Film cameras
Mamiya DSX User manual
User manual for Mamiya DSX. 37 pages in English. Read the original PDF, download or print a copy without registration.
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Document details
- Brand
- Mamiya
- Model / document
- Mamiya DSX
- Document type
- User manual
- Language
- English
- Pages
- 37
- File size
- 3.3 MB
- Category
- Film cameras
- Document date
- Not specified in catalog
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Page 6 · Read text
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SPECIFICATIONS: momiyo/sekor DSX1000and DSX500
C A M E R A T Y P E : S H U T T E R :
35mm Single Lens Reflex with two separate DSX 1000: Focal plane with speeds from 1 to 1/
behind-the-lens,f ull aperture metering systems; 1000 second and B for time exposures.
one for averaged readings and one for spot Built-in variable delay self-timer.(DSX 1000 only)
r e a d i n g s . DSX 500: Focal plane with speeds from 1 to 1/ II
FILM SIZE AND CAPACITY: 500 second and B for time exposures.
Perforated 35mm film in standard 20 or 36 ex- E X P O S U R EC d T T N O T :
posure cartridges. Two separate metering systems with one CdS
STANDARD AUTOMATIC LENSES: cell positioned on the back of the reflex mirror
momiyo/sekor SX 55 mm t/1.4 (spot system)and one CdS cell located on each
7 elements in 5 groups side of the viewfinder eyepiece in the penta-
Angle of view: 43' prism housing (averagingsystem).
Accessory size: 52 mm Both metering systems are cross coupled to the
momiyo/sekor SX 55mm f/1.8 shutter speed control, film speed dial, and
" 6 elements in 5 groups diaphragm mechanism on all automatic SX
Angle of view: 43' lenses. This dual system accurately measures
Accessory size: 52mm light at full aperture with momiyo/sekor SX
momiyo/sekor SX 50 mm t/2 lenses. With other universalthread mount lenses,
6'elements in 4 groups \ the dual metering systems will operate in the
Angle of view: 47' stop-down mode.
Accessory size: 52mm , The film advance lever switches the metering
L E N S M O U N T : system on and actuates the diaphragm mecha-
Universal thread mount (42mm) with locking nism on all automatic SX lenses. The Spot/
p i n . Averaging selector switch on the camera bodyView original page 6Page 7 · Read text
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allows the use of either system of exposure F I L M A D V A N C E :
calculation. Ratchet type film advance lever transports film,
cocks shutter, and advances exposure counter
in a single stroke (160')orby a number of shorterM E T E R S E N S I T I V I T Y :
strokes. ASA 25 to 3200 DIN 15 to 36
E X P O S U R EC O U N T E R :V I E W F I N D E R :
Pentaprism type with micro-diaprism center spot Progressive type, reads from "S" (start) to 36.
on Fresnel screen for rapid focusing. Brackets Counter automatically resets to "S" when film
compartment door is opened. visible in finder indicate location of spot meter
reading area (60/oof fie.ld). Pointer and "S" and D I M E N S I O N S :
, "A" symbols visible in finder indicate whether Width : 5 31/32 in. (151.Smm)
the spot or averaging meter system is being Height : 3 3/4 in. (95 mm)
used. Exposure needle and reference points Thickness: With 55mm f/1.4 lens 3 61/64 in.
(100.5mm) indicate necessary exposure adjustments.
ith 55mm f/1.8 lens 3 25/32 in.FLASH SYNCHRON IZATION:
(96mm) Two separate flash contacts are provided,
With 50mm f/2 leni:3 3/4in. (95mm) marked "FP" and "X". Proper selection of
terminals allows correct synchronizationfor all W E I G H T
types of flash pictures. With 55mm f/1.4 lens: 3314/16 oz. (9609)
A built-in"hot shoe" accessorybracket is located With 55mm f/1.8 lens:32 2/16 oz. (9109)
atop the viewfinder, for use with cordless flash With 50mm t/2lens: 31 3/16 oz. (8859)
units. (DSX 1000 only)
R E F L E XM I R R O R : Note: U.S. Patent No. 3612703 "Combined spot and
Instant return type averaged photometric system."View original page 7Page 8 · Read text
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SHORTCOURSEOF INSTRUCTIONS
Insert an Eveready 5-76 silver oxide
battery (or equivalent)
Load the film.
