Film cameras
Bronica GS-1 User manual
User manual for Bronica GS-1. 44 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Bronica
- Model / document
- Bronica GS-1
- Document type
- User manual
- Language
- English
- Pages
- 44
- File size
- 3.7 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Page 3 · Read text
www.orphancameras.com Congratulations on your choice of the Zenza Bronica GS-l, a lens shutter type singlelens reflex camera in the 6x7 format. The GS-1 provides the professional user with a lightweight and compact 6x7 format single lens reflex of extremely useful versatility and multi-functional performance, which is based on the history and experience gained in the devel- opment of the Zenza Bronica ETRS and SO-A single lens reflexes, as well as the latest technological advancesin the electronic field. The GS-1 has been developed as a full-scalesystem camera, with a wide range of versatile accessoriesand especially with complete film back interchangeability which gives it multi-format capability for use in a wide field of applications, including commercial photography, news photography, scientific photography, etc., as well as giving this 6x7 format single lens reflex versatility equal to the 35mm singlelens reflex camera. Although instructions following are based on the GS-1 camera main body, the Zenzanon-Pc 100mm lens and the Film Back GS 120, the choice of finder is left to the discretion of the photographer who should also read the instructions for the finder chosen. The choice of lens, film back and finder should be basedon the type of assignmentcontemplated by the user. To obtain best results from theZenza Bronica GS-1, may we suggestthat you read this instruction manual through carefully, before you even touch the cam- era, as your pleasurein using the camera will be even greaterif you thoroughly familiarize yourself with its working parts before loading your first roll of film.View original page 3
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corvtenrrs
Specificationsof the ZenzaBronicaGS-1 2 18. SettingtheApertureRing . . .23
Partsof the ZenzaBronicaGS-l 4 1 9 . F o c u s i n g A d j u s t m e n t s . . . . . . 2 4
1. LoadingtheBattery 7 20. DistanceScaleand Depthof FieldScale . .25
2. Main Switch 8 2 1 . I n f r a r e d P h o t o g r a p h y . . . . . . 2 5
3. Displayand BatteryChecking. . . . 8 2 2 . F l a s h P h o t o g r a p h y . . . . 2 6 ,Finder
4. Attachmentand Removalof Film Backs. . I 2 3 . M u l t i p l e E x p o s u r e s . . . . 2 7
5. ConstructionofFilm Back . . . . . . .11 24. Mirror Lock-Up . .28
6 . F i l m L o a d i n g . . . . . . . . 1 1 25. RemoteControl Operations. . . . . .30
7. Film SpeedDial . . 15 26. InterchangingFocusingScreens . . . .30
8. ExposureCompensationDial . . . . .15 27. Removaland Attachmentof the Film
9. Film Type IndicatorFrame . . 16 W i n d i n g C r a n k A s s e m b l y . . . . 3 2
1 0 . E x p o s u r e C o u n t e r . . . . . 1 6 28. Attachmentof the Neck Strap . . . . 33
11. Film Winding/ShutterCocking . . . .17 2 9 . F a c t s a b o u t t h e B a t t e r y . . . . . 3 4
12. Film Unloading . .17 30. Pointerson Shooting . . . 35
13. Settingthe ShutterSpeedDial . . . . 18 31. Careof the ZenzaBronicaGS-l . . . .35
1 4 . S h u t t e r R e l e a s e B u t t o n . . . . . 2 0 32. Depthof FieldTables . .37
1 5 . T i m e ( T )E x p o s u r e . . . . 2 1 33. Specificationsof Zenzanon-PGLenses . . . 38
1 6 . E x c h a n g i n g L e n s e s . . . . 2 2
1 7 . I n t e r c h a n g i n g F i n d e r s . . . . . . 2 3
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Specification$'ofthe Zenza ihicarcs-t i iiiiirrri;:.:..t
Type 6 x 7cm format lens shutter single lens reflex camera, with interchangeablelens,film back,
finder and focusing screen systems.
Frame size 55.6 x 69.0mm (4:5 ratio matching the size of the photographic paper).
