Cosina Ct 7 User manual

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Specification
C"."r" Type: Automatic 35mm SLR with aperture preferred TTL digital metering system.
Fifm Formal: 24mm x 36mm
fiim sire ana &pacity: 35mm perforated film in 12,20,24 and 36 exposure cassettes.
Lens Mount Quick release K-type bayonet mount.
Sftutt"it Electromagnetically cbhtrotted metal focal plane shutter-vertical travel. and 2 seconds to 1/1000lpil; fro; B-s;6nos to irt oOo second in autoniatic modesdcond + "8" in manual mode.;e(Bulbl, t-T(Long iime; and X(1/100 seconQ)" .ale provided.eteiclroriiagn'etic Snutter'release with release lock has cable release provision.
S"it-ti1nert-Electronic control with blinking LED(lamp) and emitting an electronic tone-
App.*. f OseConOs delay. LED pulsations iicrea.se approx. 2 seconds before shutter operates'
gidosure Measurement Systeml TTL open aperture, Center-weighted mea,surement.
Auiomatic Mode: Aperture priority sy'stem-LeD lights against cbrresponding shutter speed
on viewfinder scale. F1.4 - F22l 100 at - to EV range exposure +19(ASAooerating EV -2 disp.lay. LED viewfinder 16 with Match LED systemM'anual Mode:
FiiiXeiing LEO inOiCates coriect shutter speed, steady LED indicates manual shutter speed.
Both LED's should coincide for correct exposure.-*posure Memory (Lock) System: Exposure information can be locked in memory using
memory lock button.
Film Speed Range: ASA 25 to ASA 1600
Vie*fiiAert f i*50 pentaprism type, 1:0.9X magnification at infinity with SOmm lens' 93%
view of actual pictlre fi6ld for both horizontal and vertical.
ViewfinOer Oisplay lntormaiion: Shutter spee{ information scale with 11 LED indication from
1 second to 171600 second, plus B, LT, OVER, M(Manual) and Auto.
"8": Buld,,tT;'t Gng Time. Speed from I second to 2 second in automatic mode and 2 second only
in manual mode.;;O!ER';: Over exposure warning, but even in this case shutter speed is limited at 1/1000
second.

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"M": Manual modg.
"AUTO": Automatic mode.
Film Loading: Easy-load system. Six-slotted takeup spool.
Film Advance: 135' Single stroke rapid film advance lever with built-in double exposure
prevention. Standoff angle 30'.
Exposure Counter: Progressive type - "S"(start) to "36". Counter automatically resets by
opening back cover. Contrasting (orange) indications at "S", "12", "20", "24" and "36"
exposures.
Film Rewind: By rewind crank and button.
Battery Check: By LED metering indicators in viewfinder.
Power Supply: Two 1.5 volt SR44 Type Silver Oxide batteries (G-13, EpX76, S-76) or LR44
Type Alkaline Manganese Dioxide batteries (A-76)
Dimensions (Body only): 133mm (5.32") x 85mm (3.40") x 48mm (1.92")
Weight(Approx. Body only): 450 g
Adaptable accessories: Cosina Auto-Winder and Exclusive Speedlight Auto-160
      (Specifications subject to change without notice)

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(1) Description of Controls 24. Film rail 25. Viewfinder window 1. Film Advance Lever shaft Rewind 2. Shutter release lock/Safty lock on symbol 26. sprocket Film advance 27 . "1" 28. Film rewind button 3. Shutter release button 29. Multi slotted takeuP sPool 4. Exposure counter window 30. Film presure Plate 5. Strap lugs cover Back 31. 6. Self-timer switch/blinking LED conversion chart and film DIN/ASA 32.
7. Buzzer rewinder pocket 8. Bayonet mount lens locking/release 33. Auto winder locating pin socket button 34. Winder couPling 9. Finger dot 35. Tripod/Winder screw socket10. Down button 36. Battery cover button Up11. mode and "X" button (M.X. button) 37. Winder electrical contacts M'inual12. 13. Automatic mode button (Auto button) 38. Film chamber
14. Hot shoe with built-in "X" contact and
dedicated flash contact
15. Film rewind crank
16. Film rewind knob
17. Film speed dial
18. Film speed index dot
19. Aperture setting ring
20. Distance scale
21. Exposure memory lock button/self-timer
cancel
22. Aperture/distance scale index/depth of
field scale
23. Focusing ring

