Asahi Pentax Clip-on exposure meter User manual

How the Asqhl Pentox Gllp.Qn
 Exposure Meter wlll help you
 loke better plctur€s. . .



The best-planned picture can be ruined by poor
 exposure. Bracketing your exposures may give you
one usable negative or transparency out of four or
five, but it's a needless waste of film-needless
when you realize that an accurate exposure meter,
properly used, will help you to obtain consistently
good exposures under all but the most impossible
Iighting conditions.
  The new Asahi Pentax Clip-On Exposure Meter
is an accurate exposure meter, and it's easy to use
properly. It's extremely sensitive and highly selec-
tive. As its name implies, the Clip-On Meter simply
clips onto your Asahi Pentax S-1 or S-3 camera,
and couples directly to the shutter speed dial. It's
light, compact, and fits the Pentax like a glove.
Unlike a glove, however, this precision instrument
will help you take better pictures by showing you
the proper shutter speed and aperture to use in
order to correctly expose your film.
  In front of the Clip-On Meter's Cadmium Sulfide
cell is a lens which allows the meter to measure
light at a 40' angle; approximately the same angle
of view as most standard camera lenses. Because
of this correct angle system, your Clip-On Meter
will accurately measure exposure without being
affected by peripheral light which could cause a
false reading. You're assured of a perfect exposure
every time   !

Read the rest of this folder-then try the new
 Asahi Pentax Clip-On Meter on your S-1 or S-3.
 Once you use it, you'll agree that no other meter
 offers so much convenience and performance in
 such a compact, functional package  !
SPECIFICATIONS:
Weight : 4 ounces Angle of Measurement : 40"
Light-sensitive Eiement : Cadmium Sulfide
Size of Element : 7 x10 mm
Coupling System: Couples with shutter speed dial;
  gives reading for diaphragm setting
Film Speed Range: ASA 6-1600
Shutter Speed Range: B, l-1/1000 sec.
Diaphragm Range : tlL.A-f 122
Power Source: l.3v Mercury Battery
Moior Ports of lhe Asohi Penfax
Gllp-On Exposure Meter
  G
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A-Film speed colibrqtion                                        | -Low(redlightnumbersldiophrogm  colibrotion
                indexB-Film speed                    J -High(blocklishtnumbersldiophrogm  colibrolion                     diol          speedC-Shurter
D-Shutter rpeed index    K           scole                        -GuideE-"L'" switch setting     L           ring                           -SwitchF-"OFF" mortc        M         point                         -ZeroQ-"11" switch sefting     N                          -Needle
H-Swirch index       O -tlght input window

U-Mercury bottery replocement lever
                       P-Shutter speed coupling pin
                    Q-S, pport cover
                     R-Sfiae less

                                                                               v e r                    ? :i^"Jl.,:i' fl  ,',:',ilc o

HOW TO ATTACH THE CLIP-ON METER TO
YOUR CAMERA
Raise the support cover on the back of the meter
and slide the meter's legs into the grooves on your
camera's viewfinder frame. Lower the support
cover to lock meter to camera. Then, turn the
meter's shutter speed dial in either direction to
engage the coupling pin in the slot in the camera's
shutter speed dial. When the pin is engaged,
turning the meter's speed dial will also turn the
shutter speed dial of the Pentax.

phragm calibration with the needle by turning the
shutter speed dial. When the diaphragm calibration
 lines up with the needle, the shutter speed opposite
the Shutter Speed Index Mark is the proper one to
use. Always remember to use the black diaphragm
calibrations when the meter's switch is in the "H"
position and the red calibrations when the meter
i's set on the "L" positions.
   Always keep your meler swilched
          off when not in use !
Just as there are different ways of taking pictures,
there are different ways of using your Clip-On
Meter to determine proper exposure. Here are
several methods-
AT THE CAMERA POSTTION
For distant scenes, or when you do not want to
move in closer, point your meter slightly downward
to exclude excessive sky light which can inflate the
meter reading and cause you to underexpose non-
sky areas. Where shadow detail is important, open
up one full stop for black and white and negative
color film, and a half stop for reversal color film.
AT THE SUBJECT'S POSITION
For extremely critical exposures, move in close                                                                  tand take your reading directly from the subject.
Hold your meter about six or eight inches from
the subject (you may find it more convenient to
remove the meter from your camera), making
certain that no shadows are cast by your hand or
the meter on the areas being measured. This me-
thod is particularly effective for relatively small
main subject areas such as a person's face, set
against a much darker or lighter background, when
full exposure of the main subject only is important.

t
   SUBSTITUTE HAND METHOD
   When it is not practical to take a closeup reading,
     try a substitute reading by using the palm of your
   hand. Hold the meter six to eight inches away,
    being careful that no shadows are cast on the palm.
                                                                                                                                                                               Iq
   TAKE SEVERAL READINGS
     It is often best to take readings from different        t
    areas of your subject, using the average exposure
    to obtain detail in both light and dark picture areas.
   This is practical if no more than a six-stop differ-
   ence in high and low readings exists with black
   and white film, or a three:stop difference with
    color films. f?,puff,,€ ru )
  Gore of Your Glip-On Meter
  ZERO ADJUSTMENT
     If the meter's needle does not indicate the zero
   point when the switch is in the "OFF" position,
   turn the Zero Adjust Screw in either direction
    until the needle rests exactly on the zerb point.

   BATTERY REPLACEMENT
   Mercury batteries of the type used in the Clip-On
   Meter have an extremely good shelf life. A battery
    will give a constant current during its life, and
   when it dies, the current lowers rapidly. When
   the meter's battery is exhausted, the needle of your
    exposure meter will move slowly or not at all. The
   mercury battery used in the Clip-On Meter will       ,t
    last approximately one year, depending upon frequ-
   ency            LEAVING                      METER                 THE                             SWITCHED        of use.                                           EX.             fit'         NOT  ON WHEN                           RAPIDLY                IN USE                    WILL
  HAUST THE BATTERY: ALWAYS SWITCH                                                                                        i  THE METER OFF WHEN NOT ACTUALLY
F.  TAKING READINGS!                                                                                     I

To replace the battery, simply slide the Replace'
 ment Lever ou.t of the way so that the battery
 cover can be removed. The baftery will  lift  out
 easily and a new one can be put in. its place. Insert
 the battery with the positive (+) side in contact
 rvith the battery cover. The following 1.3v meftifry
                                                                                                                                 : battery may be used in your Clip-On Meter
                EvereadY E625

                                              pqecisionYour Asahi Pentax Clip-On Meter is a
:instrument and should be treated accordingly.
Protect it from shock, huniidity, salt air, and dust,
and avoid exposing it to temperatures aborve 140oF.
The glove compartment of a car is no place for
storing photographic equipment. Given proper care'
your., Clip-On Meter will deliver years of faithful'
accurate service.  i

  A$A}|I OPTICAT COMPANY   ITl|,
              c. P. o. 895,
           TOKYO
 Printed in Jopon