Q T II Lenses User manual

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Automatic Diaphragm
Multi-Coated Lenses
and Tele Converters





 OTtr  MC AUTO Lenses and Tele converters are available
  for the following cameras: the latest CANON, MINOLTA,
  RICOH, CHINON, PENTAX, NIKON, including New Programmed
  Cameras.

O T tr MC (multi-coated) lenses and Tele Converters are fully auto-
 matic and incorporate  not only computer optical design but also the
 latest optical multi-coating  techniques. The process of multi-
 coating assures virtually flare free photographs even under adverse
 lighting conditions resulting in crisp, high contrast pictures with full
color fidelity.  In addition O T tr MC auto lenses and Tele Converters
are designed to retain the full range of exposure automation and
metering capabilitles of the camera on which they are mounted.


MOUNTING THE LENS
OT II MC auto automatic lens mount is similar in design to that of
the standard automatic lens (50mm, 55mm, etc.) with which your
camera is equipped, and is mounted and dismounted in the same
manner as the 'standard' lens. Consult your camera instruction
manual for detailed instructions on mounting interchangeable
lenses on your camera.


KR MOUNT
This is a new program mounl for all Pentax 'A' series, Pentax "K",
and Ricoh programmed cameras. For use with programmed came-
ras, rotate the diaphragm ring to the green 'A' mark beyond the
smallest aperture by pressing the lock-button.


SETTING THE F STOP
Rotate the diaphragm ring to set the desired F stop at the index mark
on the lens barrel. The diaphragm can be set to  f ull stops or to any
position in-between. Proper F stop is chosen as indicated by the
camera's  built-in exposure meter or an independent meter; or may
be dictated by special requirements, such as controlling the depth
of field.



METER COUPLING
Meter coupling of the lens to the camera is done automatically as the
lens is mounted on the camera body. Full aperture metering of the



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               original standard lens will, in most cases, be retained when using
        O T tr MC auto lens. One exception to this is that when using
         O T n MC lenses with the Pentax Universal Screw Mount, metering
          must be done at shooting apertures only.


        EE OPERATION
             Minolta and Canon mount lenses allow automatic aperture selection
         when used on cameras having this feature.
           With the Minolta XD camera and Minolta Mount lenses, to use the
             shutter priority mode, set the diaphragm to the minimum aperture
              setting (marked in green) and set the camera controls as indicated
              in the camera instruction manual.
             For use with the Canon AL-1, AE-1. A-1 and F-1 cameras. rotate the
          diaphgram ring to the green '4" mark just beyond the minimumt\           aperture setting.
n
         GAUTION: Do not attempt to mount a lens on Canon camcres
            other than the F-1, AE-1, AV-1 or EF while the diaphragm ring is set
              to the EE position. First turn the diaphragm ring to a manual aper-
            ture setting in order to retract the EE pin on the rear of the lens.


        INFRA.RED FOCUS
          For infrared photography, correction of the distance scale  is
           necessary because the infra-red rays are longer than the light rays
               of the visual spectrum. Focus  f irst in the ordinary manner and then -
           before exposure -  reset the distance indicated on the focusing
             ring to the appropriate R-index (red lines). For proper exposure
         and filtration with infra-red materials, follow the film manufac-
            turers recommendations.  Infra-red index lines are not included on
                all lenses.


       DEPTH OF FIELD
        Some lenses are provided with a depth of field scale. On these
            lenses depth of field is indicated for any distance and f stop setting

I

       on the double scale of f- numbers engraved on both sides ofthe
         center reference line. The distance settings opposite the f - number
        being used (shown on the left and right hand parts of the depth of
          field scale) indicate the range of sharpness at that distance and  f
         stop.



      FOCUSING THE LENS
        Look through the view finder of your camera and rotate the focusing
          ring to get a sharp and clear image in the view finder. Due to the wider
        depth of field, it is more ditficult to see the image 'snap' into locus
         with wide-angle lenses orwide-angle settings  of zoom lensesthan  it
           is with telephoto lenses or settings. This depth of field makes wide-
       angle focal lengths desirable for quick, prefocused  shooting.
        For example, at f16 the depth of field on your 28mm lens extends
       from less than 3 feet to infinity. The distance scale indicates the
         distance between the focused subject and the film plane. The scale
           is necessary  for checking the depth of field, exposure with flash and
              inf ra-red photography.



