Film cameras
Pentax Spotmatic IIa User manual
User manual for Pentax Spotmatic IIa. 45 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Pentax
- Model / document
- Pentax Spotmatic IIa
- Document type
- User manual
- Language
- English
- Pages
- 45
- File size
- 4.5 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Page 4 · Read text
HONEYWELL PENTAX SPOTMATIC IIa Your Honeywell Pentax Spotmatic IIa is the most advanced photo- graphic tool on the market today. With its unique Strobo-Eye you have the capability for automatic elec- tronic flash . .. off camera or on ... bounced or direct ... from 2t to 401 . . . with a choice of f/stops. There is no comparable system The Super-Multi-Coated rakumar is an unbeatable lens. The Super- Multi-Coated Takumar reduces flare and boosts contrast to a degree far beyond what was previously possible in optical technology. It is a tougher coating than is available on any competitive lenses and results in pictures with more detail and richer colors than is possible with any other sys- tem at any price. The Spotmatic IIa itself is an outgrowth and refinement of the oiiginal Spotmatic which introduced through-the-lens metering to the world of photography. Its stopped-down metering system is the most accurate method for perfect exposure determination. It also automatically gives you a depth-of-field preview. It is an averaging system for the easiest and most dependable exposures in typical picture-taking situations. This metering system has been refined and improved each year in the Spot- matic to a degree of accuracy unmatched in the industry. The original Spotmatic was the most compact 35mm SLR made. The Spotmatic IIa retains that same traditional compactness and classic feel. It also is designed for use with the accessories from the Pentax system, in- cluding all of the superb Takumar lens ranging from the ultra-wide-angle 17mm Takumar up to the super-telephoto 1000mm Takumar. The Pentax system can grow with you as your interests develop in any direction. This is today's most advanced photographic system. Its unique auto- matic electronic flash capability, its superior Super-Multi-Coated Taku- mar and classical Pentax body make this a camera we are very proud to market. We are sure you will be just as proud to own it.View original page 4
Page 5 · Read text
Major working parts of the
crank A - Self-timer cocking lever H - Film rewind
B D-ring lug I Film rewind knob - -
sensor C - Shutter release J - Strobo-Eye
D - Shutter speed d-ial K - Exposure meter switch
E - Shutter speed index L - Preview lever
F - Hot shoe flash contact M - FP flash terminal
G Hot shoe N-X flash terminal -
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Specifications
Type
35mm single-lens reflex with built-in light meter.
Film and Picture Size
35mm film (20 or 30 exposures). 24mm x 36mm.
Standard Lenses
Su.per-Multi-Coated Takumar 50mm f lL.4 or 55mm
f /1.8 with fully automatic diaphragm. Filters and
lenshood size: 49mm. F,'quipped with diaphragm
preview lever which affords visual check of depth
of field. Distance scale: l9't (45cm) to infinity.
Sh utter
Focal plane shutter, with single non-rotating dial.
11000 sec. Film speed (ASA) setting Speeds: B, 1 -I dial and window on shutter speed dial. Built-in
self-timer releases shutter in 5-13 seconds. Shut.
ter curtains of special rubberized silk.
Warning Signal
The index of shutter speeds turns to red when the
shutter and film speed settings are off the meter's
measurability range. Refer to page 20.
Finder
Pentaprism finder with microprism Fresnel lens
for instant focusing; 0.88 x magnification with 50
mm lens and approximately life-size with 55mm
lens.
Focusing
Turn the distance scale ring until the subject image
on the ground glass comes into focus.
Reflex Mirror
Instant return type with special shock absorbers
for minimum vibration.
Film Advance
Ratchet-type rapid wind lever (for film advance
and shutter cocking). 10" pre-advancing and 160'
advancing angle.
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Lens Mount
42mm threaded lens mount.
" Gocked " lnd icator
A red disk appears in a small window alongside
the shutter release button when the shutter is
cocked, and blacks out when it is released.
Film Exposure Gounter
Automatic re-set type.
Flash Synchronization
Equipped with FP and X flash terminals. Elec-
tronic synchronization at 1/60 sec.
Exposure Meter
Built-in meter measures the brightness ef the
ground glass, and couples directly to shutter and
film speed settings. Film speed (ASA) settings
ranges from 20 to 3200 (LVl-28 for ASA-100 film
with standard lens). Meter is powered with a
mercury battery.
Film Rewind
Rapid rewind crank for speedy film take-up. Film
rewind release button on bottom of camera body
rotates while film is being rewound.
