Mamiya M645 Interchangeable Lenses User manual

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                                          Instnrctions


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o Names of Parts              o Attaching Lenses             o Removing Lenses

1. Focusingring
2. Distancescale
3. Depth-of-fieldscale
4. Alignmentdot
5. Aperturering
6. Exposuremeter coupler
7. AM lever



                                   While aligning the two alignmentdots    While depressingthe lens releasebut-
                                     (A & 4), insert lens into camera body.    ton (B), grasp the part of the lens barrel
                               Then twist lens clockwise until it clicks    that has the depth-of-fieldscale and
                                and locks into place.                  alignment dot (4), and twist the lens
                                                                        counterclockwiseuntil it stops. Then
                                                                                                                                    lift out.

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o Depth-of-Field
Depth-of-ltetd relers to the total area
which will appear in focus. The area of
sharpness(depth-of-field)depends up-
on the distance the lens is focused at,
the f/stop being used, and the focal
length of the lens.The area that will ap-;
pear sharp can be determined in two'
ways:



                                              1. Firstly,by setting the AM lever to the     2. Tne depth-of-field can also be de-
                         M (Manual)position, the depth-of-field   termined by refferring to the depth-of-
                                               for the aperture set on the lens can be     field scale engraved on the lens. The
                                    previewed by  looking through the     f/stop numbers are engraved on both
                                             finder.                                  the right and left-hand sides of the cen-
                               *When using the depth-of-field pre-     ter reference mark. Simply locate the
                                     view lever of the M645 10005 camera     f/stop (aperture)youare usingand read
                                   body to check the depth-of-field, set    the figures which appear above the
                                        the AM lever of the lens to the "A" (Auto)    f/stop number on the distancescale of
                                         position.                               the lens.
                                                                           For example, with the 80mm f/2.8 lens
                                                                         focused at 1Oft.(3m) and the aperture
                                                                                       ring set to f/16, the depth-of-fieldscale
                                                                                 reveals that everything from about 7ft.
                                                                          (2m) to about  20ft. (6m) will appear
                                                                               sharp.

Mamiya-SekorC         Mamiya-SekorC         Mamiya-SekorMacro C         Mamiya-SekorC
SOmm t11.9      SOmm 112.8       SOmm f/4          llOmm  t12.8





                                            Mamiya-SexorC SOOmm f/5.6





                                     o Due to modification of the product, design and specilications are subject to change without notice.

#
r Features
Mamiya M645 bayonet mount, Multi-coated, Auto-     sports, and candid photography, the telephoto
matic diaphragm, with Exposure meter coupler,     lenses are ideal.
AM lever provision for depth-of-field preview.        As each lens alters perspective, a choice of lenses
                                                         offers you a choice in the manner of expression.
The chart on the right gives the basic specifica-    Mamiya-Sekor C lenses are your tools for creative
tions  of the lenses currently available for the     photography.
Mamiya M645.                                Because the Mamiya-Sekor C 35mm f/3.5, 45mm
Mamiya-Sekor Lenses have long been established      t/2.8, and Macro 80mm f/4 lenses incorporate a
as a standard for lenses of professional calibre.     Floating System in which some of the lens ele-
Whether you are using a wide, standard, or tele-     ments automatically move forward or backward as
photo lens, the name "Mamiya-Sekor" is your as-     the lens is focused, high resolution, including the
surance that your camera is using optics foremost     very edges of the field, is assured even at the
in quality. In order to make the most of the intrinsic    minimum (closest)focusing distances.
contrast, high resolution,rich color saturation,and    The 70mm f/2.8 lens has a built-in between-the-
clear definition of Mamiya-Sekor lenses, all the     lens shutter which makes  it possible to synchro-
lenses for your camera have been multi-coated.     nize electronic flash at all speeds up to 1/500 sec.
Not only has the quality been enhanced, but flare     (1/500- 1/30 sec.). Moreover, the between-the-
and ghost images have been reduced to a minimal     lens shutter of the lens can be by-passed at any
level, even when shooting under highly unfavor-     time, allowing the focal plane shutter of the camera
able lighting.                                             to be used in its place.
For shooting in cramped quarters, for extensive    *When using the No.3 auto extension ring with
depth-of-field, dynamic perspective, and exciting     the 80mm f/1.9 lens, be sure it is the No.3-S type,
panoramics,you will enjoy the wide-angle lenses.     for when using a No.3 ring without the "S" engrav-
For flattering portraiture, shallow depth-of-field,      ing, vignetting may result.

ffi-
o Lens Hoods                                                                   .  Care and Cleaning

An important accessory to eliminate the detrimental effects    When the lens is not used for a long period of time, do not
of stray light entering the lens.                                store the lens in a damp or salty atmosphere
                                                      Never touch the lens surface. lf a lens needs cleaning,
                                                        blow away the dust particles with a blower, and olean sur-The lens hood for the 45mm wide-angle lens is square in                                                            face with lens cleaning tissue and lens cleaner.shape and the same as the Mamiya RB 67 65mm wide-
                                                                 After removing the lens from the camera body, protect theangle lens hood.
                                                             lens by using front and rear lens caps.Exclusivelens hoods are available for the 55mm, 70mm,
and BOmmf/'1.9lenses.The BOmmt/2.8 and 11Ommlenses
share the same lens hood. Telephoto lenses are equipped
with their own built-onlens hoods which should be fully ex-
tended when in use. The 35mm lens does not reouire a
lens hood.
The telephoto lenses have built-on lens hoods. The built-on
lens hood can be used by simply pulling it out. However, if
you rotate and pull it out, it comes out even more smoothly.

       MomiwR_a

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