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put into effect, approximately ± 15° being possible.
Use a correction slide, if necessary, to improve the
brightness of the image.
Close-up photography
When the camera is very close to the subject, suffi-
cient sharpness may not be produced. This can be
corrected by fitting the appropriate extension
tubes. They fit between the lens and the camera
body and are attached and removed in the same
manner as lenses. However, the focus and depth-
of-field scales on the lens will then not apply, so a
visual check must be made on the focusing screen.
Choice of tube can simply be determined by exper-
imentation or by checking the table 'CU' at the end
of the illustration booklet that illustrates the exten-
sion tube/lens /magnification ratio possibilities.
The column to the left (A) denotes the extension
tube while the horizontal heading (B) refers to the
image scale range for each lens in three separate
columns. Look up the amount of magnification re-
quired under the correct lens heading to read off
which extension tube should be used.
Example. To produce an image 1/4 original size
(image scale 0.25) you could combine:
•
4.5/35 lens + 8 mm extension tube
•
4.5/45 lens + 8 mm extension tube
•
4.5/75 lens + 16 mm extension tube
If you combine two or more extension tubes, posi-
tion the shortest tube closest to the lens to mini-
mize vignetting problems when shift is used.
Use the minimal amount of shift with close-up
photography. This will then allow a greater amount
38
of tilt to be used without vignetting problems.
When you add a 26 mm extension tube or combi-
nation of tubes that includes a 26 mm to a 35 mm
or 45 mm lens, the use of a Correction slide 10˚or a
28
Correction slide 20˚ to improve image brightness
in the viewfinder is recommended.
Bellows
The bellows is made of natural fabric and is de-
signed to permit a combination of shift and tilt
movements.
However a combination of near maximum settings
should be avoided as this may cause the bellows to
distort. It is also advisable to keep the bellows
stored at the 'neutral' (10 mm shift) position when
not in use.
Exposure sequence
The ArcBody is a very simple camera to operate,
however, to avoid errors it is advised that you try to
adopt a specific routine that you always follow.
1. After setting up the ArcBody complete with
lens and focusing screen adapter on a tripod or
stand, set tilt and shift controls to zero.
2. Adjust the camera position using one of the in-
tegral spirit levels. This ensures that the back is
vertical and simplifies the need for further ad-
justments when working with architectural
perspect ive control, for example.
3. Screw the cable release into the cable release
port..
4. Push the open/close shutter lever to open the
shutter and obtain an image on the focusing
screen.
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