Strobo-Eye Electronic Flash Sensor
Built-in sensor measures reflected light from Stro-
bonar Film Speed (ASA) setting ranges from 25
to 400. Selection of f 7 stop setting gives depth-of-
field and/or range.
Strobo-Eye Sensor Measuring Angle
12 degrees.
Dimension
Width 5.6' (143mm) x height 3.66' (93mm) X
thickness 3.4'l (88mm).
Weight
1 lb. IL oz. (853 grams) with 50mm t lI.4 lens.
Body alone: 1 lb. 4 oz. (622 grams).
i!View original page 8Page 9 · Read text
Short operating course
A mercury battery for the light meter is packed separately. Please be
sure to insert it into the battery housing before operating the camera.
For battery insertion, refer to page 16.
1. SET FILM SPEED
Lift the outer ring of the shutter speed dial,
and rotate to set the ASA number of the
loaded film to the small red index which
appears alongside the figure 1. Then cock
the rapid wind lever.
2. SET SHUTTER SPEED
Turn the shutter speed dial and set the speed
you wish to use to the index. When out-
doors, set the speed at I/L25 sec. or faster,
depending upon the lighting. When indoors,
set it atI/30, or in its neighborhood. Change
the shutter speed later, when necessary.
(Refer to instruction 5, page 7.)
3. COMPOSE AND FOCUS
While viewing through the viewfinder, turn
the distance scale ring with your thumb and
index finger until you get the sharpest image
of your subject at the microprism center of
the f inder.
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4. TURN ON LIGHT METER SWITCH
Push up the switch button with your thumb.
Through the viewfinder, you will observe the
movement of the meter's needle on the right
side of the ground glass. Be sure to turn off
the meter's switch when not actually taking
readings.
5. ROTATE DIAPHRAGM RING
The needle moves up and down with the turn
of the diaphragm ring. When the needle rests
at the centre, you will get correct exposure.
If the needle does not come to the center no
matter how far you turn the diaphragm ring,
change the shutter speed. When the needle is
off center and close to the ( + ) mark, you will
get over-exposure: change the shutter speed
to a faster setting. If the needle is closer to
under-exposure:the ( - ) mark, you will getchange the shutter speed to a slower setting.
6. RELEASE SHUTTER
Hold your camera firmly and trip the shutter.
When the shutter is released, the meter switch
will automatically turn o{f, and the needle
will drop to the "OF'F" position below center.
The diaphragm will reopen to its full aperture
and the overall image will look brighter. Cock
the rapid wind lever for the next picture.
(When taking a series of pictures under the
same lighting conditions, it is not necessary
to repeat instructions 4 and 5.)
7. SET STROBO.EYE FOR ELECTRONIC
FLASH
Pull up the rewind knob. Set the ASA num-
ber of your film opposite the ASA index.
Turn the outer dial to position the ASA in-
dex opposite the desired range mark. Set
your lens to the f/stop indicated by the t/
stop index. Refer to page 18.View original page 10Page 11 · Read text
How to hold your camera
ln horizontal position A. Hold ln vertical position B. Hold In vertical position G. Hold
the camera firmly with your your camera tightly to your fore- your camera tightly to Your fore-
left hand, and draw your arm head with your left hand, and head with your left hand, raise
close to your body. draw your right arm close to your right arm and draw Your
your body. left arm to your body.
\
which are not sharp.are due to move-
ment of the camera. When you focus
with the camera held horizontally
(Position A), hold the lens barrel as
illustrated in photograph. Put the
camera on your left hand thumb and
little finger. Turn'the distance scale
ring with your thumb and index
finger. When holding the camera
vertically, some people release the
shutter with the thumb (Position B),
while others release it with the in-
dex finger (Position C). Position C
As a general rule, your camera should is more desirable for fast focusing
be held more firmly by the left hand and shooting. With the Honeywell
which does not release the shutter. Pentax, whether held vertically or
If you hold your camera with the horizontally, you see your subject
ena- right hand - the hand which releases image through the taking lens, the shutter it may cause camera bling you to compose, focus and shoot - movement. very often, pictures with a minimum of time and effort.
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Film loading
Avoid direct sunlight when loading your
film.
1. Open the'back by pulling out the
rewind knob until back cover snaps
open.
2. Place the film cassette into the cas-
sette chamber, and push back the re-
wind knob. Draw out the film leader
and insert it into slot of the take-up
spool.
