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Pentax Spotmatic - contains more pages/info on lenses User manual

User manual for Pentax Spotmatic - contains more pages/info on lenses. 47 pages in English. Read the original PDF, download or print a copy without registration.

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Brand
Pentax
Model / document
Pentax Spotmatic - contains more pages/info on lenses
Document type
User manual
Language
English
Pages
47
File size
14.5 MB
Category
Lenses & filters
Document date
Not specified in catalog

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Page 2 · Read text
Major working parts of the



A -  Shutter speed index
 B - Shutter speed dial
 C - Rapid wind lever
 D  ASA film speed setting   -
 E -  Shutter release
 F - Automatic reset exposure counter
G          indicator  -'Cocked'                                                              i
H - D-ring lug
 I   Self-timer cocking lever   -
 J - Focusing ring
K-X  flash terminal
 L - FP flash terminal
M - Preview lever
N - Exposure meter switch
O   Film type reminder dial   -
P - Rewind knob
Q - Rewind crank
R   Film type index mark  -
S - Diaphragm ring
T - Diaphragm and distance index mark                                                                     I{
U -  Distance scale
V - Exposure counter index mark
W -  Depth-of-field guide


                                                     I
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Asahi Pentax Spotmatic


   When the Asahi Pentax Spotmatic   exposed photographg without the use
    'vas introduced to the public at the   of external meters or the need for
    1,960 Photokina, the photographic  cumbersome, time-consuming calcu-
    world's fair in Cologne, Germany,    lations   !
      it attracted immediate and keen at-   The Spotmatic may also be set
    tention. Not available for purchase   manually the same as any other qual-
    at that time, it was a model of the   ity 35mm camera if special lighting
    advanced features and design that   or selective focus effects are desired.
    would be incorporated into cameras   Just leave the exposure meter switch
    of the future.                       in its OFF position and select the
     Four years of extensive research.   f/stop and speed settings for the re-
    exhaustive experiments and inten-   quired effect.
    sive testing followed before it be-    The traditional classic design and
   came available to serious amateur  simple elegance associated with
   and professional photographers  in   earlier models of the famous Asahi
     late 1964.                        Pentax have been retained in the
      With its unique behind-the-lens ex-  Spotmatic despite the incorporation
    posure meter of entirely new design,  of many highly advanced features.
    the Asahi Pentax Spotmatic is now   Meticulously constructed by master
   more than just another camera  . .  .  craftsmen, the Asahi Pentax cam-
      it is a new concept in photography.   eras remain the standard of excel-
     Hidden within the camera body,   lence and precision in the world of
    its through-the-lens meter utilizes  35mm single-lens-reflex cameras.
   two highly sensitive Cadmium Sul-    You will find the Asahi Pentax
    fide sensors to accurately measure  Spotmatic even more versatile than
     light seen by the camera's lens as  the famous Asahi Pentax SV. Its
      it is reflected from the subject be-  new 50mm f/1.4 and 55mm f/I.8
   ing photographed. Therefore, by  Super-Takumar lenses with com-
    measuring the light as it  passes   pletely automatic diaphragm will
    through the lens and matching the  satisfy the demands of even the
    exposure needle as seen through the  most critical professional. Like the
    viewfinder, you can be assured of  Sla and SV. the Asahi Pentax
    properly exposed pictures under all  Spotmatic has a 42mm threaded lens
   but the most impossible lighting  mount that accepts any of the
    conditions. Macro-or microphotog-   superb Takumar lenses from the
    raphy, pictures with telephoto lenses   ultra-wide-angle 18mm Takumar to
    or with filters .. . the Asahi Pentax  the super-telephoto 1000mm Taku-
    Spotmatic will give you correctly  mar.