Fifm 120 roll film;22O roll film; 135 roll film in film cartridges;and Polaroid Land Pack films
(with exclusivefilm backs required for each film type).
Standard lens Zenzanon-PG 100mm F3.5; interchangeabletype; six elements in four groups; multi-layer
anti-reflection coated; 48o angle of view; F22 minimum aperture; and minimum 0.75m
focusing distance.
Filter size 72mm diameter on 100mm F3.5 standard lens.
Lens mount Bronica GS mount (exclusivefour-claw bayonet).
Focusingadjustment Helical focusing system built into each lens.
Lens diaphragm Fully automatic instant reopening lens diaphragm; 1 12 stop increments; equal-distant aper-
tu re scale graduations.
Shutter Electronic control SEIKO #0 between-lens leaf shutter; shutter speeds from 16 sec. to
1 /500 sec.,without intermediatesettings,plus T (time exposure), B (bulb) and A (automatic
exposure).
Shutter release Electro-magnetic shutter releasesystem; also has electro-magnetic cable releasesystem.
Film winding Film winding crank, with one full forward revolution or ratchetedwinding action.
Multiple exposure Multiple exposure possiblewith multiple exposure lever on camera body.
Mirror lock-up Continuous mirror lock-up possiblewith mirror lock-up lever on camera body.
Film back Dayfight loading interchangeabletype; exclusivefilm backs tor 12O and 22O roll films (6x7,
6x6 and 6x4.5 formats), 135 roll film (24x36and 24x69 formats) and Polaroid Land Pack
film; with ASA/ISO film speed dial and exposure compensation dial (coupling to finders
with built-in exposure meter). ]
Finder f nterchangeable type; shows 94o/oof the actual f ield of view (which does not change upon
exchangingfinders).
@
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Focusing screen Interchangeabletype; standard type, supplied with camera, has full-area matte screen.
Finder indications Shutter speed, etc., is shown at the top of the finder area, outsidethe screen area;5 digits,
7 segmentsand dot indication, depending on finder attached.
Flashsynchronization X€etting (for all speeds up to 1/500 sec.); automatic flash control, with direct exposure
metering of film surface is possible (with exclusivededicated electronic flash unit).
Battery checking Steady illumination or flickering of shutter speed display in finder, with half-stroke of the
shutter releasebutton.
Battery Single 6 volt silver oxide or alkaline-manganesebattery.
Dimensions 106.5(wide) x 99(high) x 80(long) mm - GS-l main body only.
106.5 (wide) x 1 16 (high) x 196.5(long) mm - GS-l, with standard100mm lens,Film Back
GS 120 and Waist-levelFinder G.
Weight 630 grams (GS-l main body only, without battery).
1830 grams (GS-l, with standard 100mm lens, Film Back GS 12Oand Waist-levelFinder G
but without battery).
The above specifications are subject to changeswithout prior notice when necessaryfor the
purpose of improving performance.
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A. Depress the battery chamber B. Coincide the plus (+) and
button with your finger and, at minus (-) marks on the battery
the same time, move the battery with similar polarity indications
chamber cover in the arrow-in- in the battery chamber. Then,
dicated direction. The cover will push in the battery.
come off quite easily. lnsert the battery chamber cover
into the BATTERY end first
and then move the cover in the
other direction until it locks.
* The shutter will not operate
when the battery is loaded with
polarity marks reversed.
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2 I MainSwitch 3 I FinderDisplayand BatteryChecki
The main switch is located on A. An LED display located over B. Turn ON the main switch
the upper left side of the main the top center of the focusing and then stroke the shutter re-
body . There will be no opera- screen shows the shutter speed, lease button halfways. lf the
tions unless the main switch etc., wh ich is viewed laterally LED display in the finder lights
is pushed down (i.e., switched reversed with the waist-level up steadily or flickers, as the
oN). f inder. case may be, the battery is
Since the LED display differs loaded properly and there is
* There is no power consump- with the finder in use, please sufficient power for operations.
tion, even with the main switch read the instructions supplied
ON" However, the battery-life with the f inder for correct usage {t lf the LED display does not
will be shortenedwhen the shut- and reading. light up steadily or does not
ter release is stroked halfways flicker, as the case may be,
and the shutter speed disPlaY (1) the battery is not loaded
lights up steadily or flickers. properly or Ql the battery is
Therefore, switch OFF (push completely drained and should
up) the main switch when it is be exchanged.
not planned to use the camera
for some times.
