Canon III-A User Manual
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Directions f or usingii; -
35mm CANON cameras!;
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ll-D
lll-A
IV-S2
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Introduction
Your CANON CAMERA and CANON LENS are fhe products of the highest
grade of precision engineering and optical research.
The camera is strong, compact and simple to operate. As it is a precision
instrument, it is advisable that you understand how to operate it by studying
the directions carefully.
The superior resolving power of the CANON LENS will produce negatives of
extreme sharpness,- the lens will resolve to a higher degree than the emulsion
of modern high-grade film.
■iir USE YOUR CAMERA INTELLIGENTLY
☆ LEARN TO USE IT IN EVERY POSSIBLE WAY
☆ TREAT IT WITH RESPECT
Although fully guaranteed for five (5) years, it will, with care, last you a
lifetime and give you photographs you will be proud to own.
Lens Aperture Scale lO
Lens Focusing Lever /3
-Distance Seale It
Depth of Focus Scale 12
Rangefinder Window
Range~View Finder Window
Base Cover ■
Flash Unit Mounting
Bracket 3t
Terminai 3t
Bye for Neck Strap
Range-Vievr Finder
Magnification Selector iS
Rewinding Knob
Figures following the descriptions indicate pages where detail explanations are given.
Eyepiece Ì3
Accessory Clip n
Slow Shutter Speed Diet 9
Reversing Lever 27
B^posure Counting Dial 25
-------
Winding Knob 7
Im Speed Indicator 2i !
Shutter Release Button
High Shutter Speed Diai^
HOW TO OPERATE THE CANON CAMERA........................................................................................................................ 7-20
High Shutter Speed Dial................................................................................................................................................... 8
Slow Shutter Speed Dial................................................................................................................................................... 9
Time Exposures Longer than One Second................................................................................................................ 9
Lens Aperture Scale..........................................................................................................................................................10
Distance Scale.....................................................................................................................................................................11
Depth of Focus Scale........................................................................................................................................................12
Focusing................................................................................................................................................................................13
Magnification Selector.....................................................................................................................................................15
Accessory Clip......................................................................................................................................................................17
Exposure and Composition...........................................................................................................................................18
Double Exposures..............................................................................................................................................................20
page
3
t’%:
LOADING AND UNLOADING CAMERA .
Loading.............................................................................................................................................................................21
Unloading.........................................................................................................................................................................27
III.
HOW TO CHANGE YOUR CANON LENSES . |...................................................................................................................28-29
Dismounting . . ................................................................................................................................... .... 28
Mounting..........................................................................................................................................................................29
IV.
BUILT-IN FLASH SYNCHRONIZER.........................................................................................................................................30-33
High Shutter Speed Synchronization....................................................................................................................31
Speedlight Synchronization......................................................................................................................................32
Slow Shutter Speed Synchronization....................................................................................................................33
V,
EVOLUTION OF CANON CAMERAS
VI.
CANON ACCESSORIES...............................................................................................................................................................40-42
........................
...................................................................>..............................................................
.........................................................................................................21-27
34-40
- ’.^;PracHc^j,tIiese steps ihq^ughly/before loading film
O ■ Remov'e-th4-Lens Cep, ’
t
f ' •■
’’ © ’'Puil oi/f^the^'éiis;and. Lock it, if coHap
'sible iÿpeKSOimiîi t : T.9*8i,f : 3:5).
S«e p<9* 7
Set the,Len,s-;Aperfure Scale (f-stop).-
"■‘if'i---’
. “lîJ S*9 p9g* lO T.
page 7
0' Foe Js -by'ro'ta’tirig .thé Focusing Lever. ‘
Jf,
S#e p«p« 13
HOW TO OPERATE THE
CANON CAMERA
Read the directions carefully. You can learn how
to use your camera in a few minutes.
Remove the Lens Cap.
If you have a eollopsible lens (CANON LENS
50mm f:1.9 or f:3.5) pull out the lens to the
mork on the barrel and lock by turning os
illustrated. The Standard lens (CANON LENS
50mm f:1.8) on the Model Ill-A and IV-S ca
meras is non-collapsible.
See that the Reversing Lover is at the "A"
3.
position (Advance). Then turn the Film Wind
ing Knob one complete turn when it will stop.