3. Advance the film by alternately turn-
ing the rapid wind lever and releas-
ing the shutter until both sprockets
have properly engaged the film per-
forations. Close the back by pressing
it firmly. n 4. If the film is properly loaded, the re-
wind knob will turn counter-clock-
wise when you advance the film by
turning the rapid wind lever.
Setting ASA film speed Setting Strobo-Eye
The ASA film
speed rating of all
35mm films is
given in the data
sheet packed with
each roll of film.
The higher the
ASA number, the
more sensitive the When you have pulled out the rewind
film. Lift the out- knob to load your film, turn the inner
er ring of the shutter speed dial and dial until the ASA number of yourrotate it until the ASA number of film is opposite the ASA index.your film is opposite the red index Turn the outer dial until the ASAmark. index is opposite the range mark de-
Be sure to set your film speed on sired and note the f/stop reading in-
the shutter speed dial because the dicated by the f/stop index. A total
dial is connected to the exposure range of 3 f/stops is available for
meter system. each film speed.
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Film wind and rewind
Cock the rapid wind lever for
the first picture; the exposure
counter automatically turns to
'1', indicating that the first pic-
ture is ready to be taken.
2 After the final picture on the
roll (20 or 36 exposures) has been
taken, the rapid wind lever will
not turn all the way as you stroke
it. This indicates that the final
picture has been taken on your
film, and that the film must be
rewound. DON'T open the back
of the camera, or all exposed
frames will be ruined
3 Unfold the film rewind crank.
4 Depress the film rewind release
button. Turn the rewind crank
to rewind the film into the film
cassette. The film rewind crank
permits rewinding at a smooth,
,even rate. (Under some atmos-
pheric conditions, erratic or too
rapid rewinding will cause static
electricity marks on the film.)
You will feel the tension on the
rewind crank lessen as the leader
end of the film slips off the take-
up spool.
1 The first portions of the film can- Stop rewinding when you feel
not be used for picture taking as this happen. AVOID DIRECT
they have already been exposed SUNLIGHT WHEN'UNLOAD.
to light. Generally, two blank ex- ING YOUR FILM. (The rewind
posures should be made before release button will return to
taking your first pic[ure. Cock normal position as you load your
the rapid wind lever until it stops. next film and turn the rapid
Watch to see that the film rewind wind lever.)
knob automatically turns coun- 5 Pull out the film rewind knob ter-clockwise, indicating that the (the back will open automati-
film is moving from cassette to cally), and remove the film cas-
take-up spool. Trip the shutter. sette.
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Bright field focusing
1 You can start viewing and focusing
before and after cocking the rapid
wind lever. When the preview lever
is in "AUTO" (automatic) position,
and the meter is at "OFF", the dia-
except for the
*"??ft':i:H":ff1
2 Turn the distance scale ring until
your subject image is clearly in focus.
It is not always necessary for you to
view and focus with the diaphragm
fully open. In bright sunlight, you
can easily focus with diaphragm
closed to f/5.6 or t/8 and still ob-
serve the depth of field. It is easi-
€r, however, to focus with the dia-
phragm fully open as your subject
image is much brighter.
When the letters "MAN" appears
beside the lever, the lens is in manual
position; when "AUTO" appears, it
is in automatic position.
Microprism
Honeywell Pentax cameras have a
Fresnel lens with a microprism cen-
ter underneath the ground glass. As
you look through the finder, you will
see that the Fresnel lens consists of
many concentric rings which provide
the brightest possible image on the
ground glass.
The microprism is the center por-
tion of this diaphragm. When your
subject is in focus, the image in the
microprism will be sharp and per-
fectly clear. If your subject is not
in focus, the microprism will break
the image up into many small dots,
much like an engraver's screen. You
can focus your subject on any por-
tion of the ground glass.
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Automatic diaphragffi
When the preview lever is in "AU-
TO" (automatic) position, and the
exposure meter is turned to "OFF",
the fully automatic diaphragm is at
its largest aperture at all times, ex-
cept for the instant of exposure, no
matter what aperture is set on the
diaphragm ring. When you release
the shutter, the diaphragm automat-
ically stops down to the predeter-
mined aperture and the shutter cur-
tains start traveling instantly. When
the exposure is completed, the dia-
phragm reopens to maximum aper-
ture completely automatically and
you are ready to compose, focus and
shoot your next pictures. If you wish
to visually check exact depth-of-field
before making the exposure, move the
preview lever to "MAI{" (manual)
OUT OF FOCUS position. This stops the diaphragm
to the aperture selected and shows
you exactly how much depth-of-field
will appear in your picture. The pre-
view lever may be moved back to
"AUTO" (automatic) position before
or after making your exposure, or, if
you are making pictures in bright
sunlight, it may be left in manual
position, which permits a constant
check of depth of field.