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(2) lnstalling the batteries
Your Cosina CT-7 is powered by two 1 .5 volt Alkaline Mangnese
Dioxide or Silver oxide batteries.
To install batteries:
1. Unscrew and set aside the battery compartment cover, using a
coin or similar item.
2. Insert both batteries with the positive (*) sides facing into the
battery compartment (Negative (-) sides must be facing you).
Refer to the Fig.3-4.
This indication must be watched very carefully.
3. Replace the battery compartment cover, making certain it is firmly
Tightened.
4. To check the battery wind on the film advance lever, then unlock
and depress the (two-stage) shutter release button holfway down.
This will light either two or three LED's (depending on whether the
camera is in "AUTO" or "MANUAL" mode) and confirm that the
batteries are correctly installed and functional.
lf LED('s) fail to light, recheck for correct installation and, if necessary,
replace with fresh batteries.
NOTE:
1) Make sure that the batteries are wiped clean with a dry cloth
before installation. Fig. 4
2) Take the batteries out when your camera is not in use for a long
or indefinite period.
3) Do not advance the film after taking a picture in order to avoid
I draining the battery. 4) Lock the shutter release button when your camera is not in use. ffi.}wffiffi

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(3) Loading the film
1. Release the safety lock on the shutter release button by turning
it away from the locked "L" symbol.2. Def ress the shutter release button to ensure shutter mechanism is +r'
not cocked. ) ]"73. Fold out and pull up on film rewind crank and knob assembly until
camera back snaps open.
4. Insert lilm cassette into the film chamber and push the knob and
crank assembly down until the forked shaft locates with the cassette Fig. 5spindle. lf necessary, rotate the knob back and forth slightly to
ensure proper location.
5. Draw film leader across the film aperture and insert in one of the
slots in the film takeup spool. Wind film advance lever to secure film
on the takeup spool, making certain that the film sprocket holes are
properly engaged with the film advance sprockets.
6. With lne titm rewind crank still extended, rewind the film very
slightly to take up any slack between cassette and takeup.spool.
After Checking that the film is securely attached and t racking
accurately, fold down rewind crank and snap camera back firmly
closed.
7. Look in the exposure counter window which will show the letter
"S"(Start) centered against the index mark Wind on the film advance
lever as then release the shutter, by pressing down on the shutter
release button. Repeat this procedure "O" will appear in the window.
Advance the lever'once more and you are ready to make your first
exposure. The exposure counter returns to the "S" position
automatically when the camera back is opened.
NOTE: To confirm that film is being correctly transported, check
the film rewind knob, which should rotate each time the film advance Fig.7lever is wound.

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www.butkus.us                                                                                    ENGLISH





                                Fig. 8                                                                            Fig. 9

(4) Setting the film speed
 ror correcily exposed pictures  it is important
to set the CT-7's etectrdnic digital metriring
systam to coincidi with the RSR or Ottt
rating of the film you have loadeO in vowcamera. to set the film speed: the correctrati ng.
1.. Rotate the Film speed diat in either
direction until alignd with the film speed indexdot.
2. Insert tab from end of film carton in filmrewinder pocket.
NOTE: A DIN/ASA conversion chart is
provided in the pocket on the camera back.                                        Fig. 10