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4 Attachment and Removalof Film Backs
The film back is a film cham- with built-in exposure meters in a rush, or used for checking
ber that can be attached or de- are attached on the main body. composition or lighting effect,
tached f reely f rom the main This will, of course, be very con- before taking the actual picture.
body, thus permitting f ree ex- venient when using films of dif-
change of f ilrn types, at all ferent sensitivities in the film {F Film backs are avaifable op-
times. Since the main body and backs. tionally and the type meeting
film back are always fully cou- the requirernents of the photog-
iF Make full use of film back in- rapher should be chosen.pled, upon connection, always
turn the film winding crank terchangeability, in the f ollow-
completely one time, upon at- tng manner:-
taching the film back. lf wind- 1. Take full advantage of the
ing is not possible, all prepara- multi-format superiority of the
tions for taking the picture have GS-l and use film backs in
been completed. lf winding is many different formats, wh ich
possible, however, rotating the will not only give you different
f ilm winding crank until it stops effects but will economize on
automatically takes care of the f ilm.
incompleted action, whether un- 2. Take \/our pictures in color
cocked shutter or film not ad- and black-and-white, and in dif-
vanced. Th is means, of course, ferent film speeds, as required.
that it's possible to choose the 3. Keep a sufficient guantity of
film type most suited for the preloaded film backs on hand
shot, even midway in a roll. and speedy, continuous shoot-
ing will be possible.
An ASA/ISO f ilm speed dial 4. Don't waste unsuitable film
and an exposure compensation used in a previous session but
dial are available on the film simply load up a new film back
backs. When used for setting the with the required film type.
film speed of the film loaded 5. The Polaroid Film Back can
in the film back, there is auto- be used for instant color or
matic coupling when f inders black-and-white pictures, whenView original page 12Page 13 · Read text
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A. To attach the film back to B. The dark slide must be in- C. Depressthe film back release
the main body, simply insert the serted into the dark slide slit, button and the lower end of the
latches at the upper end of the for removing the film back from film back can be removed, as
film back into attachment open- the main body. Insert, with the illustrated. Simply shift the f ilm
ings at the upper end of the @ mark at the top, as illustrat- back up slightly and pull it
main body. Then, press the ed, and then push in all the way. away.
lower end of the f ilm back
against the main body until it * There is danger of the film * The dark slide cannot be
locks securely. back becoming detached from withdrawn from the film back,
the main body, if the dark slide when the film back is detached
* The dark slide must be with- is left in its slit while the camera from the main body.
drawn from its slit, upon attach- is being carried. Therefore,make
ment of the film back to the it a rule to withdraw the dark
main body, as otherwise the slide whenever the film back is
shutter cannot be released. attached to the main body.
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F i l m h o l d e r
A. The film back consists of a B. The film back frame has a A. To open the back cover,
film holder and f ilm back frame, base with a dark slide slit and a squeeze the top and bottom
with exclusive film backs avail- back cover with an ASA/ISO back cover release buttons, in
able for 120 and 220 roll films. f ilm speed dial, an exposure the arrow-indicated directions,
The film holder is not only de- compensation dial and a film at the same time and the back
tachable from the film back but type indicator frame. The film cover will open.
also has a built-in film winding back frame completely encloses
mechanism. the film holder and shields it
from outside light, as well as
* Read instructions supplied connecting it to the main body
with the Film Back GS 135 for and also coupling with finders
loading135 roll film. with built-in exposure meters.