*When the exPosure meter switch is
turned to the "on" Position, the lens
diaphragm changes from the auto-
matic to manual position euen though
the preuiew leuer is in the " AU TO"
( automatic) position. When the shut'
ter is released, the lens diaPhragm
utill automatically return to its au-
tomatic position if the leaer is set
IN FOCUS on " AUTO". www.butkus.us
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Shutter
Turn the shutter speed dial clock- speed may be set either before or
wise or counter-clockwise to the after cocking the rapid wind lever.
shutter speed desired. The shutter As you cock the shutter by turning
the rapid wind lever, the "cocked"
indicator turns to red showing that
the shutter is cocked
The indicator window blacks out
as you trip the shutter button. For
use of the X setting on the shutter
speed dial, refer to page 17.
With the shutter speed dial set on
B (bulb), the shutter will stay open
as long as you depress the shutter
button. As you release your finger
from the shutter button, the shutter
closes. When a long exposure is
desired while using the B setting,
attach a shutter release cable with a
locking device to the shutter button.
This will permit a "Time" exposure.
Cautions
2 To protect the shutter mechan-
support your camera rigidly or ism, trip the shutter release be- - use a tripod to prevent movement fore putting the camera out of
of your camera. use for any extended period.
Depth-of-field guide
the range on the distance scale ring
covered within the figure 8 on the
depth-of-field guide indicates the
If you want to know how great the area in focus at the lens opening.
depth of field is at a certain aper- You will note from the depth-of-field
ture, look at the depth-of-field guide. guide in the photograph that the
In the above photograph, the distance range from approximately 10 to 25
scale is set at 15 feet . . . the lens is feet is in focus. Note that as the lens
focused on a subject 15 feet away. apertures chatrg€, the effective depth
The calibrations on each side of the of field also changes. For the depth
distance index correspond to the of fields at different apertures and
diaphragm setting and indicate the distances, refer to page 14.
range of in-focus distance for differ- f Depth of fi.eld is the range between the Ient lens apertures. For example, if I nearest and farthest distances which I
the lens opening of f/8 is to be used, L are in focus at different lens apertures. J
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Range of light measurement
The exposure meter of the Spotmatic IIa measures the brightness of the
ground glass. Therefore, the meter should be turned on after you have
focused your subject on the ground glass. The following table shows the
range of the meter's light measurement, and should not be interpreted as
the camera's total range of f/stop-shutter speed combinations. As you will
note from the table below, with an ASA100 film, you may use any shut-
ter speed from 1 sec. to 1/1000 sec. in combination with any aperture that
will bring the meter needle to the midpoint in the viewfinder. The total
range of the aperture settings is, of course, determined by the minimum
and maximum apertures of the lens being used. For example, with the
50mm f/1.4 lens and ASA100 film, an aperture frcm f./1.4 (the maximum
aperture of this lens) to f/16 (the minimum aperture) may be used with
any shutter speed from 1 sec. to 1/1000 sec. that will bring the meter needle
to midpoint.
The area A indicates the reading range of the meter. The area B indicates that although the shutter speed index is
black and the meter needle moves, the meter is NOT operating properly.
When the meter needle is centered with the shutter speed dial set at B using ASA 2O-5O films, this
indicates that the exact shutter sleed reeuired is Z seconds. Please erlose lour ficture forZ seconds.
t5View original page 18Page 19 · Read text
Mercury battery
How to check it
1. Set the shutter speed dial to B
(bulb) position.
2. Turn the ASA dial to ASA 100.
3, Push the meter switch to " on "
position.
Look at the meter's needle through
the viewfinder. If the needle rapidly
drops, the meter battery has sufficient
capacity; if it does not, replace the
mercury battery.
How to replace it
Open the battery housing cover on the
bottom cover plate with a coin. Re-
move old battery and insert new bat-
tery with ( + ) side toward the toP of
the camera. For replacement, use
Mallory PX-400 or RM-400-R or equiv-
alent.
CAUTION: The mercury battery is
like a phonograph record. It can be
damaged by skin acids. Handle by the
edges with a dry cloth only. Be sure
the battery is cleaned with the cloth
before insertion into the camera. The
battery is not rechargeable. ffi
DANGER ! A serious accident has been reported of a vnall child uho has put a melcilr!
battery into his mouth and has been hosPitali?pd for serious gripes and stornach inflamma-
tion. Please aluays keep a nrercury battery from the reach of small children.