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(5) Selector buttons
4 operation button (AUTO, M.X, UP' and DOWN) are
orovided on the key board.
Wnen opelating th6 buttons you need to lool< through
the viewfinder to see the functions'
nuto: Push the Auto button when your camera is in
use in the Automatic mode.
 rrr.i.; push the M.X. button when your camera is in
use in the Manual mode and "B (Bulb)" mode'
 iiin tne manual mode 1/125th sec. is automatically s6t Up when the MX button has been pushed, each.
torCn of the up button will double the shutter spei^{.,
 i.e. i U r ZStn sec. uP 250 sec. uP 500 sec. uP 1/1000th
 sec. UP "B".
Down each touch of the down button will half the
 shutter speed  i. e.1/12Sth sec' Down 60 sec', 30 sec',                                  Fig. 11 15 sec. right through to "8".

 (6) Automatic (Aperture-Preferred) exposure
 in ine "Auto" mdO6, your CT-7's electronicexposure  control system.auto-matically  compute.s
 and set the correct ihutter speed for your pre;selected aperture setting, l1ylr1.g consistently balanced enposures from 8 beconds io 1/i000th second and indicating "OVER" exposure
 condition when available light is too bright.
 To take photographs in the "AUTO" mode:
 1. Cock ine sn-uttdr by winding the film advance lever as far as it will go in a counter-clockwise
 OireCtion (all the operation but-tons are non-fu1lrJr)ool  until the shutter is cocked). Pu.sh.the.
 "AUTO" mode button, then the "AUTO" LED rrr the viewfinder lights while the Auto button is
 pushed.

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NOTE: lf your camera has been set in "M.X" mode before you push "AUTO" button, the buzzer
indicates that the mode is changed into "AUTO" mode when you push the "AUTO" button.
lf your. camerqhas already been set in "AUTO" mode, the buzzer does not sound even,if you
push the AUTO mode button.
2. Focus the lens as previously described and set the aperture (f-stop) most favorable to the
subject by rotating the aperture setting ring until selested aperture number aligns with the
index line on the lens barrel.
3. When you push the Auto button, one more LED besides "AUTO" LED will light against the
appropriate number on the shutter speed scale to the left of the viewfinder to indicate:
a) Correct relative shutter speed.
b) Over-exposure condition.
c) Under-exposure condition.

r
O GIxl
dtRl
i r0m
l5m
1250
1125r

l 160130 ffi
| l!5
| 18 t:l
li,l L] )
l-1 1/25O sec. and AUTO position t-2 AUTO position, OVER exposure. . . .
close down lens aperture
t
10

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                                                 t-3
                                 AUTO position, 1/4 sec.  . . . . open up
                                                      lens aperture

  NOTE:
  1) The shutter speed relative to your aperture setting is indicated also by depressing the shutter
  release button half-way down. So, you can confirm again your shutter speed setting before
  releasing the shutter.
  2) Whenthe "LT" LED lights in "AUTO" mode, the shutter speed will be at between 2 seconds
  and 8 seconds.
  4. lf the "OVER" LED light, adjust (close-down) your aperture setting until an adequate shutter
  speed is controlled at 1/1000 second. (l-2)
  5. lf the indicated shutter speed is too slow (under 1/30 sec.) to stop action, adjust (open up)
  your apecture setting until an adeouate shutter speed is displayed to avoid unwanted camera
  movement, although correct exposure is obtained. (l-3)
  In case the indicate shutter speed is still too slow even  if the aperture is opened up completely,
    it is recommended to use cosina exclusive Flash Auto-160 or Auto 220.
  6. lf the "AUTO" mode button is once pushed, photographing with AUTO mode is continuously
  made as Long as the "M.X" mode button is not pushed.
  7. Recheck composition and focus before depressing the shutter release button all the way to
  complete the exposure.