Each time the Film Winding Knob is turned
the Exposure Counting Dial automatically
registers the next number.
'N0TB'; 'r/i/r turned io. one Oy eec^F^e i
NOTE; Afwtjri vind iAe Film Winding Knob ¡uti hofor»
t new film *nd ree^y fa imei#
ex»iure> (see paffe 3A),
tiifng'e pfctune. Do not.feeve II <*ound)ov»r
long ‘^Hodt u ibit in *y tree ken tAe ShuHorSpring tnd mty cause ecc/dente/ exposure If
tne SAutier Pefeese Button Is pressed by mlsIeAe. -
HIGH SHUTTER SPEED DIAL On the Model ll-D, Ill-A and 1V-S2 cameras there are two
Shutter Speed Dials.
High: for speeds between 1/25-1/1000 second (1/500 on ll-D) & B (Bulb).
Slow: for speeds between 1/25-1 second & T (Time).
INTERMEDIATE SPEEDS CANNOT BE USED
Correct exposures are best obtained with an exposure
meter or by following the instructions supplied with the
film.
To operate the camera at any of the speeds shown on the
High Shutter Speed Dial, first turn the Film Winding Knob,
The Shutter Speed Dial will not select the desired speed
unless this has been done. Raise the dial with thumb and
forefinger and turn until the speed required is exactly
opposite the Index Mark and let the dial fall.
For l/IOOO sec., the dial drops only half the distance of
the other speeds.
Press the Shutter Release Button and the Shutter operates
at the selected speed.
NOT£i When, (Ae High Shuttar Sptt^y,Dfil. /s usW.tAc Slow
ShuHor SpooJ Dial must ¿e Vet <t 25'(//29 see.),
SLOW SHUTTER SPEED DIAL The Slow Shutter
Speed Dial will record speeds between 1/25-1 sec.
and T (Time) by turning the dial to the correct
position so that the required speed registers uppermost
opposite the index mark. Be sure that you have first
turned the Film Winding Knob one complete turn and
the High Shutter Speed Dial is set at 25-1 (1/25 sec.)
NOTE: Sp*w/i InUrmediatw hihfnen. thti 35, ijs, tjk •nd
I see, mey ¿e oStefnei/; 6y jtUinU tAe d/»f to (Ae
esttmated pailt/on. medt /s evpfe/oWo^'page
33.
TIME EXPOSURES LONGER THAN ONE SECOND A time exposure may be obtained by using the
B (Bulb) position on the High Shutter Speed Dial. The shutter remains open from the time you
press the Shutter Release Button until the pressure is removed. The use of a Cable Release
is recommended for this purpose.
You may also obtain a time exposure with the Slow Shutter Speed Dial at T (Time). Press the
Shutter Release Button and the shutter will open and remain open until you turn the Slow
Shutter Speed Dial to 1 or until you turn the Film Winding Knob. (The latter method is
9
recommended only for microphotography :etc.). The shutter will close only when either of
the two methods given above are used.
NOTE: For speed slower than if25 sec. a solid tripod is essential and preferably a Canon Camera Holder.
IMPORTANT: When using Flash Unit with the Model IV-S2 camera and making exposures with the High
Shutter Speed Dial precise flash amd speedlight synchronization will be affected if the Slow Shutter
Speed Dial is not set at 25. See pages 30-33.
LENS APERTURE SCALE The Lens Aperture controls the amount of light entering the lens
and also'the Depth of Focus. Set the Lens Aperture (f’Stop) by turning the Aperture Scale
(knurled ring, see illustration) to the proper position. This is best determined with an exposure
meter^or following^the instructions given with the film.
Index 'Made
NOTE: The more light you want to entet the lens^ the larger must
be the Lens Aperture* Rotate the Knurled Ring while
looking into the lens and see the movement of the
diaphragm.
10
Knurld Ring
When the Lens Aperture is closed by one stop, the amount of light entering the lens is
decreased by one half; two stops, by one quarter and so on. Therefore you should adjust the
Lens Aperture in conjunction with your shutter speed. Suppose your exposure meter indi
cates a speed of 1/200 sec. at f:5.6. If you want to expose for a slower speed, say 1/100
sec., than you must close down the Lens Aperture to f:8. In other words, as you have
doubled the time of the shutter opening, you must reduce the amount of light entering the
lens by half to obtain the correct exposure.