2
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Page 6 · Read text
Specifications


Type
35mm single-lens reflex with built-in light
meter.
Film and Picture Size
35mm film (20 or 36 exposures). 24mm x 36mm.
Standard Lenses
Super -Takumar 50mm f/1.4 or .55mm   f /1.8
with fully automatic diaphragm. Filters and
lenshood size: 49mm. Equipped with diaphragm
preview lever which affords visual check of
depth of field. Distance scale: 45cm (18") to
 infinity.
Shutter
Focal plane shutter, with single non-rotating
dial. Speeds: B, 1-111000 sec. Film speed
(ASA) setting dial and window on shutter
speed dial. Built-in self-timer releases shut-
ter in 5-13 seconds. Shutter curtains of soe-
cial rubberized silk   .
Warning Signal
The index of shutter speeds turns to red when
the shutter and film speed settings are off the
meter's measurability range. Refer to page 15.
Finder
Pentaprism finder with microprism Fresnel
lens for instant focusing; 0.88x magnification
with 50mm lens and approximately life-size
with 55mm lens.
Focusing
'furn the distance scale ring until the subject
image on the ground glass comes into focus.
Reflex Mirror
lnstant return type with special shock absorb-
ers for minimum vibration.
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 Film Advance                     I   r.*-.--. Ratchet-type rapid wind lever (for film ad-
 vance and shutter cocking). 10" pre-advanc-
 ing and 160" advancing angle.
"Gocked" lndicator
A red disk appears in a small window along-
side the shutter release button when the shut-
 ter is cocked, and blacks out when it is released.
Film Exposure Gounter
Automatic re-set type.
Lens Mount
42mm threaded lens mount.
Flash Synchronization
Equipped with FP and X flash terminals.
Electronic synchronization at 1/60 sec.
Exposure Meter
Built-in meter measures the brightness of the
ground glass, and couples directly to shutter
and film speed settings. Film speed (ASA)
setting ranges from 20 to 1600 (LV1-18 for
ASA-100 film with standard lens.) Meter
is powered with a mercury battery.
Film Rewind
Rapid rewind crank for speedy film take-up.
Film rewind release button on bottom of cam-
era body rotates while film is being rewound.Loaded Film Indicator                     .,!Loaded film reminder dial underneath film                            rooo?9!
rewind knob is marked "PANCHRO" (black-                          SF:3
and-white). "COLOR" and "EMPTY."
Dimension
Width 5.6/ (143mm) x height 3.6" (92mm)  x
thickness 3.4'l (88mm).
Weight
868 grams (1 lb. 14 oz.) with standard lens.
Body alone: 621 grams (1 lb. 6 oz.)

                                                          5
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TURN ON LIGHT METER SWITCH.
Push up the switch button with your
thumb. and the small window on the
 switch button will turn to red indicating
rhat the meter is switched on. Through
 the viewfinder, you will observe the move-
ment of the meter's needle on the right
side of the ground glass. Be sure to
turn off the meter's switch when not
 actually taking readings.


ROTATE DIAPHRAGM RING.
The needle moves up and dorvn with the
turn of the diaphragrn ring. When the
needle restr; at the centre, you rvill get
correct exposure.  If the needle does not
come to the centre no matter how far
you turn the diaphragm ring, change the
shutter speed. When the needle is off
centre and close to the ( 1-) mark, you
will get over-exposure: change the shut-
ter speed to a faster setting. If  the
needle is closer to the (-)  mark, you
will get under'exposure: change the shut-
ter speed to a slower setting.

RELEASE SHUTTER.
Hold your camera firmly and trip the
shutter. When the shutter is released.
the meter switch will automatically turn
off, and the needle will remain fixed off
and underneath the centre. The dia-
phragm will reopen to its full aperture
and the overall image will look brighter.
Cock the rapicl wind lever for the next
picture. (When taking a series of pic:
tures under the s:rme lighting conditions,
it is not necessary to repeat instructions
4 and 5.)

                                                         7
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How to hold you r camera


                                                              t  3e
  *d           IP"J


      In horlzontal position A, Hold   In vertical  position B.  Hold   In vertical  position G. Hold
     the camera firmly with your   your camera tightly to your fore-   your camera tightly to your fore-
       left hand, and draw your arm   head with your left hand, and  head with your left hand, raise
      close to your body.           draw your right arm close to  your right arm and draw your
                                  your body.                              left arm to your body.



                                       which are not sharp are due to move-
                                      ment of the camera. When you focus
                                    with the camera held horizontally
                                           (Position A), hold the lens barrel as
                                              illustrated in photograph. Put the
                                      camera on your left hand thumb and
                                                            little finger. Turn the distance scale
                                     ring with your thumb and index
                                        finger. When holding the camera
                                               vertically, some people release the
                                             shutter with the thumb (Position B),
                                       while others release it with the in-
                                   dex finger (Position C). Position C
    As a general rule, your camera should    is more desirable for fast focusing
    be held more firmly by the left hand   and shooting. With the Asahi Pen-
    which does not release the shutter.    tax, whether held vertically or hori-
     If you hold your camera with the    zontally, you see your subject image
     right hand-the hand which releases   through the taking lens, enabling
    the shutter    it may cause camera  you to compose, focus and shoot                -   movement.             Very often, pictures   with a minimum of time and effort.

