Sigma Mark - I User manual

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SPECIAL FEATURES OF THE SIGMA MARK  I
 * Through-the-lens viewing ends accidental subject cropping...you see
   your exact picture in the brilliant viewfinder before you take it.
 * Through-the-lens  focusing: Micro-prism image rangefinder plus focus-
   ing screen make extra-sharp pictures easier to take.
* Through-the-lens system Cds exposure meter measures light with
   high degree of accuracy.
* single-stroke film-advance lever also cocks shutter, counts exposures
  and prevents double exposures.
*  Instant-return mirror: Automatically returns to viewing position the
   instant exposure is made-no viewfinder "blackout" to deray picture
  taking.
*  Automatic diaphragm: You focus and compose with lens at its widest
  opening-prevents viewf inder dimming when smalrer lens openings are
  selected.                 t   :+..&t                                  Utl
* All metal focal plane shutter: Full range of speeds from 1 second to
  1/1000 second plus bulb let you "freeze" swift action as well as take
  photos of excellent quality in even dim-light conditions.
* Built in hot shoe for convenient flash operation.


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       '* An extensive range of sigma Lenses to choose from: fish-eye.,
  ultra-wide , zoom, macro, flash-auto, telephoto and ultra-telephoto





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NOMENCLATU R E
A) A.S.A Dial
B) Neck Strap Eyelet
C) Self-Timer
D) Rewind Crank and Camera Back Lock Release
E) Film Reminder Dial
F) Aperture Ring
G) Distance Scale
H) Depth of Field Sbale
J)  Focusing Ring
K) Film Advance Lever
L) Exposure Counter
M) Shutter Release Button and Cable Release Socket
N) Shutter Speed Dial
O) Viewfinder Eyepiece     :
P) Rewind Shaft                                                                                              .
O) Rewind Button
R) Tripod Socket
S) Sprocket Teeth (2)
T) Take-up Spool
U) Film Chamber
                      (2)V) Flash Socket
W) Exposure Meter Switch
X) Mercury Battery Compartment Cover
Y) Hot Shoe


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FILM LOADING
Always load the camera in the shade, never in bright or direct sunlight.
Press Shutter Release Button (M) ... Pull Rewind Crank tD) until
camera back clicks open. Swing open camera back, place film cartridge
into Film Chamber (U) and push Rewind Knob back to its original
position  ... be certain Rewind Shaft (P) engages film cartridge.
Pull tapered end of film across back of camera and insert into and
through the left side of slit of Take-up Spool (T).Rotate Take-up Spool
in direction of arrow to take up film slack... check to see that sprocket
holes in film have engaged both sets of Sprocket Teeth (S) (Fig. 1), and
that the gear tooth on the take-up spool has entered a sprocket hole in
the film. Close the camera back and snap it shut. Advance Film
 Advance Lever (K) twice, pressing Shutter Release Button (M) each
time. Advance Lever once more and Exposure Counter (L) will be
automatically set to "1", ready for your first picture. Set the camera
for the film which you are using by rotating A.S.A. Dial (A), while
pulling it out, until the ASA number of your film is opposite the
indicator line (Fig. 2). Also turn Film Reminder Dial (E) and set the
corresponding type of your film to the indicator line. This will help to
remind you of the type of the film you are using. Check the instruction
sheet packaged with your film for the correct ASA speed for that film.
lf you are using German film, please refer to Fig. 3 for the relation
between ASA and DlN.
CORRECT EXPOSURE                 6J/"''utCorrect exposure is achieved by adjusting the lens aperture and shutter
speed to the correct combination for the film, subject and lighting
condition. As your Sigma Mark  I camera has a built-in through-the-lens
system CdS exposure meter, you can adjust exposure with a high degree
of accuracy in the following way.
1.  Unscrew the Mercury Battery Compartment Cover (X) with a coin
    and place a battery with the plus (+) end up (Fig. a). The battery

will last for a year or so. For replacement use Eveready EPX625,
    Mallory RM625R or equivalent.
2.  Be sure that the correct ASA number is set on the ASA Dial (A).
3. Turn "ON" the,Exposure Meter Switch (W) pushing it upward
     (Fig.5).
4.  Set either the shutter speed or lens opening according to your
    photographic need. (Read "Setting the lens" and "Setting the
    shutter" carefully).
5. While looking at your subject through the Viewfinder Eyepiece
    (O), rotate either Shutter Speed Dial (N) or Aperture Ring (F)
     until the exposure meter needle at the right side of the Viewfinder
      is aligned with the center of the two arcs (Fig. 6). You have now
    adjusted the camera for a correctly exposed picture. When the
    needle is above the horizontal position you will be overexposing
    and when the needle is pointed down you will underexpose the
    picture. (Overexposure results  f rom too much light reaching the
    film-underexposure from too little). The exposure meter needle
   can be brought to the horizontal position by adjusting either the
    shutter speed dial or the aperture ring-or both. To correct
    overexposure use a faster shutter speed (higher number) and/or a
    smaller f stop (higher number). To correct underexposure use a
    slower shutter speed andlor a larger f stop opening (smaller
    number). Change the shutter speed or the lens opening so that the
    correct exposure combination is made (Fig. 6).
6. When the correct exposure settings have been made and the image
    in the viewfinder is too dim for comfortable focusing move the
    Exposure Meter Switch (W) to the "OFF" position. This will fully
    open the lens for maximum brightness.
SETTING THE LENS
Rotate Aperture Ring (F) until the f-stop number you want is opposite
the red mark. Click stops are provided to prevent accidental movement



