Corfield Periflex User manual

GETTING TO KNOW THE CAMERA PARTS                     3

  The names given below are referred to freguently in the instructions. By checking the numbers with
those on the illustrations, you can see their position and appearance.

     (r) CAMERA BACK LOCK                       (t0) REwtND BUTTON                                                                                                                                                                            i
    (2) F|LM CHAMBER FOR CASSETTE                   (il)  TRTPOD EUSH                                            l
    (3) TAKE UP SPOOL                          (r2) vtEw FTNDER (TNTERCHANGEABLE)
    (4) FtLM TRANSPORT KNOB                   (r3) FOCUSSTNG EYEPTECE
    (5) FtLM REW|NDING KNOB                   (r4) LENS (TNTERCHANGEABLE)
    (6) DR|V|NG DOGS FOR REWTND KNOB         (r5) D|STANCE SCALE
    (7) REMOVABLE BACK                        (16) DEPTH OF FTELD SCALE
    (8) SHUTTER WtND AND SETTTNG KNOB         (t7) APERTURE SCALE
    (9) EXPOSURE COUNTER                      (r8) SHUTTER RELEASE

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THE ,,PER!FLEX "  Ul36                       screen. This is viewed ar a high magnification
                                                   through the eyepiece and permits  crirical focussing
                                                                     in such a manner as to give the best possible overall
  Your discernment  in choice of camera will bring      definition of the lens.
 its reward for the " Periflex "  is a Universal
Camera, suited with its accessories to all aspects of
photography. lt is instantly ready for use, easy ro      The subject is viewed and the picture composed  in
operate and has the handy feel of a well-bred     an optical eye level finder giving a brilliant image,
camera.                                          which is not cut off at the moment of exoosure.
                                              The viewfinder is interchangeable.
  To get the most pleasure from your camera you
should be perfectly familiar with its operation; this        Corfield designers have made the " Periflex "
booklet serves that purpose and we hope you will     with interchangeable lenses and viewfinders so that
find it sufficientl/ interesting to be read thoroughly         it will never need to be put aside for more advanced
before attempting to use the cameia.                work. With the normal focus lens it is ideal for
                                                general photography. Special lenses for  long
 A special and unique feature of the " Periflex "      distance, close up, architectural and scientific work
is the small mirror inside the body, which reflects     are in preparation together with accessories to
a part of the field of the lens on to a ground glass     extend and enlarge its scope.

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  To replace the back, engage ir correctly over che
guides at either side of rhe camera, leaving only a
small gap berween rhe top of rhe back and the rop
plate of the camera. When correctly engaged,
slide it gently inro posirion and rurn rhe lock (l)
until resistance is felc.  lf this lock fouls do not use
force but make su re thar che back of che camera
is firmly home.

SHUTTER AND FILM vvIND

                                   Winding on the shutter is accomplished by a
                                       three-guarter turn of the knob (8) in an anti-
                                         clockwise direction and should be completed in one
                                 movement by a combined twist of the camera with
                                     the left hand and of the knob with the right. Be
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                                        sure to turn right to the stop.

                                   The film is transported by a half turn of the knob
                                          (a) in rhe same direction. Be sure to turn firmly
                                             against the stop.

                                     There is no danger of double or blank exposures.
                              The shutter release will not operate until both
                                     shutter and film are wound. The number of
                                          ex.posures left is automatically counted and is seen
                                              in the aperture in the knob (4).

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SETTI NG SH UTTER SPEEDS                                         lf the shutter is required open for long periods, a
                                                              special cable release should be used with a lock to
                                                keep the release button depressed. This is known
  The shutter speed is indicated by the index mark     as a time-lock cable.
on the knob (8) when the shutter is wound up. To                                         The cable release is fitted by unscrewing theset the speed lift the knob (8) and turn it until the                                                        protective guard around the button and screwingexposure time required is opposite the index                                                    the cable release to the uncovered thread.mark; then let the knob (8) drop back.

