Graflex Speed GRAPHIC User manual

Directions                              for Operoting
   THE, SPE,E,DGRAPHIC





    open the cameraby pressingthe coneealedspring at the top; swing
the bed down until the spring-actuatedside arms lcck the bed in ex-
tended position. Grasp the front standard clamp and clraw the lens
standardout to the "infinity stop" fastenedon the bed track.

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FOCUSING    When the lens is set at the "infinity  stop" the white line
              on the foeusing pointer, attached to the base of the lens
standard, should be in  line with  the 100-foot mark on the graduated
focusing scale on bed of camera. When focusing upon objects nearer
than 100 feet, the lens is advanced into focus, by means of the focusing
pinion N,  to a point on the focusing scale representing the distance
from the camera to the point focused upon.

THE FOCUSING     The spring actuated Foeusing Panel L  is pro-
PANEL                vided with side shields to facilitate focusing upon
                       the Ground Glass Screen.  This  panel recedes
to aeeept the Graphic  Plate Holder  or Film  Pack Adapter.  When
the Plate Holder or Film Pack Adapter  is withdrawn from the camera,
and the curtain aperture O (open) is registered at F, accurate focus of
the full negative size image can be obtained by varying the position of
the lens with the focusing pinion N.
    The adjustable Rising and  Falling  Front,  on the lens standard,
affords means for vertical centering of the composition with  the expo-
sure aperture.

THE VIEW    A  Direct  Vision View Finder R,  is located on top  of
FINDER        the camera.  The subject being photographed can be
               centered with  the exposure aperture by means of the
sighting bar S, and the vertical and horizontal  lines engraved on the
finder lens. When not in use the finder is folded down and compactly
closed.
    The Shutter Speed Table T, attached to the camera, gives approx-
imate shutter speeds in fractional parts of seconds, obtainable with the
various curtain apertures O, 1%, 3A, )(  and  rf, and the tension num-
bers t to 6.

THE CURTAIN   When the letter O,  "full opening," appears at F
APERTURE        the shutter  is wide open.  The  other apertures
                        116,, 3A, )(  and  rl  follow  in rotation  at F as the
key A is turned to the left.

SETTING  THE    The shutter is set by turning key A to the left, un-
    SHUTTER                    til  the  curtain  aperture  indicated on the speed
                            .           Plate for a certain exposure, is registered at F.    If
      the curtain is already set so that any one of the aperture numbers lf,
      Y4, )4 or rA appears at F, release the curtain by pressing shutter Re-
      lease M  until the proper aperture is in position.
         The 3rA x 4rZ speed Graphic is equipped with a Focal plane shut-
       ter having but  four, instead of five curtain apertures, and the speeds
     range from  "time"  to  slo second. The shutter curtain  is wound  in
      opposite direction to that on the other models.
    CAUTION     The dark stide of Plate Holder,  or Film  pack Adapter
                  MUST BE IN POSITION WHE}I THE SHUTTER  IS sBT:  otheT-
      wise injurious fogging of Plate or Film  will result.
    REGULATING  THE     Tension on the curtain  is regulated by turn-
    SHUTTER  SPEED       ing the milled head B to the right  until  the
                                tension number  indicated  on  the  Shutter
     Speed Plate for a certain exposure, appears at G.  The numbers run
     from 1 to 6-the  highest number indicating the greatest speed.
         To decrease speed of shutter, release tension on shutter curtain by
     pushing escapement P back and forth  until  the required lower tension
     number is registered at G.
    INSTANTANEOUS     When the shutter has been set in accordance
    EXPOSURES             with  the  above  directions,  the  exposure  is
                        made by carefully pressing Shutter release M,
      or plunger E of the Cable Release
    EXAMPLE     For an Instantaneous Exposure zl; s€cords, use eurtainv,t*                    aperture  tl  and tension No. 5.  To  set shutter  for  :$,
     seeond, wind the tension to No. O.
    TIME           wind  or release the  curtain  until   r   (rrun)  appears
    EXPOSURES     at F.  Set the tension at No.  l;  rest the camera upon
                     a rigid  support; open the shutter  with one pressure
     upon release M  or E, and terminate the exposure by a second pressure.
     Immediately after an exposure is made, a Plate or Film should be plaeed
       in position for the next exposure.f