8
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                       Film loading
                                      f,         Avoid direct sunlight when loading your
                          4!,/ts-t"'bl                        film.
                               1 Open the back by pulling out the re-                   -tEa                                   wind knob untilback cover snaps open.
                              2Place the film cassette into the cas-
                                          sette chamber, and push back the re-
                                 wind knob. Draw out the film leader
                                  and crease across one or two perfora-  €-Gr.r        tions back from the end of the leader.
                                     Insert the creased portion into slot
                                     of the take-up spool.
                              J Advance the film by alternately turn-
                                      ing the rapid rvind lever and releasing
                                       the shutter until both sprockets have
                                        properly engaged the film perforations.        r*ffiH'E           Close the back by pressing it firmly.
                         4 If the film is properly loaded, the re-
                                 wind knob will turn counter-clockwise
                            when you advance the film by turn-
                                  ing the rapid wind lever.

 Film type reminder dial     Setting ASA film speed
                                 The ASA film
                                                        speed rating of all
                                35mm films is
                                                      given in the data
                                                           sheet packed with
                                                  each roll of film.
                                   The higher the
                                      ASA number, the
                                                   more sensitive the
                                                               film. Lift the out-
Use the film type dial to show what      er ring of the shutter speed dial and
type of film is in your camera. Sim-      rotate it until the ASA number of
ply turn the dial so that the type of     your film is opposite the red index
film in the camera is opposite the A     mark.
mark. To check whether the cam-    Be sure to set your film speed on
era is loaded, turn the film rewind     the shutter speed dial because the
knob clockwise. If it turns freely,      dial is connected to the exposure
the camera is not loaded.             meter system.
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Film wind and rewind
                                      knob automatically turns coun-
                                                  ter-clockwise, indicating that the
                                               film is moving from cassette to
                                             take-up spool. Trip the shutter.
                                  Cock the rapid wind lever for
                                        the first picture; the exposure
                                         counter automatically turns to
                                                                            '1', indicating that the first pic
                                             ture is ready to be taken.
                              $ After the final picture on the
                                                             roll t20 or 36 exposures) has been
                                             taken, the rapid wind lever will
                                                 not turn all the way as you stroke
                                                           it. This indicates that the final
                                               picture has been taken on your
                                                  film, and that the film must be
                                     rewound. DON'T open the back
                                      of the camera, or all exposed
                                        frames will be ruined.
                          4 Unfota the film rewind crank.
                          $ Depress the film rewind release
                                          button. Turn the rewind crank
                                                   to rewind the film into the film
                                                cassette. The film rewind crank
                                           permits rewinding at a smooth,
                                          even rate.  ( Under some atmos-
                                             pheric conditions, erratic or too
                                                rapid rewinding willcause static
                                                   electricity marks on the film.  )
                                  You will feel the tension on the
                          www.butkus.us          rewind crank lessen as the leader
       Before turning the rapid wind       end of the film slips off the take-                                    up spool.          lever, slowly turn the film rewind
      knob clockwise until a slight        Stop rewinding when you feel                                             this happen. AVOID DIRECT        resistance is felt. This prevents                                SUNLIGHT WHEN UNLOAD.        loosening or warping of the film.                                    ING YOUR FILM. (The rewind
       The first portions of the film can-       release button will return to
        not be used for picture taking as       normal position as you load your
       they have already been exposed      next film and turn the rapid
          to light. Generally, two blank ex-      wind lever.)
        posures should be made before   6 Putt out the film rewind knob
        taking your first picture. Cock       (the back will open automati-
         the rapid wind lever until it stops.         cally), and remove the film cas-
       Watch to see that the film rewind         sette.

