Mamiya RB67 Pro-S User manual

Auto Extension Tubes
English

Special Features Attaching
Use this auto extension tube to take
close-up photographs at a distance
nearer than the shortest photographing
range of the lens provided. Since the
lens shutter and aperture are interlocked
by the auto extension tube, close-up
photography or copying can be simply
obtained the same as when taking ordi-
nary photographs.
There are two types, No. 1 and
No. 2, for the auto extension tubes. The
operating method is the same for both
types, and they can be used in a com-
bined condition.
Length of tube: No. l...... 45 mm
No. 2 ......82 mm
1. Turn the bayonet ring of the auto ex-
tension tube, and align the red dot (6)
on the bayonet ring with the red dot (7)
on the extension tube.
2. Mount the extension tube, keeping
the red dot (7) aligned with the red dot
(5) on the camera body; then firmly turn
the bayonet ring clockwise. (Photo q )
3. Also, turn the bayonet ring of the
lens, and align the red dot (9) with the
triangular mark on the lens barrel.
4. Attach the lens to the extension
tube, aligning the triangular mark with
the red line (8) on the extension tube;
then secure the lens by firmly turning
the bayonet ring. (Photoa)
Prior to Attaching the
Auto Extension Tube
If the lens does not fit smoothly, turn
the lens toward the right and left while
pushing the lens against the extension
tube.
1. Cock the mirror (2) by fully pushing
down the shutter cocking lever (1) toward
the front of the camera. (Photon)
2. Use your fingers to turn the cocking
Connecting Method of
pins (3) on the auto extension tube to
No. 1 and No. 2 Tubes
the red cocking position marks (4). 1. Cock the both auto extension tubes
When removing your fingers from the by turning the cocking pins.
pins, the cocking pins will turn back to 2. Align the red dot on the bayonet ring
the green marks (G).( Photo H) with the red dot on the extension tube.
3. Cock the using lens shutter as well 3. Connect the two auto extension
as the auto extension tube. tubes. In this case, either of the two can
be placed in front.
4. Mount the extension tubes on the
camera body, then attach the lens.
“Polaroid” is a registered trademark of Polaroid Corporation, Cambridge, Mass., U.S.A.)

Removing
1. Press the shutter cocking lever (1)
down fully.
2. Turn the bayonet ring of the lens
counterclockwise, and remove the lens.
3. Turn the bayonet ring of the exten-
sion tube counterclockwise, and remove
the extension tube from the camera
body. (Photo H)
Note:
The auto extension tube can be
detached from the camera body in a
combined condition with the lens. Sub-
sequently, however, when using the
lens by detaching it from the auto exten-
sion tube, always confirm that the lens
shutter is cocked.
Photographing
Since the auto extension tube is
interlocked with the full automatic dia-
phragm of the lens, the photographing
method is the same as the common
procedure. However, the reading
method of the exposure compensation
scale is different, so correct the ex-
posure by referring to the close-up
photography table.
1. Mirror-up photography (independent
mirror release) is recommended for
close-up photography with the auto
extension tube.
2. When photographing through the
extension tubes, use as small an aper-
ture as possible.
3. Avoid using a combination other
than No. 1 + No. 2 (e.g., No. 2 f No. 2).
4. When photographing in the 6 x 7size,
if the 127mm lens is used, minimal or
no corner vignetting will occur; how-
ever, when using lenses other than the
127mm lens with two extension tubes
(No. 1 and No. 2) the possibility of some
vignetting in the four corners of the
picture may occur. When using only
one extension tube, no vignetting will
occur with any lens.
5. When photographing with the
Polaroid Land film pack, corner vignet-
ting increases due to the larger picture
size; however, a 6 x 7cm portion in the
center of the photo will be essentially
clear of vignetting.
6. Use only one auto extension tube
No. 1, for the 65mm lens.
7. Do not use the 50mm lens. Using an
extension tube decreases resolving
power due to exceeding the life-size.
How to Find the Exposure
Compensation Value
1. After focusing the lens, read the
extension amount through the bellows
extension scale (10). (Photo 8)
2. Find the compensation value by the
bellows extension scale/exposure com-
pensation value scale located on the
right side of the close-up photography
table.
For example, assume that i27mm
lens is focused after combining it with
No. 2 auto extension tube. If the exten-
sion amount reads 31 mm by the bellows
extension scale (lo), it is understood
that the compensation value is +2 steps
by the scale located on the right side of
the close-up photography table. In this
case, use two steps slower shutter
speed or two steps larger aperture
(smaller f-number), thus increasing the
exposure.

@ 5 Z!E Close-up Table

1. ‘Subject Distance” refers to the dis- extension, and the right-hand row indi- compensation, the line dividing two
tance between subject and front rim of cates the result when set at maximum zones should be read as l/4 stop. Thus,
the lens. bellows extension (46mm). the line between the + 1 and + 1.5 areas
2. In columns of the Close-up Table that 3. For clarity, the exposure factors in the represents +I l/4. Similarly, the line di-
have two rows of figures, the left-hand right-hand column of the table are shown viding the +1.5 and +2 zones represents
row indicates the result when lens and in l/2 stop increments (+l, +1.5, +2, +1 314.
tube combination is set at zero bellows +2.5); however, for precise exposure

Specifications and appearance are subject to change without notice. Printed in Japan