Sears Interchangeable Lenses User manual

Depth of FieldF-              .*:                                                r'        When the camera is focused on an object, an area inhrr*    *                                          front of and behind the object will be in acceptable
Multi-Coating                                        sharp focus. The distance between the nearest and
                                                                    farthest objects in focus is depth of  f ield. The multi-layer method of lens coating utilized in the
 manufacture of Sears lenses is the most efficient way                                                 The apparent depth of sharpness when focusing on a of controlling the transmission of light through the         subject is determined by the focal length of the lens lens. Light flares and reflections are minimized by                                             and F/stop selected. A wide angle lens appears to these multiple lens coatings.                                 have greater depth of sharpness, while a telephoto lens
                                                          appears to have a very narrow and selective depth of
                                                        sharp focus. By stopping a lens down (closing), tnis
Aperture Control                                        apparent depth of sharpness can be increased. Depth
                                                         of  f ield adjustments can produce very creative results The automatic diaphragm operation of your Sears lens
 allows you to focus and compose your picture with              if properly used.
 the diaphragm at maximum aperture (wide open),
 presenting you l,vith the brightest possible viewfinder
 image. When shooting, the diaphragm will automatical-
 ly stop down to the pre-selected aperture at the
 moment of exposure and re-open as the exposure is
 completed.
 This function is performed internally with bayonet
 mount lenses. There is an Auto/Manual switch on
 lenses with a Pentax universal screw mount, which must be set on "A" for automatic diaphragm control.
 When set in the "M" position, the diaphragm opens
 and closes as the aperture ring is rotated.

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LAs on your standard camera lens, your new accessory M@
lens has a depth of field scale which enables you to        Storaqe
calculate limits of focus in front of and behind your        Never store lenses in extreme heat and high humidity
main subject. These mark ings correlate with the         areas. Avoid areas where there is heavy exposure to
distance scales on the focus ring. For depth of  f ield          salt water or salt air.
pre-view. see your camera instruction book.                                                              Protect your lens by using front and rear lens caps.

                                                   Care and Cleaning
                                                                 tJse a blower or camel's hair brush to clean the lens
                                                                surface or rub VERY GENTLY in a circular motion
Your telephoto Lens has a built-in sun shade (lens        with a high-quality lens tissue. In severe cases you
hood) to assist in taking better pictures, especially in        can use a small amount of lens cleaning solution, again
                                                        wiping in a circular motion. NEVER RUB THE LENSa backlighted situation.                                    TO REMOVE DIRT OR GRlTl.  lf the dirt will not
                                              come loose with a brush or blower, take the lens to a
                                                             factory approved service technician. Never touch the
                                                             lens with your fingers or any material other than a
                                                            brush or lens tissue. Do not use chemically treated eye.
                                                                     glass tissues.Your Sears lens provides an infra-red index mark (see
Description of Parts) for use with infra-red film. When
using infra-red   f ilm, focus normally on your subject
and read the distance on the distance scale indicated
by the distance index mark. Then, turn the focusing
ring until this distance reading is lined up with the
inf ra-red index mark.

Focusi ng
                                                      Your new Sears lens has been designed to provide you
                                                          with the utmost in fast and easy focusing. To focus,KR Mount                                                 simply turn the Focusing Ring until the subject ap-
                                                                     pears sharpest in the camera's viewfinder. Sears KR mount lenses provide automatic diaphragm opera-
 tion for cameras using PK(Sears) KA (Pentaxland RK (Ricoh)
 program systems. No special adapters or camera adjustments          One-Touch Zoom Lenses
 are required. The KR mount also provides automatic          The 80-200mm and 35-70mm Compact One-Touch
 diaphragm operation for non program,cameras  using pK lens           Macro Zoom Lenses have one rotating barrel which
 system.                                                          covers both zooming and focusing.On the 80-20Omm
                                                                             lens, it also controls the macro-focusing with one
Mounting Your Lens                                         continued action.
                 has                     been Your      Sears lens                               mount                                                     the                                  to                                                  in                            .designed                                                       Close-Focus ([.4acro) System               your     manner same             as                         norrhal                                     lens.                                                         lens                                 Holding                                        the
  f irmly around the lens barrel will give you better           Convenient close focusing capability has been provid- balance and a more secure grip during the mounting         ed on the compact macro zoom lenses by having
 procedu re.                                                 extended focusing range at close distances. Focusing
                                                                at close distances with these lenses is done with the
                                                                 focusing ring in the same manner.previously  describedHolding Your Lens                                                                 for conventional focusing. An additional scale on the
While using your lens, it is best to support the camera/            focusing ring indicates the reproduction (Macro)
 leos combination with most of the weight resting in              ratio. This scale indicates the ratio of film imaoe
 the palm of the left hand. This leaves the right hand             size to object size.
free to operate the controls of your camera and            "Your new 'l35mm F2.8 macro telephoto lens is design-
 assures proper balance and stability.                          ed with a macro focusing action at the closest focus
                                                                    distance. Set the focusing ring at the closest focus
                                                                          distance then rotate the macro ring clockwise to the posi-
                                                                           tion of the desired macro ratio."