  The engraved figures indicate fractions of a
second, i.e., 30 means l/30 second, 250 means
 l/250 second, and so on.

  For longer times of exposure set index mark to B.
On depressing the shutter, release button (18) the
shutter will open and remain open until the button
is released. Longer times are measured by counting
or checking with a watch.

FOCUSSING                                  image of the main subject appears critically sharp.
                                             The eye may be close ro the eyepiece or some little
  The sharpness of the .image can be observed by     distance away to suit the user. The small knob
looking into the focussing eyepiece above the    must be released before operating the shutter, it
viewfinder and depressing fully the knob on its     will then return automatically and collapse the
side with the right thumb. For best results rurn     mirror assembly.  lt should be noted that both the
the milled ring by the distance scale (15) to and fro    ground glass and the mirror move in a fixed tube.
with the thumb and finger of the left hand until the    This cuts out all possibility of incorrect focus due
                                                    to the mirror not seating properly.

                           THE LENS APERTURE
                                              The diaphragm is adjusted by turning the milled
                                                 ring to the aperrure scale (17).The number
       www.butkus.us                                   opposite the index mark is called the " f " number.
                                                  Large " f " numbers indicate small lens openings,
                                             while small " f " numbers indicate large lens
                                               openings. The larger the opening (i.e., " f "
                                         numbers 3.5, 4), the shorter is rhe required

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          exposure time, but the use of a large opening     When you want your camera to be instantly ready
            involves a reduction in the depth of field, that is     for action with the greatest possible depth of field,
          to say, that objects in front of or behind the     set it to the highest " f " number you can use with
             principal subject will be less sharp than when small    an exposure of l/60 second. Then set the infinity
           openings (" f " numbers  I l, l6) are used.            mark co against the " f " number in use on the
                                                                right-hand side of the depth of focus scale. The           To guide you the depth of field scale (16) has " f "
         numbers engraved on either side of the distance
         index. The distances coinciding with the aperture,l         in use show the furthest and nearest points which
           are acceptably sharp. l      A good method of using this scale is ro focus on
          the nearest object required to be sharp and note
          the distance against the index mark. Then focus
          the furthest object required to be sharp and nore
          the distance. By rotating the distance scale a pair                                              :"--fn             of " f " numbers are found to span the two distances.                                  ,    \-/
          This number will be set on the aperture scale and
           the exposure adjusted to suit it.

nearest distance in sharp focus will be indicated by      The film is not spoiled because of the focal plane
        the corresponding  " f " number on the left-hand     shutter which covers it, but this operation should
          side of the index.                                     always be carried out in the best available shade.
          Example:-ln the illustratlon the aperture ln use
            is f4 and the depth of field is seen to extend from
                                                              of different focal lengths can be inter-         15 feet to 30 feet. lt will also be seen that at fl   I      Lenses
                                                                                                                                lens        the depth of field would be from just over l0 feet    changed with the standard one. A short focus
        and almost to infinity.                                    (e.g., 3.5 cm.) will include more of the subject
                                                  from the same viewpoint.  lt also has a greater
                                                           depth of field.
      LENSES
         The lens supphed with your camera is the normal      Long focus lenses include less of the subiect and
        one giving a moderate angle of view.  lt has a focal                                                           enable " close up " pictures to be taken of distant
         length (distance from lens to film) of 5 centimetres                                                            sublects. They are also available for photographing
         (2 inches).                                                               small nearby objects because they allow of a greater
                 It can be unscrewed from the camera by gripping    working distance between the lens and the subject.
                                                                    recommend lenses for         firmly and rotating in an anti-clockwise  direction  We shall be pleased to
         (looking on front).                                         special applications.
k

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     CLOSE.UP PHOTOGRAPHY         HOW TO LOAD THE .. PERIFLEX  ''

