Pentax Slide Copier User manual

'The Pentai Auto Bellows A used'with a'Pentax'     :..ii:
Bayonet Mount camera and any of the SMC
Pentax lensesis all you need to be ready for                   :
a wide range of photography from close-up   ,
work to macrophotogrphy. And with the                       :
addition of either the normal or the automatic K                                                                                                                          l
extension rings, a complete range from the                 :,
closestof close-upwork with all lensesright up    #t.
to macrophotography is possible. The lensescan   .l;iii;
also be attached to the front plate in reverse,so     ,;;;i
there is no need for the reverseadaptor K-52mm                                                                               :r':
or K-49mm. lt is also equipped with diaphragm   .11i.
automation by the double cable release.
M o r e o v e r , t o g e t h e r w i t h t h e S | i d e C o p i e r A , y o u
can also reproduce slidesand f ilm strips.                        ,
Note: When you use a Pentax A lens, set the
aperture ring at each f-number and do not set it
at the "A"  (Auto) Position.     :::'-:1:::':,.:.:::


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Suitable Cameras              Pentax 35mm bayonet-mount cameras
Suitable Lenses           SMC Pentax, SMC Pentax-Mand SMC Pentax-A lenses.
Bellows Extension           N O R M A L       38 - 170mm.
   (Distancefrom the          (Lensesmounted in the normal way)
   lens mount to the       REVERSE      56 - 174mm.
   body mount)                 (For 50mm f/1.7 lensesmounted in the reversedirection)
Automatic Diaphragm          Automatic diaphragm closed by double cable release.
Size                         Width 97 x height 131 x length 207mm (Auto Beilows onty)
                              With 158 x height 135 x tength 298mm (With Stide Copier)
Weigfrt                        792g. (Auto Bellows only. scalesand double cable releaseincruded)
                              256g. (Slide Copier only)
Accessories                   Double cable release.scale

HOWTO OPERATETHE AUTO BELLOWSA UNIT

W r t l rt l r e I e r r sN o r r n a l l yM o L r n l e r l                     3. Now connect the camera to the bellows unit by
1. Loosenthe clamp screwon the right side of        attaching the bellows-to-cameramounting ring to the
the rear standardand remove the bellows-to-camera  rear standard of the bellows. lf the camera is to be
mountrng nng.                                used in the horizontalposition,align the upper edge
                                                            of the rear standard with the front edge of the
2. Remove the lens from the Pentax camera and      pentaprism housing of the camera,and tighten the
attach the bellows-to-cameramounting ring to the     clamp screw.
lens mount of the camerain placeof the lens.





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4.   lf the camera is to be used in the vertical           5. Attach the lens to the bellows-to-lensmounting
position, rotate the camera so that the shutter         ring located on the f ront standard.To remove the
releasebutton is facing downward. Align the side     lensagain.depressthe lens lock button, and turn the
edgeof the camera with the upper edge of the rear    lens 65o counterclockwise.Note that this lock
standardand then tighten the clamp screw.          button does not operate in the same way as the
                                                   lens lock releaselever on the camera.

Ext
indicators





              One side of the scaleis marked NORMAL, while the
                   other is marked REVERSE. The scaleabove shows
                   the NORMAL side,and it is mounted on the two
                   pins at the upper side of the rear standard.The scale
                         is kept in position by magnets.The extension
                    (length) of the bellows is indicated on the top of the
                     front standard.

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Loosenthe f ront standardclamp screw and turn the   The bellows can also be adjusted by loosening the
front standardextension knob to adjust the            rear standard clamp screw and turning the rear
extension of the bellows. After focusit'lg,always      standard extension knob. Be sure to retighten the
rememberto retightenthe clamp screw.             clamp screw after focusing.

The tripod block can be freely moved back and      To attach the cable release,screw the unmarked end
forth the monorail by turning the tripod block         of the cable into the cable releasesocket on the
shift knob after the tripod block clamp has been     camera and the end with the red ring into bellows
released,allowing free movement of the auto bellows cable releasesocket iust below the front standard.
assemblywhen mounted on a tripod. Be sure to
retighten the clamp knob after adjustment.





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Cable ReleaseCheck                                   further or the shutter releasecable tip to extend
 The double cable releaseis designedso that the               I ess.
 lens stops down well before the shutter releases.      In the casethat the shutter does not fire, adjust
 With some cameras,however, adjustment may be     cable tips reverselyas describedabove.
 required before the shutter wiil be released.Before       It is advisablewhen you use the Super A, Super
 you take pictures,check if the cable release         Program,Program A or Programplus which has
 adjustment is properly done. First, screw the cable    an electro-magneticshutter releasebutton, adjust
 with the red ringed tip antothe cable releasesocket   the cable releasetip to extend less.
as describedon page l0 and set the diaphragm of the
 lens to its smallestaperture.check if the aperture
diaphragmstops down to the smallestopenings as
you pressthe double cable releaseplunger.
secondly, screw the other cable into the camera
shutter releasebutton and pressthe plunger
againto see if the lens aperturestops down fully
before the shutter f ires.
lf the shutter f ires before the aperture stops down,
adjust either the red ringed cable tip to extend

For T (time) exposures,set the shutter speed to B
and depressthe cable releaseplunger to open the
shutter. To keep the shutter open for the duration
of the exposure,tighten the lock screw at the side
of the cable release.When the exposuretime is up,
close the shutter by looseningthe lock screw.