      USING PARFOCAL ZOOM LENSES
       The 80-200mm Compact Macro Zoom Lens is a true parlocal zoom
          lens. This means that focusing can be done at any focal length and
         proper focusing will be maintained as the zoom control is changed
          to compose your picture. For most critical focus with these lenses,
        your lens should  first be set to the longest focal length of the zoom
         range, focused lor the sharpest image in the view finder and then
      zoomed back for the desired composilion. The larger image and
         shallower depth of field at the longest focal setting in the zoom range
           will help you to get more critical focus. Naturally, your lens may be
       focused at any point within the zoom range, but focusing at the
        shortest focal setting and zooming up should be avoided unless
        focus is re-checked betore shooting.


     HOW TO USE THE MACRO.FOCUSING SYSTEM
       Convenient close focusing capability has been provided on the
        compact macro zoom lenses by having extended focusing range at

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 close distances. Focusing at close distances with these lenses is
done with the focusing ring in the same manner previously de-
scribed lor conventional focusing. Additional scales on the index
 barrel indicate the reproduction (Macro) ratios. These scales indi-
 cates the ratio of film image size to object size. The ratio varies with
each focal length. For largest reproduction  ratios, turn the zoom
 control to the largest focal setting and the focusing ring to the
 closest setting.



USING THE VIEW.FINDER WITH TELEPHOTO LENSES
The etfectiveness  of diflerent types of focusing screens varies with
the local length and maximum aperture of the iens. The range finder
or microgrid prisms built into the ground glass do not work as well
with longer focal length lenses as they do with the normal camera
lens and most wide-angle lenses, and may blackout partically or
 fully. When such a condition exists, focusing is best done on the
ground glass portion of the viewing screen. On some SLR cameras,
 long telephoto lenses appear to produce a cut-otf image in the up-
 per corners or along the entire upper edge of the view finder. Actually
such viewing cut-off is caused by the size of the camera's mirror
which is adequate for the shorter focal length lenses only. The
exposed slide or negative will be unaffected by this viewing
deficiency.



PROPER CARE OF FOCAL MC AUTO LENS
O T n MC auto lens should always be capped to protect  it when not
in use. Like other precision optics, it should never be simply wiped
with tissue since such tissue may abrade the surface with any dust
which might be on  it or on the lens.
Any accumulated dust should occasionally be blown off with a
syringe or one of the available pressurizded  air products. To remove
a fingerprint or smear, shred the edge of a lens tissue and roll
it to make a swab; dampen it with a lens cleaner specially made
for photographic  optics and gently wipe the surface without exercis-
ing any pressure.  lf repeating the procedure is necessary use
a new swab.
Close examination  of any multi-coated lens may reveal some minor
coating defects or a small bubble in an interior lens element.

These will in no way affect the performance  of OTtr MC auto
lens.



EXPOSURE:
500mm Telephoto Lens with 2X Converter
Cameras with TTL metering system require no additional adjus-
tment. However cameras not provided with TTL metering system
such as with external reading metering system or with hand-held
meter,  it is required to compensate the exposure whenever Tele
Converter is used. Simply open diaphragm 2 stops more with 2X. In
use with artificial lights, also open diaphragm 2 stops more than that
of GUIDE NUMBER table indication for 2X.


In the following is Exposure Compensation Chart sho,rring f stops
adjustments:
Prime  I Value        1.2 1.4 2 2.8 4 5.6  I 11 16 22
W2X Converter     2 2.8 4 5.6 I 11 16 22 32 45

The camera shutter speed can be adjusted in the same manner
instead of making the adjustment of exposure with diaphragm.
However you should keep in mind that the image is magnif ied by Tele
Converter and lens combination,    it istherefore recommended  to use
with tripod and as high a shutter speed as possible when using
telephoto lens with Tele Converter. This also applies to close-up
photography.