The table below gives you the relation between the Lens Aperture and the relative time of
exposure for Canon Camera.
Lens Aperture
Relative Exposure Time
DISTANCE SCALE When accurate focus (see page 13) has been made on any object,
the actual distance from the plane of the film to the object is shown by the Distance Scale
(see next page) which is marked from 3.5 to infinity (os) in feet. Lenses with meter scales
are provided when specially ordered.
1.8 2.0 2.8 3.5 4.0 5.6 8.0 1 1 16
0.8 1 2 3 4 8 16 32 64
11
Knurld
Ring
DEPTH OF FOCUS SCALE See Illustration below. A little study will show how to plan
the exposure you want. The Distance Scale and the Depth of Focus Scale are used together.
Index Mark
Focusing Ring
Distance Scale
Distance Index Mark
Depth of Focus Scale
Depth of Focus means the range of objects
which will be in focus on your film. This range
varies with the distance of the object of sharp
focus and the Lens Aperture (see page 11).
It extends from in front of the object of sharp
focus to beyond it. The greater the Lens
Aperture, the less will be the Depth of Focus.
Depth of Focus also diminishes in proportion
to decrease in distance the object of sharp
focus is from the film plane.
The illustration shows the Lens Aperture at
f:1.8 and the Distance Scale at 25 feet. An
object at 25 ft is in sharp focus. The Depth of
Focus Scale shows that the nearest object also
in focus is approximately 21 feet and the
farthest object in focus is approximately 30
feet. If the Lens Aperture Scale is set at
fill the object in focus will extend from
12 feet to infinity (o>).
12
FOCUSING It is recommended that the camera be held
as illustrated. It should rest comfortably on the heel of
the left hand and be balanced by the right hand. Hold
the camera to your cheek to keep it steady while sighting
through the Range-View Finder Eyepiece. Manipulate the
Focusing Lever with either your left or right forefinger
whichever is more comfortable. More precise focusing is
possible by setting the Magnification Selector at 1.5x
(see page 17) and rotating the Milled Focusing Ring as
shown in lower illustration.
'NOTÉ: Tkf Focusing L»y»r is riioascd from Üto infinity .
Catch on thm f<ani by daprassing tha knob ind turning.
13
Woe
i-V'-'
^^¡iSiSÈmiswsi
M M
Out of focus
As you look through the Range-View Finder Eyepiece and rotate the Focusing Lever you will
see two images of the same object. The images will move apart or together as the lever
is rotated. Turn the Focusing Lever until the two images of the object on which you are
focusing coincide exactly. Your lens is now in sharp focus on the object. At the same time
all objects in the range shown on the Depth of Focus Scale will also be in focus at the
f-stop you select for the exposure.
\4
In correct focus
MAGNIFICATION SELECTOR Thcrtt ar* thr«* positions for th* Moanlficotlon Saloctor; F,
lx, and I.Sx. When really sharp foeyslng is required, turn the Selector to 1.5x when the ob
ject will be magnified 1.5 times. Remember however, the actual image recorded on the film
will be the picture seen at F position of the Selector.
The lx position corresponds to the image seen and recorded by any CANON LENS with a
focal length of 100 mm. The 1.5x position shows the image for any CANON LENS of focal
length of 135 mm.
A certain difference between the picture seen through the Range-View Finder Eyepiece and
the image recorded by the lens is inevitable. For normal photography the difference is
immaterial being so slight. But for certain''work compensation should be allowed.
The diagram shows the difference, or parallax, when the Selector is at F for a 50 mm lens.
FitIJ’of-View of tho
lens (so mm).
FioU-of-Viow of tho
findor S.S ft.
FI»ld-of-Viow of th»
findor »1 12 ft.
Flold-of-Vi»w of tho
findor at Infinity.
15
Th* dlogrom below show» the parallax when the Selector is set at lx for CANON LENSES
with focal length of.100 mm. Note that when the ob|ect distance is less than 13 feet
a special viewfinder with parallax compensation adjustment should be used.'
16
Firntd-of^Vimw of tho
Imns (;0O mmy
FlwId-of-Viow of thm
ffntior «t 5 fi*
FiolJ^oFVlow of tho
findor si IS ft.
Fistd-oFVisw of iho
findof at Infinity
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