Sears thread mount lenses (Pentax thread mount) User manual

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   KNOWING YOUR SEARS ACCESSORY LENS

 The accessory lens you have just purchased will surely open new vistas in photogra-
phy and help you to shoot pictures with more interest and better composition.


  Your Sears accessory  lens has been manufactured in one of the world's most modern,
well equipped optical products facilities by skilled technicians. Precision workmanship
has gone into every manufacturing step with extra care given to optical glass grinding
and polishing.

  You can be assured that Sears accessory lenses will give you years of reliable picture
taking pleasure.

FEATURES YOU'LL LIKE.....
*PENTAX SCREW MOUNT SYSTEM
   In addition to Sears 35mm TLS single lens reflex cameras your Sears accessory
lens will also fit the following SLR cameras using the Pentax lens mount system:
                              Pentax  . MamiyarzSekor
                              Practica  . Argus STL
                                Ricoh  . Yashica TL series
*A & M AUTOMATIC APERTURE CONTROL
   All Sears accessory lenses allow you to compose and focus your pictures at the widest
diaphragm setting, prorriding maximum brilliance in the viewfinder. At the moment you
snap the picture your lens stops down to the predetermined "f" stop as calculated
through the camera exposure system. Your lens can also be used in a manual mode
if so desired.
* DEPTH OF FIELD SCALE
  As on your primary camera lens your new accessory lens has a depth of field scale
which enables you to calculate limits of focus in front and behind your main sublect.
  These markings correlate with the footage/neters scale on the focus ring. Refer to
your camera owners manual for further details regarding depth of field.
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www.butkus.us            FEATURES YOU'LL LIKE, cont'd.....

          * HELICOID FOCUSING SYSTEM
 I            precision machined internal metal parts of your accessory lens permit smooth focus-
 '          ing with a minimum amount of lens movement and rotation.
          * COLOR CORRECTION LENS COATING
(          Your Sears accessory lens has been coated with magnesium flouride which helps to.           eliminate color distortion as well as flaring caused by the natural refraction of light
          passing through glass.
               ,T BUILT.IN SUN SHADE I
 .           With the exception of the Sears wide angle lens all telephoto lenses have permanent
              built in sun shades. Pulling gently on the outer front edge of the lens barrel brings
1l         the sun shade from its retracted position.I
||          fhe sun shade should be used to prevent direct sun rays from striking the front lens
           element, thus eliminating excessive glare and false exposure meter readings.

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* INFRA-RED FILM INDEX MARK
  The peculiarities of infra-red photograhy  lie in the ability of the film to "see" what
the eye cannot see. Therefore, what appears to be in focus to your eye will not be in
focus to the film.
    lf you are using infra-red film the following steps should be followed:
A.  Focus your lens on the subject until it appears sharpest
B.  Note distance scale position in relation to prime index mark (red line with dot)
C.  Rotate focus ring until previous focus reference aligns with red mark to the right
      of the prime index mark
   lf image appears out-of-focus in viewfinder do not correct. That is no#at for infra.
red photography.
*TRIPOD MOUNTING SOCKETS
 On larger (200mm and over) accessory lenses a tripod socket is provided which
enables the lens to be mounted directly to the tripod for rock steady picture taking.
 A locking slip ring allows the camera format to be changed from horizontal to vertical
withoot removing the camera and lens from the tripod.


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  HOW TO USE YOUR SEARS ACCESSORY LENS
 * MOUNTING
 l.   Be sure light meter switch on camera body is in the ,,oFF,, position.  lf left in
   "ON" position damage to the linkage pin may occur.
2.  With a firm grip on the lens barrel unscrew(counter-clockwise)the prime lens
   mounted on your camera.
3.  Remove the thread protection cap from the butt end of your accessory rens and
   screw it onto your prime lens for added protection. This practice will also help
   to prevent loss of protection cao.
4.   Carefully align the lens threads to the camera body threads and turn clockwise
   until the lens is properry seated.  rf the rens does not turn easily do not apply
  force.  Darnage to lens and camera mounting threads may occur.




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* TAKING PICTURES
1.    lf you are using a telephoto lens greater than 135mm it is suggested that you
  mount your camera on a tripod.  Doing so will help eliminate blurred pictures
   resulting from exaggerated camera movement.
   Select mode setting "A" automati      manual. This is done by rotating the ring
   closest to the camere body. The function of the "A" and "M" setting  is covered in
   the Automatic Aperture Control portion of this manual.
3.   Select the correct "f" stop based on your camera or hand held exposure meter.
4.  With lens diaphragm at maximum opening, focus by rotating the wide milled ring
    until the image in your viewfinder appears sharpest. lf you are focusing based on a
  known fixed distance, line up the corresponding numbers ol the "Ft" (feet) or "M"
   (meters) scale with primary index mark.
5.  Zoom telephoto lenses should be used in the following manner. ln addition to the
   above steps:
     A.  Focus lens in usual manner until image in viewfinder appears sharpest.
     B.  Rotate zoom ring calibrated in focal length millimeters, until you achieve
            the amount of magnification  desired for the subiect being photographed.
6.  Hold camera steady and gently depress shutter release button.

SPECIFICATIONS AND TECHNICALwww.butkus.usDATA

        _9 7337   28mm Wide Angle Lens
        _1 7331    135mm Telephoto Lens
        _9 7339    200mm Telephoto Lens
        _3 7344   300mm Telephoto Lens
       7340     90-23Omm Zoom Lens    I
        _9 7336      Macro lens

These are thread mount lenses M42
they are "Pentax thread".

www.butkus.us135mm
     F2.g



      Aperture: Automatic  t: 2.8-22
     Angle of view: 18'
     Lens construction':4 group, 4 element
    Minimum distance: 5 {eet
       Filter size: 55mm screw-in
      Size: 3*  inches long

2OOmm
    F3.5




     Aperture: Automatic  l: 3.5-22
    Angle of view: 12"
    Lens construction:4 group, 4 element
   Minimum distance: 8-} feet
     Filter size: 62mm screw-in
     Size: 4* inches long

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CARING FOR YOUR ACCESSORY LENS

  your Sears accessory lens is a precision optical rnstrument and should be cared for
accordingly. The following suggestions apply to general lens care:
1.  Always replace front lens cap and rear butt cap when lens is not in use.
2.  Clean glass surfaces using a soft camel hair blower brush to remove superficial
   dust and dirt.   For persistent dirt or finger prints a soft silicone treated cloth
   such as that provided with your lens should be used.
3.   All Sears accessory lenses are permanently lubricated and sealed at the factory'
  DO NOT ATTEMPT TO OIL OR LUBRICATE YOUR LENS IN ANY WAY.





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