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E. Rotate the manual film F. The starting point can also * lf the film is not advanced
winder on top of the f ilm holder be aligned with the start-mark, when the film winding crank
in the arrow-indicateddirection with the film holder loaded in is rotated, however, the f ilm
and wind up the film leader. the film back. In this case, holder is not loaded properly in
When the starting point, or ar- simply rotate the film winding the film back and/or the camera
row mark, appears,align it with crank of the main body to align main body may be set for multi-
the triangular V start-mark on the start-mark. This method is ple exposures.In the latter case,
the right top side of the film preferable since there will be return the multiple exposure
holder. Then, stop rotation. coupling with the camera body lever to an upright or vertical
mechanism,from the beginning. position.
(See "Multiple Exposures" on
page 27.l
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G. Close the back cover, by H. Upon loading the film, ro- l. The manual film winder is
pressing it f irmly against the tate the film winding crank until used to place the f irst f rame
right side of the film back base, it stops to place the first frame into position, when the film
as illustrated. The back cover into place for taking the picture. back is detached from the main
will automatically lock and The exposure counter will also body.
close. change from "S" to "1", with The manual f ilm winder will not
The same operation will close the film advancedand the shut- stop rotating, even when the
the back cover when the film ter cocked. film is in place for the first
back is detached from the main f rame, but should be rotated
body. 2 or 3 times more, in order to
take up slack in the loadedfilm.
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1 2 0 r o l l f i l m I S t a r t i n g m ark
22O roll film
I Do t t e d l i n e S t a r t i n g ma rk
* When loading 220 roll film Set the film sensitivity of the Exposure compensation up to
in the Film Back GS 220, do film loaded in the film back, +3 stops is possibleat 1/3rd in-
not mistake the dotted line be- when using finders with a built- crements. To set the required
fore the arrow mark for the in exposure meter. To set the compensation, slide the expo-
start-mark. film speed,depressthe ASA/lSO sure compensation dial lock
film speeddial lock button and, button, in the arrow-indicated
* For the use of f ilm backs at the same time, rotate the direction, then rotate the ex-
other than the 6x7 format, read ASA/ISO film sppeddial and set posure compensation dial, as
the instructions supplied with the required film speed to the required.
the film back. index. The dial has click-stops When compensation is not
at 1/3rd increments. needed, simply set to "O",
where it is locked.
* There will be no effect on the
exposure, no matter where the
ASA/ISO film speeddial and ex-
posure compensation dial are
set, when a finder with a built-in
exposure meter is not used.
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Upon loading the film, tear off
the end flap from the empty O ran ge
film packageand insert it in the
film type indicator frame. This
will help you keep track of the
film loaded in the film back,
even when two or more film
backs are used with different
types of films.
Or ange White Or ange
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The filrn winding crank auto- A. After the 10th exposure of B. Remove the film holder and,
matically stops, when rotated the 120 roll film (20th exposure while preventing the loose film
completely one time in the for- of the 22O roll film), continue from unwinding, take out the
ward direction, with film ad- rotating the film winding crank take-up spool. Seal the exposed
vanced one frame and shutter and the film only will be ad- film and return it to its original
cocked, at the sametime. vanced until the remainingfilm box until development.
Or, short, rapid strokes, up to and leader paper are wound up
an accumulated full rotation, on the take-up spool. * Load and unload film away
will also do the same job be- Open the back cover when there f rom direct sunlight and/or
cause of a ratcheted mechanism. is no resistancein the winding strong illumination.
action.
* The mirror lock-up lever must
be vertical at all times, except
when shooting with the mirror
locked up.
(See "Mirror Lock-Up" on page
28.1
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C. The shutter speed dial is set It The shutter speed, when the
to A, for aperture-priority AE shutter speed dial is set to A, is
photography when a f inder with 16 seconds,when a finder with
a built-in exposure meter is a built-in meter is not attached.
attached. To set A, press the
shutter speed dial lock button
and rotate the shutter speed
dial, at the same time. To
change from A to another set-
ting, for manual photography,
pressthe lock button and rotate
the shutter speeddial to the re-
quired setting. However, the
shutter speed dial cannot be
moved directly from A to B, in
this case,or from B to A, too.