10
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              Bright field focusing
                                   I You can start viewing and focusing
                                before and after cocking the rapid
                            wind lever. When the preview lever
                                    is in "AUTO" (automatic) position,
                          and the meter is at "OFF", the dia-
                           phragm is fully open except for the
                         moment of exposure.
                                  I  Turn the distance scale ring until
                                 your subject image is clearly in focus.
                                            It is not always necessary for you to
                           view and focus with the diaphragm
                                    fully open. In bright sunlight, you
                        can easily focus with diaphragm
                               closed to   f /5.6 or  f /8 and .still ob-                              serve the depth of field. It is easi-
                                  er, however, to focus with the dia-
                         phragm fully open as your subject
                           image is much brighter.
                         When the letters "MAN" appears
                                  beside the lever. the lens is in manual
                                  position; when "AUTO" appears,  it
                                     is in automatic position.
                      Microprism
                              Asahi Pentax cameras have a Fresnel
                                  lens with a microprism centre under-
                              neath the ground glass. As you look
                               through the finder, you will see that
                           the Fresnel lens consists of many
                               concentric rings which provide the
                              brightest possible image on the
                           ground glass.
                         The microprism  is the centre por-
                              tion of this diagram. When your  @                    subject is in focus, the image in the
                             microprism will be sharp and per-
                                  fectly clear. If your subject is not
                                in focus, the microprism will break
                             the image up into many small dots,
                      much like engraver's screen. You
                          can focus your subject on any por-
.ir                             tion of the ground glass.

                                                        11
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Automatic diaphragffi

                             When the preview lever is in "AU-
                          TO" (automatic) position, and the
                                       exposure meter is turned to "OFF",
                                      the fully automatic diaphragm  is at
                                                   its largest aperture at all times, ex-
                                        cept for the instant clf exposure, no
                                      matter rvhat aperture is set on the
                                      diaphragm ring. When you release
                                           the shutter, the diaphragm automat-
                                              ically stops down to the predeter-
                                   mined aperture and the shutter cur-
                                               tains start traveling instantly. When
                                     the exposure is completed, the dia-
                                 phragm reopens to maximum aper-
                                     ture completely automatically and
                                   you are ready to compose, focus and
                                           shoot your next pictures.  If you wish
                                                to visually check exact depth-of-field
                                             before making the exposure move, the
                                                                                                  ,l    preview lever to "MAN" (manual)
              OUT OF FOCUS      position. This stops the diaphragm
                                         to the aperture selected and shows
                                     you exactly how much depth-of-field
                                                    will appear in your picture. The pre-
                                  view lever may be moved back to
                               "AUTO" (automatic) position before
                                          or after making your exposure, or, if
                                 you are making pictures in bright
                                              sunlight, it may be left in manual
                                              position, which permits a constant
                                      check of depth of field.

                              *When the exPosure meter switch ts
                                            turned to the "on" positiort, the lens
                                     diaphragm changes from the auto-
                                              matic to manual position euen though
                                            the preuiew leuer is in the " AU TO"
                                             (automatic) fositiott. When the shut-
                                             ter is released, the lens diaPhragm
                                                will automatically return to its au-
                                                          I       tomatic position if the leuer is sel
                       IN FOCUS     on "AUTO".

L2
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                             Shutter
Turn the shutter speed dial clock-   speed may be set either before or
wise or counter-clockwise to the   after cocking the rapid wind lever.
shutter speed desired. The shutter  As you cock the shutter by turning
                                   the rapid wind lever, the "cocked"
                                        indicator turns to red showing that
                                     the shutter is cocked.
                             The indicator window blacks out
                                      as you trip the shutter button. For
                                   use of the X setting on the shutter
                                   speed dial, refer to page 18.
                                  With the shutter speed dial set on
                         B (bulb), the shutter will stay open
                                as long as you depress the shutter
                                     button. As you release your finger
                                  from the shutter button, the shutter
                                      closes. When a long exposure  is
                                    desired while using the B setting,
                                       attach a shutter release cable with a
                                        Iocking device to the shutter button.
                                    This will permit a "Time" exposure.
                  Gautions
  At slow speeds-slower than 1/30  2 to protect the shutter mechan-
     support your camera rigidly or      ism, trip the shutter release be-  -use a tripod to prevent movement       fore putting the camera out of
  of your camera.                    use for any extended period.