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from the setting made.
The lens opening (f-stop) determines the amount of light entering the
lens and striking the film. The smaller the f-stop number the wider  is
the lens opening, and the greater is the amount of light entering the lens.
The higher the f-stop number (f/11 vs. f/B), the less the amount of light
entering the lens. As the lens opening is moved, for example, fromf/11
to f/8, a smaller number, the amount of light entering the lens is
doubled.
These instructions are the same regardless of which Sigma lens is used.
SETTING THE SHUTTER         6*k"e,(/J
Turn the Shutter Speed Dial (N) until the desired shutter speed number
appears in the window. Be certain the Dial is set at a click stop (Fig.7).
The shutter speed setting governs the amount of time the film  is
exposed to light. "60" (1/60-second) is recommended for subjects not
in motion. Where motion exists, shutter speeds ranging from 1 1125 to
1/1000 should be used ... 111000 will "freeze" extremely fast action.
To get maximum "depth of field" (area of sharp focus in front of and
behind subject) or when shooting in poorly lit areas, speeds ranging
from 1/30 to 1 second and "8" (bulb) are available. When using these
slower speeds, use a tripod or other firm support to prevent movement
of camera and blurred pictures. When set at "B" the shutter will remain
open as long as the Shutter Release Button (M) is pressed (preferably
by a cable release accessory). The "B" setting is used for long exposures
for example when using street lights or electric signs as a light source, or
under poor light conditions when flash is not being used.





                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         IVIEWING AND FOCUSING
Look into Viewfinder Eyepiece (O) to compose your picture and focus
the lens. Rotate Focusing Ring (J) until subject becomes clear in the
center circle area. When your subject appears sharp in the micro-prism
area, your picture has been focused. To take the picture hold the

camera as steady as you can and press the Shutter Release Button (M)
       slowly and smoothly (Fig. B). Since you are viewing through the lens
       there is no parallax problem ... what you are viewing in the viewfinder
        will appear in you,r picture. Even when you shoot close-ups there is no
      danger of accidental cropping as may occur when the viewfinder  is
      above or to one side of the lens of non-single- lens-reflex cameras.

    DEPTH OF FIELD
     The area in front of, and behind your subject which will be in sharp
       focus is called the "depth of field". How much of an area will be sharp
         in your final picture can be determined in two ways:
      Depth of Field Preview
      Whenever the meter switch is turned on the actual depth of field  is
        visible; thus,if you wish to visually check the depth of field merely turn
      on the meter.
                                              us      Depth of Field Scale                \utkus'
      After you have set the lens opening and have focused the camera, the
      area of sharpness in front of and behind your subject can also be
      determined by the Depth of Field Scale which is found immediately
      below the Focusing Ring. Locate, on the Depth of Field Scale, the two
        f numbers corresponding to the f-stop you have set on the Aperture
       Ring. The distances shown on the Focusing Ring between these two f
       stop numbers will be the area of sharpness in your picture.
    THE SELF TIMER
     By using the Self-Timer, you can also get into the picture. Merely moveI      the Self-Timer Lever (C) away from the lens (Fig. 9) and press thex     Exposure Button. There will be an 8-second delay before the Self-Timer
       will automatically release the shutter and make the exposure for you.
      Camera should be placed on a tripod or other sturdy support.



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,lCHANG ING TH E LENS
The Sigma Mark I is equipped with the highly versatile Pentax/Praktica                  jI
lens mount which is extremely simple to use and accepts a host of
accessories To remove a lens, simply grasp the lens firmly in the right         .l
hand while securely holding the camera in the left hand and unscrew  it
from the camera body by twisting it counter clockwise. To attach a
lens, merely reverse this procedure (Fig. 10).
CAUTION: Be sure.the meter switch is turned off when mounting or
dismounting a lens to avoid possible damage to the lens' automatic
diaphragm pin.
FLASH PICTURES
Your camera has synchronization designed to permit flash pictures with
most types of flash bulbs and also electronic flash. The flash connecting
cord from your flash gun or electrcnic flash is connected to one of the
Flash Sockets (V).
Connect flash cord to Flash Socket "M"  ... When using flash Bulb
Nos.: 5, 58 25,258, M5, MsB, M2, M2B, M3, M3B, AG1, AG1B, 6,
68, flash cubes.
Connect flash cord to Flash Socket "X"  ... when using an electronic                     r
                                                                                                                                                                                                                                 ",1ffash or No. SM flash bulbs. Shutter speeds from 1/30 to 11"125 may be
                                                                                                                                                                                                                                                                                                                                                                   iused.
Shutter Speeds from 1/30 to 11125 sec. may be used with Nos.5,58,
M5, M58, 6, 68 flash bulbs.
Shutter speeds from 1/30 to 1/60 sec. may be used with Nos. M2, M2B,
M3, M3B, AG 1, AG 1 B, SM  f lash bulbs, and  f lash cubes.
Hot shoe provision. Flash units with hot shoe provision may be directly
attached to the Sigma Mark I and used without a sync cord.
UN LOADING FILM
Always unload your camera in the shade, never in bright light.