Pull up the rewind knob to open the film
compartment door, drop in the film cartridge
and push down the knob, turning it until it
drops into place. Insert the end of the film
leader into the film take-up spool, making
sure the perforations along the film edge
are hooked onto the teeth of the sprocket.
Close the film compartment door and ad-
vance the film and press the shutter button
repeatedly until the number "1" appears in
the Exposure Counter Window.View original page 8Page 9 · Read text
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Set the film speed. Focus on your subject
Pull up the outer ring of the film speed dial by rotating the focusing ring until the
and turn it until the ASA/DlN number (or re- image in the center of the viewfinder
presentativereference mark) of the f ilm you screen appears sharp.
are using appears in the window opposite
the white index mark.
Turn on the exposure meter
by pulling the Film Advance Lever away
Set the shutter speed. from the camera body approximately1/2
When outdoors in bright or hazy sunlight,l/ i n c h .
125 second is generally suitable for most
photographs.When indoorsin a well lit room
1/60 second should be sufficientto capture Set the exposure.
your subject, depending upon the film you Center the exposure meter needle be-
a r e u s r n g . tween the brackets in the viewfinder by
I turning the Aperture Ring or the Shutter
b S p e e d D i a l .
Set the "Spot/Average" Switch
to "A" (average) for general photography,
or "S" when your subject is strongly back Compose your picture and Press
o r s i d e l i t . the shutter release button.View original page 9Page 11 · Read text
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INSERTINGTHE BATTERYI
Open the battery compartment door on the base of the camera by
turningthe cover counterclockwisewith your thumb until the white dot
aligns with the letter 'ro " (open).
Clean the battery contacts with a clean, dry cloth to assure they are
free of oil or dust which may interfere with making positive contact.
With the (+) sign facing you, insert the battery and replace the cover,
tighteningit with the thumb, turning it a one-quarterturn in the opposite
direction of the arrow.View original page 11Page 12 · Read text
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LOADINGTHE FILM
A. Open the film compartment door hy pulling up the Rewind Knob.
Drop the film cartridge into the compartment and rotate the Rewind
Knob until it drops down and locks the cartridge in place.
B. Insert the film leader into one of the slots in the Take-up Spool.
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C. Slowly advance the film by stroking the Film Advance Lever as far
to the right as it will go. lf the lever stops midway, press the Shutter
Release Button to free it for another stroke. Be sure that the holes
on both sides of the film are caught by the teeth on the Film Trans-
port Sprockets.
NOTE: The film must pass under the Take-up Spool when advanced.
D. Gently turn the Rewind Knob clockwise to take up the slack in the
f i l m .
E. Close the Film Compartment Door and advance the film several
times until the number "1" appears in the Exposure Counter Window.
As the film is advanced through the camera the knob will turn in a
counterclockwisedirection,indicatingthe film is advancingproperly.
As the film is advanced the shutter will be cocked automatically.Your
camera is now loaded and ready to go.
N O T E : A V O I D D I R E C T L I G H T W H E N L O A D I N G A N D U N L O A D I N G
T H E F I L M .
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SETTING THE FILM SPEED
Lift the outer ring of the Shutter Speed Dial and turn it in either direction
until the ASA rating of the film you are using appears opposite the index
mark. Your films ASA rating can be found printed on the film cartridge
or in the instructionsheet packed with it.
To use the DIN rating, turn the Shutter Speed Dial until the correct
number appears in the DIN window on the dial.
Below is a table of the available ASA/DIN ratings with the numbers
represented by the dots shown in parenthesesbeneath them.
A S A 2 5 . . 5 0 | r 1 O O . . 2 O O . . 4 0 0 . . 8 O O 1 6 0 0 3 2 O O
32 40 64 80 r25 160 250 320 500 550 looor250 20002500
D I N 1 5 . . 1 g . . 2 L . . 2 4 . . 2 7 . . 3 O . . 3 3 . . 3 6
16 t7 19 20 22 23 25 26 28 29 31 32 34 35
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SELECTINGTHE SHUTTERSPEED
The shuttercontrolsthe length of time light is allowed to strike the film.