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(7) General exposure information
The apertulg and shutter speed control the amount of light reaching the film's surface during
exposure. At a given shutter speed, turning the aperture setting ring from the smallest number
(largest aperture) to the largest number (smallest aperture) reduces the amount of light
reaching the film by one-half at each f-stop setting.
(8) Manual exposure
For maximum ereative freedom including specisl effect photography, your CT-7's electronic
qxposure system is designed for manual as well as automatic operation.
To use your camera in the manual mode:
1) Cock the shutter by winding the film advance lever as far as it will go in a counter-clockwise
direction (shutter speed readout is non-functional until the shutter is Cocked).
Push the M.X. mode button for manual operation, then the LED ot"125 X" ds well as "M" will
light. While the "M.X. button" is pushed, a third LED besides "125 X" and "M" will be flashing
(blinking).
The steady LED (1 25 X) indicates the manual shutter speed. The intermittent LED indicates the
correct shutter speed relative to the present aperture setting.
NOTE:
g) tl!l possible that only "M" and "125X" will light and no flashing LED will light. This means
thqlthe shutter speed already set will give correct exposure.
F) The manual shutter speed will remain unchanged atl/'125 second as long as any other
buttons (Auto, Up, Down) are not pushed.
2) The steady LFD is reset by pushing either Up or Down button (depending on your desired
shutter speed), if any other shutter speeds are desired.
The intermittent LED is moved up or down by adjusting the aperture setting (l-4).
a) whenever the M.X mode button is pushed, the buzzer will sound.
Q) The manual shutter.speed will remain unchanged as long as any buttons (Auto, M.X, Up,Down) are not touched.
c) When_ever either Up or Down button is pushed, the steady LED in the finder remains on forabout 1 0 seconds.
12

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d) In "M.X" mode each time the UP or DOWN gulton is toutched the shutter is adjosted to the
next speed and the buzzer also sounds.
e) Whbn the "LT" is set the shutter speed is limited at 2 seconds.
t)'Wnen any slower shutter speeds than 1/30 second are set, it is suggested to use tripod, cable-
release etc to avoid unwanted camera movement.
3) For correctly balanced exposures, both LED's should be match.ed (su.per-imposed) by
nianual adjustrirent of the shirtter speed setting (controlled by pushing either Up or Down
button) orihe aperture setting or both settings.(l-6/7)
4) Recheck composition and Tocus before depressing the shutter release button all the way to
complete the exposure.
5) Special Effects Photography. (l-8l9)
The'two-LED shutter speed'di-spiay is particularly useful for special effects photography. The
differential between aciual shutier-spebd ("steady" LED) and correct shutter speed ("intermitte.nt"
LED) can be manually predetermined and preset by manipulating the aperture setting ring and/
or U'P/DOWN buttons,'providing an instant readont in the viewfinder. Each shutter speed
increment equals one f-stop, sothe amount of under/over exposure can be quickly determined
and adjusted if necessary.

1 /250 t'-r .r 4M EVoosition,under 1/125it is recommendedsec., 1/8 sec toblinking'use t-5 sei.M oosition. . . meansCorrect2EVexposureunder Setat at1/60
flash gun sec. in M.X. mode

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(9) Exposure memory system
For greater exposure accuracy in diff icult back-lighted
situation, your CT-7 features a memory system which permits
closeup exposure settings to be "memorized"  until you have
returned to your original shooting viewpoint to your
exposure. To use the memory system:
1. Cock the shutter and push the "AUTO" mode button.
2. Compose your picture in the viewfinder and note your
shooting viewpoint.
3. Approach your key subject, so close as no back light
visible in viewfinder and set the appropriate aperture.
Then depress the Exposure memory lock button.
4. Return to your orriginal viewpoint ke€ping depress the
memory lock button.
5. Recompose the picture as before, check for sharp focus
and depress the shutter release button  f ully to capture your
pictu re.
NOTE:                                                                     Fig.12
Memory is automatically cancelled out when the shutter is
released.

