Konica Light Meter for FS User manual

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KONICA TIGHT TIETER
  The KONICA LIGHT METER is designed for
use with the KONICA FS single lens reflex camera.
It is a reflected light, battery-powered photocell
exposure meter which clips on to the camera, with
the shutterspeed dial of the meter mechanically
coupled to the shutterspeed dial of the camera.
  The photosensitive element of this light meter
is a semi-conductor, cadmium sulphide (CdS),
which is far more sensitive than the conventional
selenium photocell. This permits the measurement
of the light value of subjects too dark for selen-
ium. Moreover, because the coverage angle of40'
approximates the picture angle of the standard
lens, accurate determination of exposure settings
can be made from picture-taking position.

GENERAL DESCRIPTION
 Cross-Coupl ing System:
     Mechanical coupling of shutterspeed dials, direct reading
     of aperture setting for nanual selection.
Measurement Principle:
     Reflected light pick up by cadmium sulphide photocell,
     high and low LV ranges.
Sensitivity Range:
   LV 2 (I Sec. at f/2) throush LV 17 (1/1000 Sec. at
    f/16) when using filmspeed ASA 100.                                                                                                                                                    ,r
Coverage Angle:
    40' diagonally across frame.
Photosensitive Element:
   Cadmium sulphide (CdS) semi-conductor, 5.5X8.4mm.
Power Source:
    1.3 volt mercury dry battery (Mallory 625 or 630, To-
    shiba TH-NC, or National MD).

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      Power Source Check:
         Mercury battery can be checked by pressing battery
          check button and reading meter indication
       Filmspeed Range:
       ASA 6 tO ASA 32OO DIN 9 tO DIN 37.
       Shutterspeed Dial Settings:
         B. t to 1/1000 Sec.
       Aperture Scale Range:
                                                                          f /16.v                           f /I.4 throush
                       CAUTIONS:
        When not using the KONICA LIGHT METER' do not
                              rOFFt position         fail to turn selector switch to
        Do not to expose excessive humidity and heat (not
       more than 60'C ).
        Do not subject to vibration or shock
        When storing for any length of tine, remove fromlea-
        ther carrying case, and place in dry wooden box with
       some desiccant. Avoid storing in metallic container.

fiTOUNTING ITIE TIGHT ffIETER
   ON THE CA}IERA
                                (1) While keeping the
     Ar  ' ri.r    tl  i                           \'    .'1, r .; ,,   :  :   .il     mounting catch open, fit
                        KONICA LIGHT N4E-
                            l'ER over top of penta-
                            prism housing so that
                                  the mounting fork slips
                            squarely over    the
                               accessory mount below
                                 the e1'epiece guard.                            Mike Butkus  DigitallyDN:email=mike@butkus.org,Date:cn=Mike2026.05.18signedButkus,by22:32:11Mikeo, ou=Butkus.org,Butkusc=US-04'00'
                                     Release. mounting catch
                                                        onN4, -,|l Iil  i)irr,'     V1o..rrl Ir.i F,  ti,.              to permi t it to hook
                                 eyepiece guard

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(2) Turn the shutterspeed
     dial, either to the right
   or to the left,   until       Plrutrr  tll  Wrrrrlow Bo1, ry Clrnrrt (r  C,,v,
    coupling pin catches on
   camera shutterspeed
     dial, and both dials turn
     together.
 TO REMOVE
     FROM CAMERA
  Open the  mounting
                                                                            Orrulrlrtrrl Prrr    Mourrtrrrtl  (jalr h   Ztro  Arjt  catch, and lift  the light
 meter upward and away
  from the camera.

HOW TO USE FOR PICTURE-www.butkus.usTAKIN G
                          ISet filmspeed on
                              your KONICA LIGHT
                          METER
                             Turn the aperture
                                    dial until the speed
                                      rating of the film you
                                     are using appears in the
                                       opening of the filmspeed
                                                      rati ng  i ndication  (ei ther
                             DIN or ASA).
                        lWhen subject is
Aperture setting t/4 is indicatod                brightly  lit

When the subject is brightly illuminated (in bright sunlight or
  under good artificial lishting) turn selector switch to                                                     'H.
  (high I-V position). Choose your shutterspeedo dependiqg
  generally on your subject, and set the shutterspeed dial
  accordingly. Point your camera toward the subject. The
  light reflected by the subject will strike the photocell, and
  cause a deflection of the meter needle. Because selector
  switch is at \H- position, read orange-colored" high LV
  scale to obtain aperture setting (f/value). Setyourcamera
 aperture control to this value. If, because brightness of
  subject is insufficient, the meter needle is not deflected
 onto the orange-colored, high LV scale, turn shutterspeed
 dial to slower speed
TYHEN NOT USING KONICA LIGHT lvETER, ALWAYS
                        \OFF\ POS|T|ON.TURN SELECTOR SWTTCH TO

camera toward subject, and read white, low LV scale to
 obtain aperture value. If the meter needle stays on the
 high LV scale, and does not move over onto the white, low
LV scale, turn shutterspeed dial to slower speed setting.