The speed at which the two shutter curtains pass across the film is
measured in fractions of a second that correspond to the numbers on
the Shutter Speed Dial. (250 is 1/250 second, 2 is 1/2 second, etc.)
The number"1"on the dial representsone full second exposure.When
set on the "B" setting,the shutterwill remain open as long as the Shutter
Release Button is depressed.When using the " B" setting,and for ex-
posures longer than 1/30 second, a cable release and tripod should
be used to minimizecamera movement.
To select a shutterspeed, turn the Shutter Speed Dial until the desired
speed lines up with the index mark.
NOTE: Shutter speeds may be set before or after the film is advanced,
but be careful not to pull up on the ShutterSpeed Dial. You may
inadvertentlychange the film speed setting.
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FOCUSINGAND VIEWING
The momiyo/sekor DSX is an SLR camera. That means that the image
you see in the viewfinder is the same image you will see in the final
photograph.
Focusing the DSX is made easier by the micro diaprism focusing grid
in the viewfinder.This small, round area in the center of the viewfinder
exaggerates the difference between the "in focus" and "out of focus"
image. By rotating the focusing ring on the lens barrel until the micro
diaprism disappears,the image is brought into focus.
For subjects with irregular outlines, like wooded hillsides,the entire
ground glass surrounding the micro diaprism may be easier to focus
with, turningthe Focusing Ring until the image appears sharp.
INFRA.REDPHOTOGRAPHY
lnfra-red light waves focus on a plane slightly behind that of visible
light.When using infra-redfilm you can compensate for this difference
by focusing slightly behind your subject. First focus normally until your
subject is sharp Note the position of the Footage Index Mark on the
DistanceScale. Rotate the Focusing Ring until the small red dot moves
into this position and your lens wilf be focused for infra-red photo-
g rap hy.
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TURNINGON THE METER
To activatethe cameras metering system, pull the Film Advance Lever
away from the camera body approximately1/2 inch until it clicks into
position.To prevent unnecessarydrain on the battery,lock the meter
in the "OFF" position when the camera is not in use. Press the "OFF"
button on top of the Film Advance Lever and the lever will retract to-
wards the body
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SELECTING THE METERSYSTEM
There are two methods of determining correct exposure with the
momiyo/sekor DSX. Whether you use the "Spot" or "Average"
system will depend on the type of picture you are taking.
SPOT READING
The "Spot" method of exposure calculationis especially valuable when
the most important part of the picture is either much lighter or darker
than the surrounding area, as in a landscape, where the sky is much
brighter than a tree or house. A picture like this would be under-
exposed if measured with the camera's averaging meter.
"Spot" readings are also useful in dim light, such as indoor or night
scenes, because the "Spot" meter reacts more quickly under these
conditions than an averaging meter.
To take a "Spot" reading, set the shutter speed and move the Spot/
Average Selector Switch to the "S" position. The small pointer at the
bottom of the viewfinder screen will point to the letter "S". Look through
the viewfinder and aim the camera so the brackets fall on the most
important part of the picture. For the most accurate reading be sure
the bracketed area doesn't include objects much lighter or darker than
the area you want to measure.
AVERAGEREADING
lf your subject is not surrounded by very light or dark areas, and is not
backlit, the averaging system is often the best to use.
Push the Spot/Average Selector Switch to the letter "A". The pointer in
the lower section of the viewfinder will move outside the brackets to
the "A" to remind you the entire picture area is being measured by the
meter.
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SETTINGTHE EXPOSUREwww.orphancameras.com
1. Turn the Shutter Speed Dial until the shutter speed you wish to use
lines up with the index mark. Outdoors in bright or hazy sunlight 1/125
second should be fast enough for most situations,depending upon the
f i l m y o u u s e . I n d o o r s i n a w e l l l i t r o o m , 1 / 6 0 s e c o n d o r s l o w e r s h o u l d
be sufficient under most conditions.
2. Rotate the Aperture Ring on the lens until the needle to the right of the
finder is centered between the open ends of the index mark. When
the needle centers, the exposure will be correct. lf the meter needle
does not come to the center no matter what aperture you choose,
change shutter speeds.When the needle is on the (+) side, the picture
is overexposed and you need to select a faster shutter speed. When
the needle is on the (-) side,the picture is underexposed and a slower
s p e e d s h o u l d b e c h o s e n .