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The auto bellowsassemblyshould be mou nted on
 a sturdy tripod at least3.Skg. (7 lbs.) in weight and
with very f irm interlockingparts. The assembly
shouldbe positionedso that the majority of the
weight leansslightly toward the lens side.while
mounting the assemblyat its center of gravity
appearsto be more stable,there is actually greater
tendencytoward camera "shake" with the assembly
centeredon the tripod. Best resultsare obtained if
balanceleansslightly on the lens side.

MOUNTINGTHE LENSIN REVERSE

Mount   t h e   l e n s  i n  r e v e r s e o n ly fo r ma g n ifica tio n s      2. Loosen the bellows clamp screw and separate
g reat er t h a n 1 X .                                        the bellows from the front standard.
1. Remove the stopper screw at the end of the        3. Loosen the f ront standardclamp knob and
   monor a i l .                                     remove the lens and front standardfrom the
                                                    monorail.





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4. Wh e n u s i n g a 4 9 m m   f i l t e r s i ze le n s, re ve rse th e        Tu rn  th e lens and  fr ont   f r am e in the  r ever se
       f ro n t s t an d a r d a n d  t h e n  r e mo ve th e a d a p to r b y         d i r e c t i o n , a n d  r e i n s e r t o n t o  t h e m o n o r a i l .
    ro t a t t ng  i t c o u n t e r c l o c k w i s e .

5. S c rew t h e a d a p t o r   i n t o  t h e  f ro n t   f ra me o f th e
      t e n s .

7. Attach the front of the bellows to
   the f ront frame of the lens,
   tighten the belows clamp screw.
  52mm threads are found inside
   the ring at the rear side of the
   front panel.This ring is used for
   attachinga 52 mm screw-infilter,
  52mm lens hood, etc.





                                                 Turn the scaleover to the REVERSE side and
                                               mount  it over the rear and f ront standards
                                                    as before.

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i F O C U S I N G

              T h e d i a p h r a g m  r e m a i n s o p e n n o m a t t e r w h a t
               a p e r t u r e  i s s e l e c t e d . S o   i t   i s p o s s i b l e t o  f o c u s  i n  t h e
            same way as any ordinary Pentax camera. To focus
               the camera, move either the front standard or rear
                 s t a n d a r d e x t e n s i o n k n o b s o r  t h e s h i f t k n o b , w h i l e
                                      l o o k i n g  t h r o u g h  t h e v i e w f i n d e r . W h a t  f o c u s i n g
          m e t h o d  s h o u l d b e u s e d d e p e n d s o n m a g n i f i c a t i o n s .
             T h e c h o i c e o f  t h e  f o c u s i n g m e t h o d s d e p e n d s o n  t h e
               p h o t o g r a p h i n g m a g n i f i c a t i o n . W h e n  t h e
          m a g n i f i c a t i o n  i s r e l a t i v e l y  l o w , a d j u s t  t h e  f r o n t
                s t a n d a r d e x t e n s i o n . A s  t h e m a g n i f i c a t i o n . g e t s h i g h e r ,
                     it's best to use the rear standard and the tripod
               b l o c k s h i f t m o v e m e n t s .
                                     l f  t h e   i m a g e m a g n i f i c a t i o n  i s h i g h e r t h a n y o u
               d e s i r e d , s h o r t e n  t h e b e l l o w s e x t e n s i o n a n d   i f  t h e
          m a g n i f i c a t i o n   i s  l o w e r  t h a n y o u e x p e c t e d , e x t e n d
                             t h e b e l l o w s .