                      Depth-of-field guide
                                       the range on the distance scale ring
                                   covered within the figure 8 on the
                                       depth-of-field guide indicates the
If you want to know how great the   area in focus at the lens opening.
depth of field is at a certain aper-   You will note from the depth-of-field
ture, look at the depth-of-field guide.   guide in the photograph that the
In the above photograph, the distance   range from approximately 10 to 25
scale is set at 15 feet  . . . the lens is    feet is in focus. Note that as the lens
focused on a subject 15 feet away.    apertures change, the effective depth
The calibrations on each side of the    of field also changes. For the depth
distance index correspond to the   of fields at different apertures and
diaphragm setting and indicate the    distances, refer to page 14-15.
range of in-focus distance for differ-                                                             f  Depth of field is the range betuteen the         Ient lens apertures. For examPle, if     I  nearest and farthest distances uthr'ch     I
the lens opening of  f /8 is to be used,     I  are in focus at different lens apertures. J

                                                         13
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Non mercury batteries are available       www.butkus.us
from on-line stores.
                      Mercury battery
      tr
                                               -*.n ,f   il



                         How to check it
                                1. Set the shutter speed dial to B
                                           (bulb) position.
                                2. Turn the ASA dial to ASA 100.
                                3. Push the meter switch to "on"
                                                     position.
                                 Look at the meter's needle through
                                    the viewfinder. If the needle rapidly
                                           drops, the meter battery has sufficient
                                        capacity; if it does not, replace the
                                  mercury battery.
                         How to replace it
                                Open the battery housing cover on the
                                   bottom cover plate with a coin. $e-
                                move old battery and insert new bat-
                                        tery with 11) side toward the top of
                               the camera. For replacement, use
                                      Mallory PX 400 or RM-400-R or equiv-
                                                 alent.
                  6n6*            CAUTION: The mercury battery is                                          like a phonograph record. It can be
                                 damaged by skin acids. Handle by the
                                    edges with a dry cloth only. Be sure
                                      the battery is cleaned with the cloth
                                          before insertion into the camera. The
                                      battery is not rechargeable.
     l).1 .\'(;llll!  A seriotts accident lnsbeen reportt'dof asmallchilduhohasputarnercury
    battery into his moutlt and has becn hospitalized for scrious gripes and stomach inflamma-
   tion. Please alutays kccp a ,nercury battery from thc rcach of small children.

                                                           L7
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                    Infra-red photography


                          5Omm
                                          t/t.4


    If you intend to take infra-red photographs, remember to use the small "R"
   index marked on the depth-of-field guide. Some of the Takumar lenses,
  however, like the above picture of Super-Takumar S0mm f/l.4, do not
  have the "R" mark. The index is just a short orange line.
   First, focus your lens on your subject. Determine the lens to subject
   distance from the distance scale. Then match your lens to subject dis-
   tance to the "R" mark by turning the distance scale accordingly. For
   instance, if your subject is in focus at infinity, turn the distance ring
  and move the infinity (-) mark to the "R" index.
  The "R" index marking on the Takumar lenses is based on the lens
   setting at infinity.  They have started to make IR film again.

 How to make deliberate double exposure

 a.i@€nd
For deliberate double exposures, make the first exposure in the normal way.
Then tighten the film by turning the rewind knob O, and keep hold of the
rewind knob. Depress the film rewind release button @ and cock the rapid
wind lever. This tensions the shutter without advancing the film. Finally,
release the shutter to make the second exposure. Then make one blank
exposure, before taking the next picture, to avoid overlapping.

                                                         19
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lmportant notes



                 A spare mercury battery for the light
                            meter is in the small pocket located
                               in the inside upper portion of the
                           camera case.


                              Always keep the meter switched off when
                                not actually taking readings. Leaving the
                               meter switched on will rapidly exhaust the
                                  battery. It is also necessary to keep the
                               meter switched off when mounting a
                                Super-Takumar lens on the Spotmatic
                              camera body. If  it is switched on, the tip
                                  of the automatic diaphragm release pin of
                                  the lens will hit the pin release plate inside
                                  the camera body and it may get damaged.
   www.butkus.us

                      When removing the Super-Takumar
                      50mm f/1.4 lens frorn the camera
                               body, do not place it on its
                              threaded end without the rear
                         mount cap in place, or you will
                               scratch its rear element lens.


                      When the index of the shutter speeds
                              turns to red, it indicates that the
                                shutter and film speed settings are
                                  off the meter's measurability range.
                          Change the shutter speed setting
                              to a faster or slower setting.
                               Refer to page 16.