@View original page 22Page 23 · Read text
www.orphancameras.com An electro-magneticshutter re- In the following cases,the shut- 6. Lens release buttin is de- lease button is incorporated in ter will not be releasedand the pressed. the Zenza Bronica GS-l . Strok- shutter releasewarning LED will 7. All frames (i.e., 10 frames ing the release button halfway light up, except in the first in- for 120 roll f ilm and 20 for 22O illuminatesthe shutter speed,as stance:- roll film) have been exposed. digits and dots, etc., in the dis- 1 . Main switch is OFF. play panel in the top center of 2. Dark slide is inserted. 'rr There will be u nderexposure the f inder, outside the screen 3. Film is not advanced.(Same if the film winding crank is ac- area. when exposure counter is be- cidentally rotated before con- The display will go out when twggn "S" and "1".1 clusion of the exposure, on a the releasebutton is stroked all 4. Shutter is not cocked. slow shutter speed setting. Fur- the way and a shutter release 5. Lens is not attached Proper- thermore, the shutter will not warning LED will light up mo- ly. (Same with automatic exten- be released on the following mentarily, when the exposure sion tubes, too.) shot until the remaining time is completed and the shutter f or the previous exposure has blades are closed,which should elapsed. be checked when using a slow shutter speed. @View original page 23
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A. First, cock the shutter with B. Slide the time exposurelever
the f ilm winding crank and then and releasethe shutter, when a
pull up the time exposurelever red-colored "T" is exposed on
re lease. the lens barrel. The shutter will
stay open until the time expo-
sure lever is moved in the op-
posite direction, exposing the
letter "A", which will close the
shutter.
* Except for time exposures,
always shift the time exposure
lever so that the letter "A" is
visible on the lens barrel and
keep the time exposure lever
releasepushed in all the way.
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l5 ExchangingLenses l
A. To attach the lens, align the B. To detach the lens, pressthe
white dot on the main body and lens release button down and,
the red dot on the lens, and at the same time, rotate the lens
then insert the lensf ully into its clockwise (as arrow indicated)
mount. Rotate counter-clock- until it makes a full stop, at
wise (in the arrow-indicated which point it will be possible
direction) until it stops, with to detach the lens.
an audible click, which will in-
dicate that it is securely locked.
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A. Various types of optional B. To detach the finder, simply A. The aperture ring is rotated,
finders can be interchanged to depressthe finder releasebutton in either direction, to set the
match shooting conditions to and, at the same time, slide the required F/number opposite the
photographic conditions. To at- finder backwards where it can white index dot. The aperture
tach the finder, align the front be detached. ring click-stopsat the numbered
end of the finder with the front * Read instructions suppplied settings, as well as intermediate
end of the finder frame on top with the optional f inders on 112 stop settings. The aperture
of the main body, as shown. their use. ring may also be set midway be-
Then, gently lower the finder tween tne 112 stop click-stops,
and, when well seated, slide too.
forward until it locks. 'l * The intermediate 14 stop
settings cannot be used when
finders with a built-in exposure
meter are used. Click-stop set-
tings only can be used, in this
case.
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www.orphancameras.com B. The Zenzanon-PG Series in- * When using finders with a The lens is focused on the sub- terchangeable lenses have fully built-in exposure meter, expo- ject, by rotating the focusing automatic lens d iaPhragms sure measurements should not ring in either direction, while which means that the focusing be taken with the depth of f ield checking the effect on the cen- screen is always viewed at the preview lever depressed, as the tral matte surf ace area of the full aperture, with the brightest shutter speed indicated will focusing screen (standardtype). possible image. Depressing the cause over-exposure.This is be- depth of f ield preview lever cause proper exposures are ob- stops the lens diaphragm down tained with exposure measure- to a pre-selected lens opening ments made at the f ull aperture. and permits checking of the depth of f ield effect on the focusing screen. * The aperture ring must not be adjustedwhile the dePth of f ield preview lever is being depressed. @View original page 27
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