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Dep$-of-Field
The closer the lens is to the subject, the shallower
the depth-of-field becomes.Even for minimum
aperturesof tl22for standardlensesandll32tor
SMC Pentax Macro 50 and 100mm lenses,you
may still not be able to get the desired depth'of-
field. Therefore, be very careful in your focusing.
For close-ups,the focus plane lies right in the
center of the depth-of-field.So the best focusing
of the area between the closestand farthest limits                                    Closest
of the depth-of-field is achievedby focusing for                                   Focusingposition
                                                                                 Farthesta position exactly mid-way between the two planes.     I




                                                                    x Depth-of-Field

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EXPOSURE                                                                                                                                                                                                                                                                                                  I
                                                                                                                                                                                               I

 E xposu re                                      exposureswith camerasother than the Pentax LX,
The automatic diaphragm of the lens is operated by   cover the viewf inder eyepieceto prevent stray light
the double cable releasewhen the auto bellows is     from adverselyaffecting the exposure.
used.Although it is convenient to leavethe
diaphragm opened for focusing, exposure reading
must be made with the diaphragm stopped down to
shooting aperture. Exposurescan still be made on
automatic with camerasfeaturing automatic
exposure,but the diaphragm must be stopped down
for exposure readings.To close the diaphragm,
first set the desiredaperture on the lens,then push
in either of the knurled ringsshown in the
illustration and rotate clockwise. Af ter setting the
camera for the proper exposure,make the exposure
by pressingthe plunger of the double cable release.
To reopenthe diaphragm,turn the knurled ring
counterclockwise.CAUTI ON : When making

Outside the Exposure Meter Range                   Reciprocity Failure of Color Films
When the subject is too dark and the exposure       For long exposuresof over 1 sec.and especiallyover
lies outsidethe meteringrangeat the particular      10 sec.with a color film, reciprocityfailure will
aperture you wish to use, f irst open the diaphragm   causean under exposure.Therefore, the exposure
until a readingcan be made. For example, if you      time must be compensated.Also, with most color
want to use f/l 1, but the best possiblereading is f/4   reversalf ilms, the same phenomenon causesa color
at112 sec.,change the shutter speed by the same      shift in color reproduction if the exposure time
number of stops as the diaphragm is closed down to   exceeds1/10 sec.
the desiredaperture. That is, f 14tof 111 is 3 stops,  Such a color shift can be compensatedby using CC
so changethe speed by 3 stops also - from 1 l2sec.    filters (Color Compensationfilters). Refer to the
to 4 sec.                                    Kodak Color Data Guide or instruction of each f ilm.


      F          't.4    2  2.A    4   5.6      I   11 16  22   32
 !1oos,ure,I rme ( sec)  1/1s   1/8  1/4   1/2   1    2   4  a   16   32



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Larger Than Life Size                              roughly divided into those for up to life size
 When the lens-to-filmdistanceof any lens is twice     (pp. 33 - 41) and those for largerthan tife
 the focal length of the lens,as shown in Fig. 2 on         ( p p . 4 3 -  5 1 ) .
 the next page,the photographic magnification will
 be 1X (life size). The bellows of the Auto Bellows
 A unit can be extended from 3gmm to 170mm {the
 distancefrom the bellows-to-lensmount to the
 plane where the bellows-to-cameramounting ring
meets the lens mount of the camera).So any lens of
 focal length under 150mm can be used to
photograph larger than life.
 Figs. 1 to 3 refer to the Macro SOmm lens.The lens
has been designedfor focusing with ,,a,, larger
than "b" which is the casefor ordinary photography
as in Fig. 1. So it is only naturalthat optimum
sharpnesswhen photographing largerthan life size,
as in Fig. 3, is achievedwith the lens reversed.The
close-uptables between pages33 and 51 have been

Usingthe Screw-Mount Takumar Lenses
Takumar screw-mount lensescan be attached to the
Auto BellowsA unit with the aid of the mount
adaptor K.
 First screw the mount adaptor into the rear of the
Takumar screw-mount lens. Line up the red dot on
the adaptor with the red dot on the bellows-to-lens
mount. Insert the lens and rotate it clockwise 65o
to lock it into position.
The lens and mount adaptor are removed from the
bellows unit in the same way as with the Pentax
Bayonet Mount cameras.
Focusingand exposure measurementsare also the
sameas for ordinary cameras.

How to Read the Close-Up Tables               When Starting with Magnification
These tables may be used in three different        When you want to photograph a subject of
ways, depending on whether you start with the       a certain size so that the image will be a particular
magnification, picture area, or the f ilm-to-subject     size on the f ilm, start by determining the
d istance.                                 magnif ication.
                                                 For example, if you want to take a photograph of
                                                  a subject 40mm in size so that its size on the f ilm
                                                                 will be 32mm, when using a 50mm  f 11.7lens,
                                                    the magnification will be 32140 = 0.8. Table 1
                                           shows that the bellows in this caseshould be
                                              extended to somewhere in between 4O and 50mm.
                                            To  f ind the exact extension, use the simple
                                               mathematical formula given here. On page 26 for
                                               example, "a"  is the distance between the subiect
                                             and the first nodal point in the lens (the point
                                            where light enters the lens and crossesthe
                                                       principal oXis), "6"  is the distance from the second
                                               nodal point (the point at which light crossingthe
                                                   axis leavesthe lens)to the film plane, "f"  is the
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