Bronica SQ-B User Manual

Distance
Scale and Depth-of-Field
Scale
t
t
A. Distance
scales
on the Zenzanon
PS lenses
can
be used for focusing
at the required
distance
or
finding
the
distance
actually focused.
Simply rotate the focusing
ring
and
set the required
distance
opposite
the
orange-colored
index to focus
on an required
distance.
B. There
is
an apparent zone
of
sharpness,
the depth
of
field,
both
in front
and back
of the focused
sublect.
The depth-of-field
scale
shows
the zone
of apparent
sharpness
at any lens
opening
or
distance
and
can be utilized for
ascertaining
the
depth of field. The
depth-of-field
scale is
next to the
distance
scales
and
is
made
up of
identical
pairs
of apertures
on both
sides
of the
orange-colored
distance
index. These
identical
pairs
of apertures
indicate
the
distance zone in focus
at these lens
openings. For
example, if
the
80
mm lens,
stopped
down to t/22, is
focused
at a
distance of
3
m
(10
ft),
the
depth-of-field
scale
shows that
the zone will
extend trom
2 to 7 m
(7
ft. to 23
ft.) atl/22.
(See
the
depth-of-field
table for
the
Zenzanon-PS
80 mm lens,
on
page
36.)
In infrared
photography,
some
adjustment must
be made in
the
focus
in
order to retain
sharpness
on the film,
Because the invisible
infrared rays
are longer in
wave
length than
the visible rays
used
for
focusing.
For
infrared
photography:
1.
Use a R filter
or equivalent with
an infrared
(black-and-white)
film.
2. The
red-colored line,
next to the
orange-colored
distance index,
is
the infrared index.
3. After focusing in
the normal
manner, re-set
the
distance
indicated
by the orange-colored
OepOofno|d
raryoelft22,
23

Bronica SQ-B Specifications

General

Brand	Bronica
Model	SQ-B
Category	Digital Camera
Language	English