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i"         DEPTH OF FOCUS
.   Depth ,of Focus of Tield expressesthe ability  of a lens to give a sharply defined
lmageot both near and distant objects.. It is impossilrleto seeure-speedand-- grbat-     delrthof focus at the same time, except with lensesof^a very short foeal iength.
    The.degreeof depth dependsupon the relation between the focal length of lens and  .stop used.
    The depth of- focus increasesas the fo-callength of lens and diameter of stop de-
cre&ses. Focus a lens of known focal length upon-a point at the h1'perfocataistarite of--
the stop used and objects beyond one-half that distance from cameid,will be in focus.
    Ex&mple.:QT/gin. Lens-Stop F.16-Point  of Focus, 43 ft.:Area  in Focus, 2l  f.t.oIrom c&merato rnhnrty'
                    HypERFocAL   DISTAN.ES
    The following tables are based upon a circle of confusion of .sg6inch.
  STOP F    4 . 5   5.6     8           16    22    32
      4Y8'                      57',     40'         29',       20'            l4'                    l o '
  Er
  9   a      5%,',     tt2'                       63',       46''   2;a Ar-tf':                                       --d-32'         23',         t6'           Fl                                                                          '        li     Fl                                      E 5 '         62',                      3t'        2 t '     6rA',        l 5 l
   : l r r
 < - t   ?W     208'                                t t 1 '         8 5 '         59'       43',        29',
      8r4,',            2 t 5 '                             7s',              38',

   When   it  is required.that  subject be sharply  defined throughout   its area, foeus upon
a point.at  th-e hyperfocal  distance,  in large figuies on table, foilens  and stop designaied,
and objectg-frorn about one-half that  distanee   Ztr4  feet-from  c&mera to infinity"will  be
in focus.  With  next smaller stop nearest object  inlocus   will be about 16 feet.

-    The nearer the point.focused  up_on the greater  the loss in depth  of focus, unless the
lens stop is decreased in diameter  sufficiently" to give the required'shu.p^e."     ii,  .t  i""tr   i"foreground and background.
     Table showing  the nearest and  farthest  objects  in focus when  focusing  lenses of ,.-
different  focal lengths, with  stop F.8, upon a poiit  at different  distances frorir camera.
              DISTANCE OF SUBJECT FOCUSED UPON
  STOP F.8          6 FEET
       434'       62',-95',      g'-17' F
       5rA'       65',-7go      10'-15'             i , 2rFl- t 2.|l
  )-'{  Fl      634"      67',-7go   101k,_1332
 Fl rr
 ^ < o   7Yz"    BBr/2'-70'  LO%',-L3/2'
  fr        8r/z'      69'-750      11'-13'

SUGGESTIONS
    Find the subje.cl                                      th" exposure for movement at right                     .gro3p, ?tldanglesto camerawill be found in the squareon the line oi i'distance"of
object" and under "focal length of lens.,^'
                      t""t:|",;.,
                                   Motor Boar
                     Distance               50 Feet
                        ln""q  _ofSubject        30 Nliles per hour
                    il;Aik""":th.orl'ens .  \K"or a second
   The shutterspeedsgivenarenecessaryto stopthe motion. The lens
opening must be regulated to meet the prevailing light conditions.
     FoI bright  da{..1it is suggested that_ stop F.g be used with exposures  .
rls to a;ro;F.5.6 with exposuiesglo to '*o; F.4.5 for exposrr.r .&u to ro,oo.
     o.               or dull. days,                          same exposure, proportionately  larger          \^ry                              -with,    -lens openings should be used.
       It  is not advisable to operate the shutter at a higher speed than  is
necessary-to stop movement of the subject, thereby gaining the advan-
tage of full exposures and the ability  to use'smalleri.ir   opfii"gs,  which
wrll give greater depth of focus.
    To decrease a give!                            .shutter spegd 's"econdt/  for rnovement  at 4b degrees,or 24 for          -oncoming. subjects_, use the         lower rp..a  o1 Grafle*
exposure plate for 1/ less, and the fifth lower exposure for  ft  le,ss.
              Example:
   '                  'gi8
                        Rightangles-* 933
                 4b degrees; !( tess-r  $i3                                 295
             Towardcamera;fu less-t  i8f
                                       160

  THE FOLMERGRAFLEXCORPORATION
               ROCHESTER, N. Y.

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[],f-trtil      ( illflex  rie'qativc sliorild be  lrrintcd on
Vclox.    It  is tlre onlv paper made ersllcciull.yfor
ltrnltt('ul' negatit'es: it meets their r{,r1uirt'rnt'ntsas
rro otlrt'r lxtller cit-rr.
   I''irrislir.r'skuon' this lind that  is x'h_vso many of
tlrem ust'nothing hut\-elor in their contact printing
l'o0ms.
   Iior  \-our  protection,  and  to  iclerntif.y clua"lity
Iinislit'rs u'ith  rluality  n'ork, each sheret of  \-erlrlr
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             Look Irr  "\:elo.r" on the back
      I.]AST}TANKODAI{ CON{PANY
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