Focal auto diaphragm lensesand tele-extenders User manual

F0CAL MC (multicoated) lenses and Tele Converters are fully
automatic and incorporate not only computer optical design but
also the latest optical multi-coating techniques. The process of
multicoating assures virtually tlare free photographs even under
adverse lighting conditions resulting in crisp, high contrast
pictures with full color fidelity. In addition F0CAL MC auto
 lenses and Tele Converters are designed to retain the full range of
exposure automation and metering capabilities of the camera on
which they are mounted.

MOUNTING THE LENS
 F0CAL MC auto automatic lens mount is similar in design to that
 of the standard automatic lens (50mm, 55mm, etc.) with which
 your camera is qquipped, and is mounted and dismounted in
 the same monnei as the 'standard' lens. Consult your camera
 instruction manual for detailed instructions on mounting inter-
 changeable lenses on your camera.
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     DIAPHRAGMAUTO
Some lens          models have an- A-MM' NUALring nextCONTROLto the diaphragm ring.
 This functions as a preview (stop down) mechanism on the lens
 itself. For normal automatic operation the ring should be set
to "A". Only to preview the depth of field or to meter the scene
 at the shootinglaperture  should  it be moved to the "M" position.
Many cameras have a built-in stop down switch and do not
 require use of the A-M ring feature.

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
full 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,
ruch as controlling the depth of  f ield.

METER COUPLING
Meter coupl ing of the lens to the camera is done automatically
ss the lens is mounted on the camera body. Full aperture meter-
ing of the original standard lens will, in most cases, be retained
when using F0CAL MC auto lens. One exception to this is that
when using F0CAL MC lenses with the Pentax Universal Screw
Mount, metering must be done at shooting apertures only.

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  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 diaphragm ring to the green EE mark just beyond the
   minimum aperture setting. For new Pentax Super "A" camera,
   your Pentax K mount lens will fit and can be used as the
    aperture-priority method only.     lt will not program on this
   new camera both in shutter speed and aperture opening.

   CAUTION; Do not attempt to mount a lens on Canon cameras
    other than the F-1, AE-l, AV-l or E F while the diaphragm  ring
     is sat to the EE position. First turn the diaphragm ring to a
    manual aperture setting in order to retract the EE pin on the
     rear of the lens.
t INFRA.RED FOCUS   For inlrared photography, correction of the distance scale is
    necessary because the infra-red rays are longer than the light
    rays of the visual spectrum. Focus first in the ordinary manner
   and                                               distance                                                        on                     exposure                                                        indicated                                   -  reset the       then -  before                                                   (red                                      R-index                       the appropriate   the focusing                  ring to                                                       lines). For
   proper exposure and filtration with infra-red materials, follow
   the film manufacturers recommendations. lnfra-red index lines
    are not included on all lenses,
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                                                                                      (  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
   stting on the double scale of f - numbers engraved on both
    sides of the center reference line. The distance settings opposite
   the f - number being used (shown on the left and right hand
    parts of the depth of  f ield 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
y  focusing ring to get a sharp and clear image in the view finder.

Due to the wider depth of field. it is more difficult to see the
   image 'snap' into focus with wide-angle lenses or wide+ngle set-
    tings of zoom lenses than it is with telephoto lenses or settings.
   This depth of field makes wide.angle focal lengths desirable
    for quick, prefocused shooting. For example, at fl6 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 infra-red
    ohotography.

  USING PARFOCAL ZOOM LENSES
   The 8O-2OOmm Compact Macro Zoom Lgns is a true parfocal
   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 zoont range, focused for the sharpest
   image in the view finder and then zoomed back for the desired
   composition. The larger image and shallower depth of field at
t   the longest focal setting in the ;:oom 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 rechecked before 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 close distances. Focusing at close distances with these lenses
    is done with the focusing ring in the same manner previously
   described for conventional focusing. An additional scale on
   the focusing ring indicates the reproduction (Macro) ratio. This
   scale indicates the ratio of film image size to object size. The
    rstio varies with focal length and the scale will be accurate for
   only one focal setting: 2OOmm for the 80-200mm Compact
   Zoom. For largest reproduction ratios turn the zoom control
   to this focal setting.

  USING THE VIEW.FINDER WITH TELEPHOTO LENSES
  The effectiveness of different types of focusing screens varies
   with the focal length and maximum aperture of the lens. The
   range finder or microgrid prisms built into the ground glass do

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 not work as well with longer focal length lenses as they do
 with the normal camera lens and most wide-anlge lenses, and
 may blackout partaally 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-off image in the upper corners or along the
 entire upper edge of the view finder. Actually such viewing
 cutoff 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
 FOCALMC 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 pressurized air products. To
 remove a fingerprint or smear, shred the edge of a lens tiqsue and
 roll it to rnake a swab; dampen it with a lens cleaner specially
 made for photographic optics and gently wipe the surface
 without exercising any pressure. lf repeating the procedure is
 necessary, use a new swab.
 Close examination of any multicoated lens may reveal some
 minor coating defects or a small bubble in an interior len-c
 element. These will in no way affect the performance of F0CAL
 MC auto lens.
  2X Tele Gonverter
                             SPECI FICATIONS
                        o  Multi-Coated
                        o 4 Groups
                                        4 elements
                                                .  Automatic
                                      Diaphragm and
                                        Meter Coupling
                        o 29mm x 60mm O
 FOCAL MC 2X CONVERTER
 F0CAL MC Tele Converter is a small, lightweight and relatively
 inexpensive lens which can be attached to 35mm single lens
 reflex camera to increase the focal length of the camera lens.

Tele Converter fits almost all SLR cameras which have fully
 interchangeable lenses. In those cameras having built-in exposure
meters, Tele Converter couples to the camera metering system.
Tele Converter  is availabfe in 2X magnification. The focaf length
of the camera lens is doubled with 2X Tele Converter.

HOW TO ATTACH AND REMOVE TELE CONVERTER
Remove the camera lens from body and place Tele Converter
direct to body, then attach camera lens to Tele Converter. When
removing, always remove camera lens first, and then Tele Con-
verter from body.

EXFOSUR E:
Cameras with TTL metering system require no additional adjust-
ment. However cameras not provt,Jed 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 d;^ph ragm 2 stops more with
2X. ln 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 showing  f
stops adjustments:
Prime f Value     1.2 1.4 22.84  5.6 811 1622
Wl2KConverter  2  2.8 4 s.6 8 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 magnified by
Tele Converter and lens combination,  it is therefore recommend-
ed. 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 10O 135 2O0 400 600
Wl2X Converter      100 110 170 200 270 400 800 1200