Bronica CDs MF Finder S User manual

The CdS MF FinderS,which you have purchased, has been specially designed
as an integral accessory in the Zenza Bronica SO System of Photography and
converts the SO into a TTL (thru-the-lens) CdS exposure metering single
lens reflex, powered by the battery in the SO camera body, with three color-
coded LEDs for exposure adjustments in both the diaphragm-priority and
shutter speed-priority mode, as preferred.
To obtain best results from the CdS MF Finder S, when attached to the
Tenza Bronica SO, it is suggested that you carefully read through this in-
struction manual once, as your pleasure in using the SO with the CdS MF
Finder S will be even greater if you thoroughly familiarize yourself with its
operation before trying  it for the first time.

Specifications
Magnif ication                 1.0X, with the standard 80mm lens
Finder field                 52.3 x 52.3mm (94o/o x 94o/ol
Eyepiece diopter correction  -3 to +2 diopters (with adjustment ring)
Exposure measuring system  TTL (thru-the-lens) full aperture exposure measure-
                        ments; full area average readings, with two CdS
                                photocells.
Shutter coupling range     8 seconds to 1/500 second lin 112 stop increments)
Exposure measuring range   EV 4 to EV 16 (ASA 100 film)
Film sensitivity range      ASA 25 to 3,200 (DlN 15 to 36)
Finder indications      LED 3-point indications or over-exposure (red-
                         colored), correct exposure (green-colored) and
                                    u nder-exposu re (red-colored).
Dimensions and weight    80mm wide x 83mm long x 79mm high, including
                            rubber eyecup;
                         200 grams.


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                    Name of Parts





                         Mike Butkus DigitallyDN:org,Date:cn=Mikeemail=mike@butkus.org,2026.01.15signedButkus,by21:04:37Mikeo, ou=Butkus.Butkus-05'00'c=US

Shutter speed dial wi
      Shutter speed

        Lock but



         Display but

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A. To detach the finder on      B. Before attaching the
the camera body, simply    CdS MF Finder S, first,
depress the finder release      wipe the contacts on both
button, while, at the same      the camera body and the
time, sliding the finder or        finder, with a soft cloth, to
the finder cover backwards      obtain optimum contact.
where it can be taken off.


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C. To attach the CdS MF      D. The shutter dial circuit      E. To detach the CdS Finder S, simply align the      in the camera body  is    MF Finder S, simply fol-
 front end of the finder       automatically switched off  ,     low instructions in "A". with the finder frame (the     upon attachment of the
 shiny square frame on     CdS MF Finder S.
 top), as illustrated.             There{ore, the  shutter
 Then, gently lower the      speed dial on the body can
 finder and, when well-     be set to any speed, as it
 seated, slide forward until       will have no effect on the
  it locks into place.               exposure setting.

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Simply depress the battery     (See " Loading the Bat-
check button on  the       tery" and "Battery Check-
camera body and a red-       ing" of the Zenza Bronica
colored LED battery check   SO instruction manual.)
lamp will light up in the
central front area of the
CdS MF Finder S, if the
battery is loaded properly
in the camera and if there
is sufficient power for op-
erations.

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     Eyepiece Adjustment





The eyepiece can be ad-       Rotating in the clockwise
justed to suit the user's       direction will provide ad-
eyesight, by rotating the       justments up to +2 diopters
eyepiece adjustment ring        whi le counter-clockwise  ro-
while placing the user's eye       tation will provide adjust-
flush against the rubber       ments up to -3 diopters.eyecup. Rotate in either     The index should be used
direction until the micro-      as a gu ide for future ad-
prism/split-image spot in        justments.
the center of the focusing
screen is observed clearly
and distinctly.
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Diaph ragm-Prioriqr Exposu re Adjustrnents





A. Rotate the  aperture      B. Depress the lock button      C. Rotate the  shutter
ring of the attached lens       inwards to release the dis-     speed dial either wdV,
and set the required Fl       play button.                  while checking the LED
number opposite the white       Depressing the display but-      display in the finder, until
index dot.                  ton will now allow ex-     the  green-colored LED
 *  I ntermediate aperture set-     posure measurements for       lights up. Always set the
tings are not  possible,       about 30 seconds.                   d ial to the nearest clic k-
when the CdS MF Finder S                                     stop. The setting can be
is attached.                                                    confirmed  f rom the shutter
                                                               speed dial window.