For your guidance, Focal Distance Conversion Chart is shown
hereunder:
           Focal Distance Conversion Chart (Unit: mm)
Prime Focal Length    50 55 85 100 135 200 400 500
W2X Converter        100 110 170 200 270 400 800 1000

70-210mm f/4.0-5.6             www.butkus.us
 One-Touch Macro
 Compact Zoom
 Lens




        Focusing and
     Z@m Ring



      Dislancs Sc6l6
                                               Zoom ScEle
                                                       (F@al Longth Scale)   Macro Ratio Scal€
                                                         R-lndsx f6 Infra-RedIndex fq Ost6nce,                                         Photography
Diaphragm, and F@al
(Z@m) Scales                                          Oiaphragm Ring

                                                       Lons Mount
      SPECIFICATIONS
         Apqture rang9: 14.0J22 Angle of viry:34.0.-    t l.S.
         Min/Md. F@us Dist.:    Elemgntstlogroups  t2 stgm€nts         l.lMtolntinity           Filtersiz€:52mmgcrw-in
          lMEcro at f=2'lomm:   t :41

28n0mm t13.5-4.5               www.butkus.us
 One.Touch Macro
 Compact Zoom Lens





 Foclsing and
 Zoom Ring

 Distance Scale
                                                 Zoom (F@al Lenglh)
                                                              Scale
 Index fot                                                 R-lndex tor Infra-Red
 Diaphragm, and Foc6l                                       Photography
 Length (Zoom) Scales                                     Oiaphragm Ring


                                                         Lens Mount
        SPECIFICATIONS
            Aperture Range: f3.5-t22 Angle ol view: 75..33.5.
          Min/Max Focls Oist.:      Elemenls: 9 groups g-eler
          0.4M lo inlinity                 Filter size: 55mm scr*_in
           (Macro at l-70mm. 1 4)





Focusing and
Zoom Ring




Distance Scale
Macro Ratio Scale                                 Zoom(F@al ScaleLenglh Scale)

                                                       R-lndex tor Infra-R€d
Index lor Distance                                          Photography
0iaphragm, and Focal
(Zoom) Scales                                           Diaphragm  Ring
                                                       L€ns Mount
      SPECIFICATIONS
           Aperture range: t..0-122 Angte otvaew 39.5..8.
          Min/Max. Focus Disl.:    Elements llgroups 15 elements
          1-2M to Infinity            Fi[er size: 62mm screw-in
          (Macro at t=300mmt 1 2.81

Mike Butkus Digitally                                         DN:ou=butkus.org,Date:cn=Mike2023.05.03signedButkus,email=mike@butkus.org,by18:07:41Mikeo=ButkusButkus-04'00'camera manuals,c=US

  Focusing and
 Z@m Ring

  Distance Scale
                                                Zoom (Focal Length)
                                                              Scale
                                                          Depth ot Field Scale
                                                         R-lndex                                                            tq Infra-Red  Indgx lq Distanca,                                                            Photography  Oiaphragm,            and Focal
  L€ngth (Zoom) Scates                                    Diaphragm Ring
                                                         Lens Mount
       SPECIFICATIONS
            Aperture range:  fa.o -t22  Angle ot viewt 30..  I 2.
            Min/Max. Focus Dist.:    Elements:9 groups 13 elements
                 l.3N,l to Inlinity               Filter size: 55mm screw-in
           (Macro at l=200mm: 1:5)





 Focusing and
 Zoom Ring


 Distance Scale

                                                Zoom Scale
                                                                  (Focal Length Scate)
                                                        R-lndex fd Intra-Red
 Index lgr Oistance,                                         Photography
 Diaph.agm, and F@d
 (Zoom) Scales                                           Diaphragm  Ring

                                                        Leds Mount
       SPECIFICATIONS
           Aperture  range: t..o -f22  Angle ol view: 76.-12'
           Min/Max. Focus Dist.:    Elemenls 14groups 15 etements
          1.8M lo Infinity               Filter size: 72mm screw-in
         lMacroatl=200mm  I 4J