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Flash synch ronization
The Spotmatic IIa has FP and X terminals at the front of the camera body,
and a separate X flash contact on the built-in hot shoe. The table below shows
which flash contact, which shutter speed and which flash bulb may be com-
bined for maximum lamp efficiency. Unless these combinations are rigidly
followed, there will be a failure in flash synchronization. Note the .,X,'
setting is exactly at the 60 marked on the speed dial. This indicates the
highest shutter speed at which electronic flash units may be used.
The hot shoe X flash contact may be used with hot shoe strobonars and
Auto/Strobonars or any other electronic flash or flash gun that fits the
built-in hot shoe of the Spotmatic IIa.
\ SHUTTER
1 1 1 1 1 \ SPEED
1 FLASH \ 1m0 m0- 1m 1w 60. m- 15 1T- 1T 1T TERMINAL \ x
FP ffi
X re
ffi
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Strobo-eye remote sensor
The Spotmatic IIa has the
Strobo-Eye remote sensor built
into the camera body. The
sensor measures the light re-
flected from the subject auto-
matically and turns the Stro-
bonar off at precisely the right
time for perfect exposures.
The Remote Auto/Strobonar
may be used on or off camera
for dramatic lighting effects
or subtle bounce lighting.
'1_. To connect the camera and Remote Auto/Strobonar, connect a PC to
standard plug shutter cord to the outlet on the Auto/Strobonar and to
the X-sync terminal on the camera. The Auto/Strobonar can be used
mounted on the camera or hand held to get perfect exposures automa-
tically. If a hot shoe Remote Auto/Strobonar is mounted on camera
hot shoe, no shutter cord is required. Set shutter speed dial to X.
2. To set film speed, pull up on the rewind knob (I) when loading the
film and turn the inner dial until the ASA index (Z) is opposite the
ASA number of the film you are using. Any film from ASA 25 (DIN
15) to ASA 400 (DIN 27) may be selected.
3. To select f/stop, turn the outer dial until the ASA index (Z) is oppo-
site the range indexes (AA) and note the f/stop readings indicated by
the f/stop index (X) at each mark. For each film speed, a total range
of 3 different f/stops a{e available with automatic flash.
EXAMPLE: With the film speed set at ASA 25 (DIN 15), the ASA index
set at A, the f/stop selected would be f /2. Correspondingly, if the ASA
f /4. index were set to O, the f/stop would be f /2.8, and if set to E, would be
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4. Set the camera lens to the selected f/stop. You may now creatively
use your Remote Auto/Strobonar for on or off camera lighting with
assurance of perfect exposure automatically within the distance range
of your selected f/stop.
5. To determine range, turn the exposure dial on the back of the Remote
Auto/Strobonar until the ASA value of the film you are using is op-
posite the ASA index. Maximum range is indicated opposite your select-
ed stop. Minimum range is about 1/10 of the maximum range.
6. For film speeds not on the dial, set a film speed on the dial that is a
whole multiple of the film you are using (see step 2). Then choose a
stop in the normal manner (see step 3). If you are using a film that
is double the setting on the dial, then decrease the aperture of the lens
one full f/stop from the f/stop indicated on the Strobonar-Eye dial.
EXAMPLE: If you desire to use
ASA 800 (DIN 30) film, set the
Strobo-Eye ASA index (Z) to ASA
400 (DIN 27). Turn outer dial
until the ASA index is opposite
range index A. Observe that f /8
appears opposite the f/stop index.
Now, decrease lens aperture on
your camera one stop to f/Il.
...i.i.:.....
.ilil.ili.. If you are using ASA 1600 (DIN
.li.i.i.il. 33), set Strobo-Eye ASA index to
i..iii,jii.i 400, select your desired f/stop and
ilii.i.ilili decrease the camera lens aperture
I,:i:|ii:i two full stops.
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lmportant notes
Always keep the meter switched off when
not actually taking readings. Leaving the
meter switched on witl rapidly exhaust the
battery. It is also necessary to keep the
meter switched off when mounting a Super-
Takumar or SMC Takumar lens on the
Spotmatic IIa carnera body. If it is
switched oo, the tip of the automatic
diaphragm release pin of the lens will hit
the pin release plate inside the camera
body and it may get damaged.
