Close-up Photography with the Auto Extension Tubes
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Attaching and detaching the auto exten-
sion tubes
Attaching and detaching the auto extension
tubes is accomplished in the same manner
as with the lens. When initially mounting a
lens to the extension tube, cock both the
lens and the tube.
* The auto extension tubes couple with
the automatic diaphragm of the lenses.
NOTES
1. For exposure compensation, refer to the
following table. Reading of the exposure
compensation scale differs from that when
not utilizing extension tubes.
2. For close-up photography, we recom-
mend independent mirror-releasing prior to
each actual photograph. This omits or mini-
mizes any residual camera body movement
due to mirror action.
3. When photographing through the exten-
sion tubes, use as small an aperture as
possible.
4. When photographing in the 6 x 7 size,
if the 127mm lens is used, minimal or no
corner vignetting will occur, however, 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 vignetting 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. Since it will decrease resolving power
due to exceeding life-size, do not use the
auto extension tube with the 50mm lens.
Close-up photography table
1. Distance indicates the distance from the
front edge of the lens barrel to the subject.
2. The figures in the left column of the
close-up table indicate no bellows exten-
sion. The figures on the right indicate when
the bellows is extended to the maximum
(46mm).
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How to determine the exposure compen-
sation value
1. After focusing the lens, read the exten-
sion amount through the bellows extension
scale (A) on the top of the distance scale.
2. Find the compensation value by the
“Bellows extension scale/Exposure com-
pensation value” located on the right side
of the close-up photography table. For
example, assume that 127mm lens is focus-
ed after combining it with No. 2 auto exten-
sion tube. If the extension amount reads
35mm by the bellows extension amount
scale, it is understood that the compensa-
tion value is + 2 steps by the scale located
on the right side of the close-up photo-
graphy table. In this case, increase expo-
sure by setting the shutter speed dial two
steps slower or by opening the aperture by
two steps.
W h e n u s i n g t h e CdS f i n d e r f o r t h e
M a m i y a RB. exposure need not be com-
pensated, since the meter reads actual
exposure directly.
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