Reading Magnification Scale; Using Double Cable Release - Mamiya Auto Bellows M645 Instructions Manual

Reading Scales
(Fig. 14)
Read the scale at the indicator above the Holding Pin (14).
1 . The upper scale shows the lens extension in millimeters. For
applications of the lens extension, see "Using Close-Up
Photography Table" on the last section. Unlike other scales
described below, this scale is valid for all lenses.
2. The lower numbers show image magnifications (the length of
a side of the subject image on film divided by the length of a side
of the actual subject) when using an 80mm lens. Extending t h e
bellows so that the indicator matches with the "X1" mark
provides a life-size (1 :1) magnification.
3. The intermediate scale shows the exposure compensation
values for an 80mm lens which is necessary when metering with
a hand-held exposure meter.
values are indicated by the numbers corresponding to the steps
in the shutter speed or aperture calibrations. Each step has a
different pattern for easier reading. Within the range of the same
pattern, the compensation
example, when the indicator is within the "Step 2" range, set the
shutter speed slower by two steps, open up the aperture larger
by two steps, or set the shutter speed slower by one step and
open up the aperture larger by one step, than the exposure
value indicated correct by the hand-held exposure meter. In
close-up work, the smaller the aperture the better for sharper
photographs. Thus, the exposure compensation should be
mainly done by varying the shutter speeds and the aperture is
only varied for a half-step
compensation values on the scale is not applicable to the case
in which the lens is mounted reversed. The compensation in this
case should be done according to the Close-Up Photography
Table. Also refer to the C lose-Up Photography Table for the
correct exposure compensation with lenses other than 80mm
lenses.
The exposure compensation is not necessary when using
through-the-lens metering with the PD Prism Finder or the CBS
Prism Finder.
4. The green, blue, black and red triangular marks from front to
rear of the scale show the correct extension lengths for
duplicating the 6 x 7 cm, 6 x 6cm 6 x 4.5cm and 35mm slides
and strip film, respectively. The shorter side of the original
picture format is fully photographed on the shorter side of the 6
x 4.5cm format of the Mamiya M645 camera in this duplication.
These marks are applicable only for 80mm lenses.
The exposure compensation
value remains the same.
compensation. The exposure

Using Double Cable Release

The Double Cable Release has two tips a plunger in the silver
tip protrudes first and then a plunger in the black tip projects.
Thus, the shutter is released after the lens aperture is fully
stopped down at a preset value (aperture). Set the A.M. Lever
on the lens barrel at "A" (automatic diaphragm) for the automatic
diaphragm operation with the Double Cable Release and the
Auto Bellows.
Attaching Double Cable Release
1 . Screw the silver head into the Cable Release Socket (Lens)
(4).
2. Screw the black head into the Cable Release Socket
(Camera) (1 ).
Take the following precautions before using:
1. Set the lens aperture at the minimum aperture and cock the
shutter by winding the Film Advance Crank of the camera.
2. Push the release button (R1 ) of the Double Cable Release
while looking at the aperture blades through the lens. (Fig. 16)
By pushing the button partway down, the aperture blades are
For
stopped down to the minimum. Pushing down the button farther
(the release pressure is a little stronger) releases the shutter. If
the shutter is released before the lens aperture is completely
stopped down to the minimum, adjust the Double Cable Release
according to the following procedure.
Adjusting Method
1. Detach the silver tip of the cable release from the socket (4).
2. Turn the ring (R2) on the silver tip in the direction of the arrow
as shown in the photograph, and it is loosened.
3. Then, turn the tip (R3) in the direction of the arrow as shown
in the photograph, and the plunger will come out. The longer
plunger projection stops down the aperture faster. It may not
cause trouble if the plunger is projecting a little from the head
when the release button of the cable release is not pushed
down.
4. After adjusting the length of the plunger, turn the ring (R2) in
the reverse direction of the arrow to fix the tip.
(Fig. 15)