NOTE: You may reversethe procedure if you wish to use a certainaperture.
In this case, select the aperture and center the meter needle by ro-
tating the Shutter Speed Dial.
When using SX lenses it is not necessary to push the Film Advance
Lever toward the camera body to take a meter reading. This action is
t a k e n o n l y t o v i e w d e p t h - o f -ife l d .
In general photography the meter requires no special calculationsor
compensation to obtain correct exposures even if filters or close-up
E x o o s u r e M e t e r N e e d l e accessories such as auto-bellows or auto extension tubes are used.
S p o t / A v e r a g e I n d i c a t o r Meter readingstaken withthe normallens alone and then with accessories
attached may not be the same due to the properties of the accessories, Area Measured by Spot Meter
but the exposures will be correct. In close-up photography the meter
I n d e x o f M e a s u r i n g R a n g e reading must be taken after the final focus, since exposure in this
instanceis affected by the distancebetween lens and f ilm.
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DEPTH OF FIELD
When the camera is focused on an object, an area in front of and be- *f hind the object will also be in acceptably sharp focus I
distance The between the nearestand farthestobjects in focus is called il1 -Field. Depth-of T^-F
Each time the aperture is changed, depth-of-fieldchanges also. As the
lens rs stopped down towards t/16, depth-of-fieldincreases,and as the
l e n s r s o p e n e d t o w a r d s t / 2 , i t d e c r e a s e s
Knowing how to use depth-of-fieldallows the photographerto use the
p r i n c i p l e so f " s e l e c t i v ef o c u s " t o e l i m i n a t eu n w a n t e d f o r e g r o u n da n d
background objects from his photographs,and could mean the differ-
ence between a snapshotand a successfulphotograph.
To view the depth-of-fieldin your photograph with the DSX, bring your
subject into sharpestfocus and press the Film Advance Lever in towards
the camera body This causes the lens diaphragm to "stop down"
(become smaller) The exposure meter needle may deviate from I
the center of the index mark, but do not readjustthe exposure setting. lI The lens is now at the aperture at which the picture will be taken
NOTE: When taking exposure meter readings with SX lenses, DO
t / 1 6 NOT press the Film Advance Lever tor meter reading.
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The depth-of-field will appear in the viewfinder exactly as it will appear
in the finished picture.By changingthe focus while the lens diaphragm
is stopped down you can select the area of sharpness in your photo-
graph. When usi'ngpreset or non-automaticlenses the diaphragm must
be set manually,but the same results are achieved.
You may also determine the depth-of-field by checking the scale on
the lens barrel. Numbers representing lens apertures appear at the
near and far limits of depth for any given focus distance and lens open-
I n g .
For example, if the standard lens is focused at 15 feet, one of the marks
representing f/11 appears at the 10 foot mark and the other at the 30
foot mark. This means that in a photograph focused at 15 feet and the
diaphragm set at t/11, everything between 10 and 30 feet will be in ac-
ceptably sharp f ocus.
THE AUTOMATICLENS
The momiyo/sekor standard lens features an automatic diaphragm to
let you view the scene at the lens maximum aperture. When you press
the Shutter Release Button the lens will automatically "stop down" to
the aperture you selected and re-open immediately.
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CHANGINGLENSESt0
C A U T I O N : P L E A S E R E A D T H I S S E C T I O N C A R E F U L I - YB E F O R E A T -
T E M P T I N GT O R E M O V E O R I N S T A L LA L E N S
To remove an automatic lens from your camera, first press the meter
"OFF" button. Hold the camera securely with one hand and press the
Lens Release Button. With the other hand, f irmly grasp the lens and
rotate it counterclockwiseuntil all the threads have been disengaged.
To mount the lens, screw the lens threads into the lens mount on the
camera body, rotating the lens clockwise until it stops and locks into
place with a sharp click While mounting the lens, never press the lens
release button
Always be sure the meter is in.the "OFF" position,and that the threads
are properly engaged. lf the lens is difficultto screw in, remove it and
inspect the threads for dirt or other foreign matter
Do not touch the reflex mirror in the camera body after removing the
lens. Dust particles can be removed with a blower or soft camels hair
b r u s h .
