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12.
Cable release port
13.
Shutter speed ring
14.
Accessory mount
Apo-Grandagon 4.5/35 mm
The compactness of the Apo-Grandagon 4.5/35 re-
quires slight differences in design and operation
which are as follows:
a. The focusing ring has an extension in the form
of a lever to facilitate adjustment.
b. The open/close shutter lever has an extension
to facilitate access.
c. The lens must be attached and removed with-
out the cable release in position.
Grandagon - N 4.5/75 mm
Although removable, the Extension tube 26
ArcBody is intended to be an integral part of the
Grandagon - N 4.5 /75 and must always be attached
to the lens when in use.
Lens operation is as follows:
Fit the lens to the camera body as already de-
scribed.
Viewing: Open and close the lens by moving the
open/close shutter lever.
Focus: Focus the lens by rotating the focusing
ring until you obtain a sharp image of the subject in
the viewfinder. The distance between the subject
and the film plane is read off the focusing ring's dis-
tance scale opposite the central lens index.
Shutter: To set the shutter speed, rotate the shut-
ter speed ring until the red index mark is aligned
with the desired speed.
Aperture: Move the aperture ring until it aligns
with the desired position on the aperture scale.
Depth-of-field: Objects closer or farther away
than the selected focusing distance may also be
rendered sharp, within specific limits. The limits of
this field of sharp focus – the depth-of-field – vary
according to the aperture size and focus setting.
This field can be visually checked on the focusing
screen when the desired aperture has been select-
ed, or read off the depth-of-field scale on the lens.
The depth-of-field available at any given aperture
setting can be read off the focusing scale opposite
the appropriate marks on the depth-of-field scale
on both sides of the central index. As an example,
fig. 18 indicates how to read the depth-of-field
scale at an aperture of f /11 and a focus setting of
ca. 2 m (ca. 6.5 ft). This combination would pro-
vide a zone of acceptable sharpness stretching from
ca. 1.4 m (ca. 4.5 ft) to ca. 5 m(ca. 16.5 ft)
Flash synchronization: Attach cord from flash
unit to the flash sync terminal. There is flash syn-
chronization at all shutter speeds.
To ensure the brightest possible view-
finder image, remove all filters.
Do not forget to stop down to the de-
sired aperture setting before exposure.
33
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