(1O) Time exposures
To take satisfactory time exposure photographs  it is essential to mount your camera on a
sturdy tripod and use a cable release with a locking device to actuate the shutter. Your CT-7's
shutter will handle time exposures longer than 8 seconds by using this method.
 1. Cock the shutter and push the "M.X." button and then push either UP or DOWN button until "8" LED light.
2. Screw the cable release into the top of the shutter release button, which is threaded for this
pu rpose.

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www.butkus.us                                                                                   ENGLISH
 3' Determine the length of.the exposure required and depress the cable releaseto open the shutter and lock it in position.
4 Measure the exposure time and release the locking device to close the shutter.NOTE:
Time              photographs     exposure                        can be continued                                                   for as                                                    long^1s.you                                                                                   like providing you not push                                             ,,M.X.", ,,Up',                                                       ;rOOWtt".any     buttons          on key                 board le "AUTO",                                            and
                                                        l-1 0
                                             Operation mode is set at time-exposure
                                      mode
                                                                                            Fig. 13




         .1,_a                                   .

(11) Self-timer
The electronic self-timer has a delay of
approximately 10 seconds, allowing you ample  ti
time to release the shutter and get into the
 picture yourself. A built-in winking LED and an
emitting tone are provided the winking and
tone rate accelerate approximalely 2 seconds
before the shutter trips. To use the self-timer:
 1. Mount your CT-7 on a sturdy tripod, using
the screw socket provided.

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2. Compose the Picture through the 5. Self-timer is cancelled by either pushing
viewfiniler, visuaiizing the position you wish the exposure memory lock button or
to assume in the finished picture, then advance depreising the shutter release button half-
the film. way down.
3. Push the self-timer switch. NOTE:
4. Depress the shutter release button and take 1) When the self-timer is working, the
up ydur picture position remember that the oberition mode can not be changed even if
shuiter witt trip dpproximately 2 seconds tfiJseieCtor buttons (Auto or M.X.) are pushed'
after the winking frequency accelerates.
(12) Flash Photography
Voui camera is "X'rsynctironized at 1/125 th second, or at any manual speed setting slower
than 1 /125 th second, for flash photography.
1 ) To take flash pictures with the Cosina flash Auto 160 Gun'
t. fit tne flash uhit into the Hot-shoe, and switch the flash unit on. 2. When the flash unit is ready, the buzzer will sound.
3. The shutter speed is automatically set to'l /125 second. regardless of previous setting.
4. The "125X" LED in the viewfinder will be blinking slowly. ln tne auto mode, "AUtO'; [eO witt also blink and i-n the manual mode. The "M" LED blinks.
(1-11 /12)
5. ntiei tifing a flash picture, your CosinaCT-7 will be reset to the original setting until the
flash gun is fully charged again.
O. Wf'"en the fla-sn unit"is selon automatic mode, set the camera aperture to f4. (ASA 100)
7. Follow all the instructions/recommendations supplied with your flash unit.
2) To take flash pictures with any other make of flash.
i. Set the cameia in the manualhode by pushing the "M.X." button after cocking the s.hutter, tnsihutter speed is set at 1/1251h secoid'automatically. This is the correct speed for flash
photography.
2. f nitiif-Vorir flash unit in the hot-shoe, which has built-in "X" contact.
5i FoLr,c* 11.re instructions/recommenditions supplied with your paticular flash equipment for
c6rrect aperture settings and properly balanced flash exposures.

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NOTE:
a) Turn the switch of your flash unit to "OFF" position, when either the flash unit is installed
or is taken out from your camera.
b) Take no notice of the other flashing LED in the viewfinder.





 l-11 ln AUTO mode flash gun is charged up        l-12  In M.X. mode flash gun is charged up
 (13) Holding the Camera
1. Rest the camera on your left palm so you can turn
the lens focusing ring with your thumb and forefinger.
2. Use your right-hand to hold the camera lightly,
with your right forefinger resting lightly on the shutter
release button.
3. Press your left elbow lightly against your body and
look into the view-finder, steading the camera against
your face. The right arm should be relaxed while
holding the camera
NoteUse a tripod for long telephoto lenses or slower                         ___J Fis. 14
shutter speeds.