When removing the Super-Multi-Coated
Takumar 50mm f /1.4, lens from the
camera body, do not place it on
its threaded end without the rear
mount cap in place, or you will
scratch its rear element lens.
When the index of the shutter speeds 3
turns to red, it indicates that the
shutter and film speed settings are
off the meter's measurability range.
Change the shutter speed setting
to a faster. or slower setting.
Refer to page 15.
When the meter is the switched oD, the
lens (any Super-Takumar or SMC Takumar
lens) is in its manual position even when
the diaphragm preview lever is in "ALJTO"
(automatic) position. When the meter is
switched off manually, or automatically
after shutter release, the lens returns
to its automatic position when it is set
in "ALJTO" position.
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Self-timer
Depending upon how far down you turn the
self-timer cocking lever O, it will release the
shutter in 5-13 seconds. When operating the
self-timer, always' depress the self-timer re-
lease button @ to release the shutter. Do
not depress the shutter button . . . it will im-
mediately release the shutter without delayed
action. The self-timer cocking lever should
be turned down at least 90' or the release
button will not operate.
lntra-red photography
If you intend to take infra-red photographs, r(R" remember to use the small index mark-
ed on the depth-of-field guide. Some of the
Takumar lenses, however, like the above pic-
ture of Super-Takumar 50mm f./I.4, do not
have the rtR" mark. The index is just a short
orange line.
First, focus your lens on your subject. Determine the lens to subject
distance from the distance scale. Then match your lens to subject ((R" distance to the mark by turning the distance scale accordingly.
For instance, if your subject is in focus at infinity, turn the distance ((R" ring and move the infinity (-) mark to the index. ttR" index marking on the Takumar lenses is based on the lens The
setting at infinity.
How to make deliberate double exposure
For deliberate double exposures, make the first exposure in the normal way.
Then tighten the film by turning the iewind knob O, and keep hold of the
rewind knob. Depress the film rewind release button @ and cock the rapid
wind lever. This tensions the shutter without advancing the film. Finally,
release the shutter to make the second exposure. Then make one blank
exposure, before taking the next picture, to avoid overlapping.
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INTERCHANGEABLE LENSES
The Honeywell Pentax offers many Regardless of the lens selected for
interchangeable lenses in a wide var- your Honeywell Pentax, there is
iety of focal lengths, all of which are never need for an accessory view-
highly respected by both professional finder, ordinarily required for range-
cameras.t and amateur photographers for their finder type fine resolution. The photographic
coverage of the various Takumar When interchanging lenses, hold the
il lenses is illustrated on page 24. With lens by the distance scale ring. When
focal length longer than 55mm, the attaching a lens, filter, or lenshood,
subject image is seen through the do not screw it too tightly, ES you
viewfinder larger than its life size. may find it difficult to remove.
FIXED FOCUSING SETTING
Because of the considerable depth of (marked with * ) have a fixed focus
field of wide-angle lenses, you can use mark. Just align with the index the
them as fixed focus lens if the dia- orange-colored figures of the dia-
phragm and distance scales are set phragm and distance scales, and the
properly. For your convenience, the lens will be in fixed focus from fore-
Super-Takumar and SMC Takumar ground to infinity. You'll find this ex-
lenses shown on pages 25 and 26 tremely convenient for fast shooting.
RESOLVING POWER OF TAKUMAR LENSES
Resolving power of all Takumar Use a slow-speed fine grain film.
lenses is factory-tested by skilled op- Generally, high spbed films are grainy
tical engineers. There are three types and are not suitable for resolution
of tests: microscopic aerial test, pro- test. Support your camera on a good
jection test and photographed film tripod. Use a shutter release cable
test. Resolving power of a lens shown to prevent camera movement. The
by lpm (lines per mm) varies depend- definition of the picture on the nega-
ing upon the method of resolution tive film may decrease if exposure
test. Takumar lenses have been tested and developing time are not proper.
for resolving power to conform to Time your exposure and develop-
Asahi Optical Company standards ment correctly.
which are higher than those set by If you do your own developing and JIS (Japan In{ustrial Standards). All enlarging, see that your enlarger uses Takumar'lensbS' bear the seal of the a fine quality enlarger lens. If it is Japan Camera Inspection Institute not of a fine quality, your pictures which insures the highest standards can never be sharp no matter what of performance. superb lenses are mounted on your
camera. Usually, the diaphragm of
When testing your lens perform- the enlarger should be closed down
ancg... to t/8 or f /II.
23View original page 26From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
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