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                                       Over-exposu re

                       1 lRed-colored                                             illumination




                                       Correct exposu re

D. Exposure adjustments                  j  lGreen-colored           E. When exposure meas-should be completed  in               lrllumrnatron            urements are not required
about 30 seconds, as other-                                        (such as, when storing the
wise, it will be necessary                                   camera), move the lock
to depress the display but-                                   button outwards and lock
ton once more to continue                              the display button. Th is
metering.                              Under-exposu  re            will  prevent accidental
                                                              metering and, consequent,
                                                                    drain on the battery.

                                        Red-colored
                                             illumination
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j{6ls*,,:'o,g'yt:ry:"':.lil','n:lj:._-- *-              -A. Adjust the shutter speed dial on the       * When the CdS MF Finder S is fixed on
 finder and set the required shutter speed.       top of the camera body, the red+olored
 B. Depress the display button, for taking     LED above the focusing screen area will
 exposure measurements, in the same manner        briefly illuminate as shutter closes, whichas for diaphragm-priority exposure adjust-       means that it will prove very convenient at
 ments.                                           slow shutter speeds.C. Rotate the aperture ring of the lens, in
 either direction, until the green-colored
LED lights up.
The aperture ring should also be moved to
the nearest click-stop setting, in this case, as
*intermediateDo not movesettingsthe aredepthnot ofpossible.field preview
lever while metering, in both diaphragm-
priority and shutter-priority modes, as there
will be over-exposure, in this case, corre-
sponding to the difference between the full
aperture*  Alwaysandplacethe stopped-downthe eye flushaperture.against the
eyecup, when making exposure adjustments,
as otherwise light may leak in and affect the
measurement.* The shutter speed dial must always be
stopped at the nearest click-stop.

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The shutter speed indications are readl
   1S - 8S: 1 second to 8 seconds   2 - 500: 1/2 second to 1/500 second   How to use the Table:
     lf EV 14 is the correct exposure, with
  ASA 100 film, the shutter speed setting
    will be 11250 sec., when F/8 is set to the
   aperture ring. (See the thick red lines
   drawn on the table.)
     lf the aperture should be set to F/l1, in
   the above case, it can be seen that the
    shutter speed setting will become 11125
    sec.
  A "brightness of EV 14" is the bright-
    ness outdoors on a bright sunny day.
   Exposure Measuring Range
   The exposure measuring range with the
  CdS MF Finder S is EV 4 to EV 16
    (with ASA 100 film).
   EV, or exposure value, is a combination
    of shutter speed and aperture('Flnumber),
   as determined by the film speed and the
    intensity of the light.


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  Care and Storage
Cleaning of the eyepiece and protective               lf the accessory has been exposed to
glass should be restricted to blowing          salty air (or water), wipe the exterior
with the blower brush, after which lens           carefully with a well-wrung damp cloth
cleaning tissue and liquid should be used          (using fresh water). Then, dry with a
to lightly wipe the surfaces.                           soft, dry cloth. And, have the accessoryDo not use silicon-coated cloth, as it           inspected at the authorized repair station,
will prove harmful to the coating.                              if necessary.
However, use the silicon-coated cloth, or         Store the accessory in a tin-lined con-
a soft cloth, to clean the exterior of the           tainer, with plenty of desiccant, such as
accessory and never use solvents, such as            silica gel, if  it is not being used forlens cleaning liquid, alcohol or thinner,        some time. And, store in a cool, dry
for this purpose.                       and well-ventilated (but not windy)Do not leave the accessory for a long           location,   f ree of naphthalene and/or
time in extremely hot locations, such as          camphor.summer beach or car parked in the sun,
as the accessory may be affected, leading
to improper exposure measurements and
even to damage.
Should the camera and accessory become
over-heated, under the above circum-
stances, let them return to the ambient
temperature  level before using them.
Wipe and clean the accessory very care-
fully after using it in wet weather or
at the seashore.


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