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                      When the meter is switched on, the          5    lens (any Super-Takumar lens) is
                               in its manual position even when the
                           diaphragm preview lever is in "AUTO"
                              (automatic) position. When the
                          meter is switched off manually, or
                              automatically after shutter release, the
                               lens returns to its automatic  position
                      when it is set in "AUTO" position.
         Exposure  6
             factor
                        Exposure increase factors which applyll                 -I           rt--l   n-1r-
            x1.e6            close-ups, macro- and micro-photos,IIIATIILr!               when taking pictures with filters,
            x3.2O         do not apply to the Spotmatic.
            x4.80
            x5.46

                            Super-Takumar 50mm f/1.4 lens          7  The                             is made for use with the Spotmatic.
                                It can be used with only two other
                        cameras: the Asahi Pentax SV and Sla
                        with an orange-coloured "R" marking
                    on the film rewind knob. Use with
                      any other camera will damage the
                           rear element of the lens.

                   The length of the tripod's screw         8                         should not exceed the normal length
                         of 3/16' (4.5mm). Do not extend it
                         longer than this length when
                       mounting your camera on tripod.
                         Forcing longer screws into the tripod
                          socket of the camera will damage
                        the mechanism.
          9
                We do not guarantee the quality of
                         photographs when brands other than
                     Takumar lenses and Honeywell or No!            Asahi Pentax accessories, such as
                           lens extenders, are used.


                                                       2L
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How to take care of your camera

   1. STORAGE
    a) The instrument, when not in use, should be protected from damp-
     ness and dust. Preferably,  it should be kept in its case and, as an addi-
      tional precaution, inserted into a polyethylene bag.
    b) Care should be taken to see that the camera is not kept in abnor-
     mally high or low temperatures - normal room temperature is best.
    c) Take the precaution of removing any batteries since, no matter how
     well made these may be, there is always a risk of deterioration and
      corrosion.
   2. EXERCISE
      All mechanical instruments need to be exercised regularly to keep them
     in good condition. Cameras are no exception to this rule. If you put
     your car in storage for the winter, the first thing a prudent owner does
     in the spring is to have it serviced before putting it back on the road.
     There is not quite the same parallel between a motor c?r zrrd a camera,
      nevertheless, you should store your camera where you can get at it easily
     and put it through its normal operations at least once per montr^. i.e.
    a) Set the shutter release and fire.
    b) Turn to a slow shutter speed and again set the shutter release and
      fire. Also operate delayed action device (self-timer).
     c) Examine the exposure meter for correct operation.
    d) Check film transport.
    e) Check the range finder or pentaprism viewfinder.
     These actions will keep the mechanism in good order, retaining the
      natural qualities of the lubricant-thus ensuring the camera is ready for
      instant use when required.

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3. RUNNING TEST BEFORE USE
 Before embarking on a holiday where your camera will be your constant
 companion or, in fact, any other reason for the camera being required
on an important assignment, make a few trial exposures. It is advis-
 able to test the camera at least four weeks prior to your departure to
 give time for a test film to be exposed and processed. Many spoiled
 holiday records would have been avoided if this precaution had been
 taken.