I M P O R T A N T :
Protectyour camera body and lens by using lens and body caps.
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HOLDINGTHE CAMERAtl
Support the camera in the palm of the left hand, with the thumb and
forefingergripping the focusing ring. The palm of the right hand should
fit againstthe right side of the camera body with the forefingerresting
near the Shutter Release Button and the thumb on the camera back.
Look through the viewfinder with the camera resting against the fore-
head to help steady it, and the left elbow held in againstthe body.
As a general rule,the camera should not be hand held at shutterspeeds
slower than 1/60 second. This becomes particularlyimportant when
using lenses of longer than normal focal length,where it may be neces-
sary to use even fasterspeeds to eliminatecamera movement.Atspeeds
slower than 1/60, a tripod is a must for the sharpestphotographs.
IMPORTANT:When attaching the camera to a tripod that has a long
attachment screw, adjust the screw to less than 1/4 inch
(6.35mm)to prevent damage to the interior of the camera
b o d y .
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SELF TIMERf2
The DSX 1000 has a built-in self-timer, providing a method of delaying
the shutter release up to 10 seconds, allowing the photographer to
include himself in his own photographs.
When the self-timer is rotated 180 degrees, a delay of 10 seconds is
provided before the shutter is released. Rotating the lever less than
180 degrees gives shorter delay times. The self-timer "activating"button
rs located behind the lever and is visible only when the timer is set for
u s e .
Since the self-timer operates independently of the Shutter Release
Button, the camera may be operated in the normal manner, using the
Shutter Release Button, even when the self-timer has been set.
NOTE: lf the Self-timer Lever is not rotated at least 90 degrees, it will
n o t f u n c t i o n .
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PHOTOGRAPHYr3FLASH
The flash terminals, marked FP and X (10), allow for a choice of flash
synchronizations.The selection of a terminal depends upon the type
of flash used, as well as shutter speed. The following table shows the
correct combinationsto be used in various flash situations.These com-
binationsmust be observed to insure correct synchronization.
Shaded areas indicate the shutter speeds at which listed bulbs are to
be used, with the cord attached to the correct terminal position
Flash Synchronization Ghart
S H U T T E RS P E E D S
F L A S H
T E R M I N A L
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EXPOSUREFOR FLASH PHOTOGRAPHY
ln flash photography,exposure is determined by the guide number of
the flash bulb or electronic flash unit. The guide number representsa
relationshipbetween the power of the flash and the speed of the film.
F l a s h b u l bg u i d e n u m b e r s c a n b e f o u n d o n t h e p a c k a g e t h e y c a m e i n
Guide numbers for electronicflash units are found in the manufacturers
specifications
Once you've found the correct shutterspeed for your type of flash,(see
FlashSynchronizationChart), you can compute the correct lens opening
b y t h i s f o r m u l a :
To use the X ("hot shoe") contact on the G U l D E N U M B E R+ L E N S - T O . S U B J E C DT I S T A N C E : A P E R T U R E
c a m e r a w i t h c o r d l e s s f l a s h u n i t s , p u l l
the cover off the shoe and fold it down lf the flash you are using has a guide number of 56, for example, and
out of the way if, after focusing, you determine from the lens barrel Distance Scale
that the subject is 7 feet away, divide 56 by 7 The answer is 8; therefore
N O T E : W h e n u s i n g f l a s h u n i t s w i t h the correct aperture is f/8
synchronization cords, an e-
l e c t r i c a cl h a r g e i s p r e s e n ti n t h e Not only is flash the most effective light source for indoor snapshots
" h o t s h o e " K e e p t h e c o v e r i n and shooting in dark places, but it's also an effective tool for back-
place to prevent the possibility lighting portraits and filling in shadows. Remember that when flash is
o f a l i g h t e l e c t r i c a ls h o c k w h i l e used as a supplementallight source, exposure must be based on the
t h e u n i t i s c o n n e c t e d l i g h t f r o m t h e m a i n l i g h t s o u r c e ( s u c ha s t h e s u n ) .
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