   .,

i     After the last picture on the roll has been taken, press Rewind Button
      (O). Lift up crank on Rewind Knob (D). Turn crank in a clockwise
       direction until the entire roll has been rewound; tension on the crank
.t      will decrease noticeably (Fig. 11).
     Open the camera back by pulling upthe Rewind Knob and remove the
       film cartridge.
      Have film processed as soon as possible.
    TIPS FOR BETTER PICTURES
      Read the instruction booklet caref ully.
       Before you go on a trip or photograph 'a special event, shoot a practice
                              f ilm. i       roll of
      Keep fingers and neckstrap clear of the camera lens.
     When you reach the end of the roll of film (check Exposure Counter),
      the Film Wind Lever becomes harder to advance ... don't try for "just
      one more shot",  it's time to rewind.
       Protect your camera from dust, dirt and rough handling; do not expose
      camera or  f ilm to excessively high temperatures.





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         It
 You have just become the owner of a fine photographic product
 bearing the Sigma trade mark.   It  is one of a large and
 growing family of products from Sigma Corporation.  lt is a
 seal of excellence. In photography, the Sigma mark is your
 assurance of advanced technology and reliable performance.
 Sigma XQ is a series of  multi-coated lenses, featuring
unsurpassed optical quality, exceptional speed, unusuallv
compact size, and unique features.
Your SIGMA xQ MINI-zooM lens is a high resorution,
multicoated optic capable of  fulfilling the most exacting
demands of the professional photographer. Inorder to get the.most
from this lens, please read the following instructions carefully.
1. When using your lens as a normal zoom lens,make sure that the
Normal/Macro Range Ring is locked in the "Normal" position.
2. When foeusing, set the Zoom Ring to the 80mm position,
focus, and zoom to the desired focal length. After focusing
at the 80mm position, focus remains constant throughout the
zoom range. Focusing will be sharper to the eye at the 80mm
setting due to the relatively shallower depth-of-field.
3. Immediately above the Zoom Ring, the depth-of-field scale
for the wide-angle (39mm) range is engraved in green; it  is
preceded by a "W"  to indicate wide-angle. The telephoto
(80mm) range depth-of-field scale is engraved in orange and
is preceded by a "T" to indicate telephoto. Use the wide-angle
range for maximum depth-of-fieldwww.butkus.usand the telephoto range for

minimum depth-of-field.
4. Using your 39-80mm Mini-Zoom as a Macro Lens
Immediatety b"to*                                Macro
Focus Ring. It should be locked in the Normal position for
general use. To unlock the Macro Focus Ring, push down on
the lock lever directly beneath the word "Macro'l push the
Macro Focus Ring clockwise to shift to the macro range.
The more the MacroFocus Ring is moved clockwise, the closer
you will be able to approach your subject. The second lever
on the Macro Focus Ring, opposite the lock lever, is merely
an aid for turning the ring; it is not a lock lever.
The following points should be kept in mind when shooting
in the macro         range:        us                   oql/<as  '
  a. The macro range may be used at any focal length from
    39mm to 80mm.
  b. The reproduction ratios engraved on the Macro Focus
    Ring apply when the Zoom Ring is set to 39mm
    and the Focusing Ring is set to infinity.
 c. Moving the Focusing Ring when in the macro range will
     have little appreciable effect.Focusing  in the macro range
    should be done in any of the following ways:
    -Remain stationary and turn the Macro Focus Ring
      - Remain sta{ionary and turn the Zoom Ring
      - Change the subject-to-camera distance by moving forward
      or backward until the subject comes into focus
 d. Macro photography involves working with very shallow
     dgpth-of-field. For this reason, it is desirable to stop the

lens down as much as possible for sharpest results.
   e. When the Macro Focus Ring is returned to the normal
       position, it will automatically lock in place.
ATTENTIOi\:  All macro zoom lenses become varifocal Ienses
when used in the macro range; that is, each time the Zoom Ring
is moved, the lens has to be refocused. Of course, it is also
impossible to focus at infinity when in the, macro range. After
the Macro Focus Ring is returned to the normal position, the
lens becomes a normal zoom lens.'

Specifications
Focal Length               : 39mm-80mm
Lens Speed                :  f3. 5
Minimum Aperture        : f22
Lens Construction      : 12 glements in 10 groups
Angle of View               : 56'-30'
Minimum Focusing Distance
                                                                             ( 10. 2 inches  )    in Macro Mode          : 26cm
Filter Size                  : 62mm
Dimensions              : 71mmX84mm (2.8inchesX
                              3.3 inches)
Weight                      : 5009 (l7.6ounces)
Lens Coating              : Multi-coated
Reproduction Ratio        :  1: 1/3. 5


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