   If the meter needle is deflected all the way across the
scale, ihe subject is too bright for low LV range ('L.
position). Turn selector switch to \Hq, and use orange-
colored high LV scale.

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IWhen aperture is pre-set at some desired value
     If, for any reason, you to wish a take picture at a
  given aperture setting, first adjust aperture control to
  desired value, then turn selector switch to either \H.. or
  \Lq position Point camera toward your subject, then by
  turning the shutterspeed dial bring the high or low LV
  scale ( depending on position of the selector switch )
  graduation indicating the sperture value you have selected
  on your camera into alignment, through the guide line,
  with the meter needle. You will then automatically obtain
  the correct shutterspeed for the aperture size you have
  chosen beforehand.
    In this case, do not leave shutterspeed dial at inter-
  mediate positions. Move to click stop position, and make
  fine adjustments by means of aperture control.

SPECIAT WAYS OF USING
        YOUR KONICA TIGHT frTETER
  The KONICA LIGHT METER functions on reflected
light to indicate correct settings for optimum exposure.
Consequently, in common with all meters of this type, there
may be situations in which simple measurement of bright-
ness from the picture-taking position will not give satisfa-
ctory results. Extraneous lights and reflections may cause
distortion of measured values. In the cases described below,
use special procedures.
Scenery with big amounts of bright sky. The bright
sky will cause the meter to indicate higher light value than
that appropriate for the foreground and main subject-
matter. In such cases, measure brightness of the subject
at close range,orpoint your camera toward the foreground
to eliminate most of the sky, choosing some reference spot
midway between your feet and the horizon or skyline.
When photographing people against bright background
(reverse lighting) or when brightly  lit  subject is

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       photographed against dark background. Measure
        brightness of subject at close range (the closer the bett-
       er) to minimize the effects of the background-  If
        brightness measurement is done from picture-taking po-
          sition you will obtain under-or overexposed negatives.
      When performing copying work. See that subject and
         photocell window are squarely face to face. If subject is
      a white sheet of paper, the correct value will be indi-
        cated- If subject is dark (or black portions predominate),f       cover with white paper when determining exposure.
      When using color film. The normally bright portions,
       of the subject matter should be used as the standard for
         light value measurement, In the case of color photography,
        the contrast between bright and dark portions (color
         balance) of the subject is as important at correct overall
        exposure. The ideal ratio for good color balance is 1 I 4
        for dark versus light portions.

SOURCE CHECK
           press the battery check
 button, the meter needle should move
 and point to the battery check indicati-
on. If deflection of the meter needle
is below this mark, the mercury dry
battery powering the KONICA LIGHT
METER should be replaced Mercury Batterv chamber
dry batteries are not prone to self-dis-
charge, while their potential remains      M ercury
fairly constant until the end of service Dry Battery
Iife. Sudden drop of voltage at end of
capacity is a characteristic of this type Battery Chamber Cover
of battery.

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   ,NT?CURY DRY         ZERO ADJUSTmENT
   BATTERY REPTACEIIENT                                                   If, when the selector     To change battery, use coin to                                      switch is at \OFF: po-     turn counterclockwise the battery
                                                              needle     chamber cover on underside of the    sition, the meter
a     light meter. A slight twist will   does not indicate \Or,
     unlock cover for easy removal.      correction can be made
 r    Replacement batteri es are standard   by turning the zero adjust     mercury cells available on the
    market (1.3 volt, Mallory 625 or   screw on the underside of                                             'Use     630, Toshiba TH-NC, or National   the light meter.       a
    MD). Place the positive (*) side   small screwdriver, turning    of the battery on the inside of the
                                                                               until     cover. Insert battery and cover   gently right or left
     in the battery chamber, and twist   needle is zeroed in.
     to the right to secure.

SEKONIC STANDARD REFTECTOR BOARD
  This standard reflector board is of neutral coloration,
and is designed to reflect 18% of  the light impingrng
upon it. Since under any lighging condition it will reflect
only l8o/o of the light to which it is exposed it  serves
as a standard the equivalent of the average reflecting
property of all photographic subjects, or the mean of the
light and &rk portions when contrasts are present.
  To use this standard reflector, place it parallel to the
main surface of the subject, under the same lighting
conditions, and measure its brightness from a distance of
10 cm. Use the value obtained for adjusting the oposure
settings of your,camera The use of this neutral standard
board is particularly helpful when workin{-in color.

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oN cADmrum supHrDE (cds)
  Cadmium Sulphide is a semi-conductive compound which
changes its resistance in proportion to the brightness of
the light it receives. It differs from the selenium phe
tocell which generates electricity when excited by light,
and therefore requires no outside source of power. The
more sensitive CdS element uses a battery as the prime
source of power, and the changes in  resistance, caused
by varying intensity of light, are indicated by the meter.
The CdS cell is unaffected by heat and humidity, and is
several hundred times more sensitive to light than the
selenium cell.