4. DUSTY CONDITIONS
When your camera is used on the beach, or other conditions where dust
or sand can easily infiltrate the mechanism, take the precaution of put-
ting the instrument with its case into a polyethylene bag or other con-
tainer so that flying dust or sand are prevented from entering the cam-
era. This applies particularly, of course, if it is laid down on a sandy
beach. Furthermore, avoid leaving the camera in such a position that
direct sunlight is allowed to fall upon it for a long length of time.
5. LOOSE PIECES OF FILM
This nuisance is often the cause of trouble with a camera. Small chips
of film can easily damage the mechanism. Therefore, check your cam-
era every time it is loaded. Always make sure it is free from small
pieces of film.
6. TREATING YOUR CAMERA TENDERLY
Your camera is a fine, precision instrument. It has been produced with
great care and attention to detail. Do not allow it to be swung by its
shoulder strap, thrown into the back of a car, or in any other way
treated as if it were as robust as a battleship. If you protect the cam-
era against possible damage due to a knock, you will be amply repaid
by years of excellent and trouble-free service.
                                                               -- 23
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Interchangeable Lenses
   The Asahi Pentax offers many interchangeable lenses in a wide variety of
    focal lengths, all of which are highly respected by both professional and
   amateur photographers for their fine resolution. The photographic cover-
   age of the various Takumar lenses is illustrated on page 25. With focal
    length lcinger than 55mm, the subject image is seen through the viewfinder
    larger than its Iifesize.
    Regardless of the lens selected for your Asahi Pentax, there is never need for
   an accessory viewfinder, ordinarily required for rangefinder type cameras.
  When interchanging lenses, hold the lens by the distance scale ring. When
   attaching a lens, filter, or lenshood, do not screw it too tightly, as you
   may find it difficult to remove.
  Fixed Focusing Setting
   Because of the considerable depth of field of wide-angle lenses, you can
   use them as fixed focus lens if the diaphragm and distance scales are set
   properly. For your convenience, the Super-Takumar  lenses shown on pages
   26-27 have a fixed focus mark. Just align with the index the orange-
   coloured figures of the diaphragm and distance scales, and the lens will
   be in fixed focus from foreground to infinity. You'li find this extremely
   convenient for fast shooting.
  Resolving Power of Takumar Lenses
   Resolving power of all Takumar lenses is factory-tested by skilled optical
   engineers. There are three types of tests: microscopic aerial test, projec-
    tion test and photographed film test. Resolving power of a lens shown by
   lpm (lines per mm) varies depending upon the method of resolution test.
   Takumar lenses have been tested for resolving power to conform to Asahi
    Optical Company standards which are higher than those set by JIS Uapan
    Industrial Standards). All Takumar lenses bear the seal of the Japan Cam-
    era Inspection Institute which insures the highest standards of performance.
  When testing your lens performance.  .  .
   Use a slow-speed fine grain film. Generally, high speed films are grainy                    n,
   and are not suitable for resolution test. Support your camera on a good                      I    tripod. Use a shutter release cable to prevent camera movement. 'fhe
    definition of the picture on the negative film may decrease if exposure
   and developing time are not proper. Time your exposure and devetopment
    correctly,
     If you do your own developing and enlarging, see that your enlarger uses a fine
    quality enlarger lens. If it is not of a fine quality, your pictures can never be
   sharp no matter what superb lenses are mounted on your camera. Usually,
   the diaphragm of the enlarger lens should be closed down to f/8 or f/11.

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       DIFFERENCE OF ANGLE
               OF
       TAKUMAR LENSES





     3UUMM           5OOmm           lOOomm


(All photographs were iaken from the same location and distance from the subject )

                                                     25
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Super-Takumar Fish.Eye LTmm t/4
     The world's most efficient fish-eye lens with
     maximum brightness of tl4.  Covers an angle
      of vision of about 180". Enables you to view
      and focus through the viewfinder without keep-
      ing the reflex mirror flipped up.

      Lens element  ............... 11 (including 3 filters)
     Minimum aperture                ................  f.122
     Minimum distance               . 0.66 ft. (0.2 m)
      Angle of view..........           180' (diagonai)
     Weight                         7.98 ozs. (288 gr.)


    Super-Takumar 24mm  t /3.5
     The new Super-Takumar 24mm f/3.5 is an ultra-
      wide-angle lens that increases even further the
       versatility of your Asahi Pentax. Compact in
      size and light in weight,  it enables you to view
    and focus at an 84o angle of vision without
      keeping the reflex mirror flipped up. A wonder-
       ful lens to create pictures with dramatic impact.
      Lenselement...............              ............. 9
     Minimum aperture                ................ f/16
     Minimum distance               . 0.8 ft. (0.25 m)
      Angleof view.......                .................. 84"
    Weight                     8.71ozs. (2a7 gr.)

    Super-Takumar 28mm  t /3.5
   A new super-wide-angle  lens of 7 elements, de-
      signed and produced to meet the most exacting
       of the professional requirements, this is /fte lens
     you professionals and advanced amateurs need
      to shoot more artistic photographs. Equipped
      with fully automatic diaphragm; ideal for archi-                                                   www.butkus.us
       tecture, fast-action and artistic photography.

     Lens element...............              .............7
     Minimum aperture                 ................ f/16
    Minimum distance                   . 1.3 ft. (40 cm)
     Angle of view ......                  ................ 75"    Weight                          7.6 ozs. (218 gr.)  ffEm-l

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