      A great advantage of the removable lens is that     The Periflex uses standard 35 mm. Cine-film and
       an extension tube can be screwed into the camera     gives 36 exposures 24 mm. by 36 mm. (l inch by
                                                             on a length 1.6 metres (63 inches).       body and the lens screwed into the extension tube.      lI inches)
        This enables the lens to be focussed on very close
                                               The film is available throughout the world in        objects without the use of supplementary lenses.
d                                                    standard cassettes to fit the camera. Certain
   I       The chart shows the distances at which the various     cassettes can be reloaded with refills or bulk film.
   I{      extension tubes enable you to work. With the
           Periflex "  ),rou do not need to measure these    A useful accessory for the bulk film user is theIt      "        distances since you have the advantage of reflex    scratchproof cassette which uses no velvet light
       focussing. At close distances depth of field is very    trap, but is opened completely when inserted in
        small and it is usually necessary to stop down.         the camera.
      When using extension tubes the effective " f "     Remove the camera back (see preceding in-
      number is increased and the exposure indicated     struction). Insert loaded cassette in film chamber
      by your meter or calculator should be multiplied     (2) engaging driving dogs (6) with the bar in hollow
       by rhe factor shown in the chart.                    end of the central spool.

Pull out a small length of film with the white    the fogged film will be clear of the picture aperture.
        emulsion side towards the lens. Do not pull out
                                               Wind up shutter and release by pressing button       more than 4 inches of film. Press rewind button
                                                         (18). Then wind on film to stop, wind shutter         (10) and turn transport knob backwards until slot
                                                     again and release. The third time will  bring        in take-up spool faces back of camera. Insert
                                                          unexposed film into position and a proper exPosure           I inch of free end of film into the narrow slot in                                                          can be made.  lf the counter does not now indicate        take-up spool (3) and bend over sharply with your
                                                     36 exposures (or 20 for most colour films) left in      thumb. The strip of film must run straight from                                                        the camera, it is set to this figure by pressing the                                                     I,{s.I         cassette to take-up spool and the edge of the film                                                                                                                               t1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             i'j                                                  rewind button and turning the transPort knob       must be against side of take-up spool.
                                                           backwards and forwards through a small angle.
         Turn winding knob in direction of arrow to the                                4
        stop to take up free length of film. The film winds
       on to spool with emulsion side inwards.

           Replace camera back as described earlier, making
       sure cassette remains in ProPer Position. Lock
        the camera back.

       Now two frames must be advanced in order that
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  .    REHOVING THE FILM               FLASH PHOTOGRAPHY
                                              The Periflex has built in synchronisation for        =
           Aftertaking 36 exposures on a standard length of     Flash bulbs and Electronic flash. Only one socker
         film (lesser number in the case of most colour     is used and there are no special dials to set. All
           films, which we use in shorter lengths for economl   that is necessary is to set the shutter to a speed
          in purchase)  it is necessary to rewind the film into    recommended in the accompanying table for the
        the lightproof cassette.                            type of bulb in use. This automatically selects the
                                                             correct delay necessary to ensure even exPosure.
          Hold the camera in your left hand, pressing the    Always Press the release firmly and follow right                     i
       bnaon (10), The other hand turns the rewind    through with the action'
                                                                                                                                                          .;        knob (5) in direction of arrow'
                                                      The two mosr economicar systems of frash photo-
                                                        graphy are (a) F type midget bulbs, e.g., Speed           :
         Correct rewinding is indicated 6y the film     Midget, pFS, SFS, and SF; (b) Electronic flash.
                                                                                                                                                                                                                                                                                                                                                                             :
       :fr:r;j";''.*].':il:J:i]1.lJ::':::::.:;|neithercasetheshutterissetto|i30second
        transport knob (4) will stoP. Now oPen the    Most flash guns in these classes are fitted with the
       camera and remove the cassette containing the    standard 3 mm. co.-axial plug, which is suited to the                                                                                                                                                                                                    j
       expced film.                                      camera socket.                                                                                 ,l

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