sprin1 (*). A slight turn of the shutter to the right
 will release it.
When replacing it, a slight turn to the left will fix it,
 spring (*)  will then retain  it automaticallv.

The revolvirg frame
             If a vertical picture is intended, the back of the camera
        must be turned to the left, till the focussing frame is in
         the upright position.
         This is easily done by laying the flat hand upon the back
        frame und exerting a pressure, at the same time turning
         the hand to the left .and the frame will follow.
      To regain the horizontal position, the same operation
        has to be done baekward.
                'TtI'I'he           exposure
       A pressure on spring (k) will release the foeussing frame.
        Take it off and put the slide in its place, where it will
       be secured automatically by spring (k).
         Regulate shutter and diaphragm according to circum-
          stances and then remove the cover of the slide.

                                                                                                                                                                                                                                                                                                                                                       :        Expose by a pressure on the release.

     To close the camera
       Be careful that the Iens board and standard are in their
         proper position marked by white dots. Turn the extension
        back as far as it will go, then secure blutton (z). Grasp
        both knobs (SSJ between fore finger and thumb of the
          right hand, exerting at the same time an inward pressure
,;A       on the scale with the middle finger and then push the
 ['        front into the camera, till  it catches. Release the bottom
     I        board by pressure on struts (s/ and fold it against the
         camera.
  ,,,            If the camera will not close readily, do not force it, but
        look again and make sure that all parts are in their
         proper position.




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