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(14) Focusing the Camera
Focusing  is taken from the small round area in the
centre of the view-finder screen. The inner circle is
a split imagerange-finder and is surrounded by a
microprism. The split-image range-finder divides the
image horiz.ontally. When the two halves are broughtinto exact alinement, correct focusing has been
obtained. The outer microprism conveys a broken,
shimmering image when out of focus and becomes
clear and sharp when correct focus is reached.
Focusing the Camera Cont.
Accessories, such as a rubber eye-cup, eye piece
correction lens holder, angle-finder and view-finder,                                                                                          Fig. 15magnifier can be used to assist focusing. Any
photographic shop will advise you corr-ecily on the
use of these items.





                                                                Fig. 16              Fig.17

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(15) Releasing the Shutter
 1) Unlock the shutter release lock.
 2) When you depress the shutter button, the
 aperture  is automatically stopped down and
 the shutter is released.
                                                                                          Fig. 18

(16) Rewinding the Film
To rewind the film after the last exposure:
 '1. Press the film rewind button until it is locked in the
depressed state.
2. Till up the rewind crank and turn in the direction                                       Fig. 19
of the arrow.
3. When the film is completely rewound the rewind
knob will suddenly turn very easily.
4. Pull the rewind knob aoainst the resistance to
open the back.
5. Take out the film.
6. Press the rewind knob down and close the back                                          Fig. 20cover.
Note
Avoid direct sunlight when unloading or loading the film. lf the film advance lever stops
midway and the film rewind button will not remain in the depressed state, then rewind the
film while keeping the rewind button depressed with your finger. Never open the back
cover until the film is completely rewound.

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(17) Photography with the Auto-Winder
With the Cosina automatic film-winder you are able to
take continuous or single f rame pictures at anylr shutter speed Attach the automatic winder to the
bottom of your Cosina CT'7 camera. The auto-winder
F is equippeil with a very convenient grip and angled
C release button. By keeping the release button
depressed a sequence of pictures, al a rate of two
frames per second can be shot. By depressing.the.
release'button and immediately releasing it, a single
frames may be taken, the film being automatically
wound on to prepared for the next picture.
Fig. 21
(18) Depth-of-Field
When the camera is focused at a certain distance
there is an area on either side of the set distance
which will also be in focus. This is called the "Depth
of Field".
The Depth of Field is affected by the following:-
'1. The smaller the aperture (as the aperture decreases
the "f" number increases eg. t/2 is a wide aperture,
and t/16 is a small aperture) the larger the depth of
f ield.
2. fhe longer the focused distance the larger thq. .
depth of f ield. The area in focus beyond the set distance
wil'l always be larger than the area in front of the Fig.22
focus distance.

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How To Know The Depth of Field Range
A depth of field scale is engraved on every lens when the camera is, for example, focused
on the subject at a distance of three metres, with the aperture set at f/8, the subject.located
within "B marks" on both sides of the datum line (approxrmately 2 metres and 5 metres) is
the depth of field area. Subjects within this distance will be in focus.
(19) Infrared Ray Mark
The short red line on one side of the datum mark is
the infrared ray mark, which is used to correct the
focusing when using infrared film and filters. The
infrared ray has a longer wave length than the
visible light range, therefore, the focusing is displaced
being indicated by a short red line.
 Infrared Photography
1 Attach an infrared filter to the camera.
2 Focus the lens using the red line.3 Set the exposure according to the description on                                          Fis. 23
the film and release the shutter.
 It is probably impossible to focus the camera
with the infrared  filter in position. Either focus with
the filter removed and then replace  it or use the
distance scale.


                                                                                                 Fig. 24

                                                                                          22

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