Kodak No. 2 Folding Autographic Brownie - Diaphragms

upon.
But it is
obvious
that with
the small stops
the exposure
must be correspondingly
lengthened.
The following
table will be a
help
in determining
the range
of
critical
definition or
depth of
focus
when
the No. 2
Folding
Autographic Brownie
Camera
(when
it is fitted with the Rapid
Rectilinear
Lens) is focused with different
stops:
Srors
U.S.4
U.S.8
U.S.16 U.S.32
U.S.64
Distance
Focused
Upon
100 Fr.
25
Ft.
RANGE OF SHARPNESS.
Ft. Ft.
Ft. Ft. Ft. Ft. Ft.
Ft. Ft. Ft.
8Ft.
l6s/
to rO16%
to
ll
|
6to 13
15%
to l8
l4r4
to
36
"Inf."
is the abbreviation for
Infinity-meaning an
infinite
distance from the
lens.
29
15
63,
Inf.
,66
r10
to
to
9to
s%t
%t
to
to
to
22
T4
6%
Inf
Inf,
11
1.2
61
06
nf.
nf.
36
toI
toI
to
I7
IT
6
In
Inf
18
co
to
to
13
e%
s%
9
nf.l
l'l
f.le
.It
l4
Ir
I:
3
to
rzt<
to
to
r1
o
o
C
o
O''''
4
u.s.
I
u.s.
l6
u.s.32
U,S.64
COPYRIGHT 1922
BY EASTMAN KOOAK COMPANY
Diaphra9ms
The
diaphragms,
sometimes
called
stops, should
be
used
as follows:
U.S.4-For
instantaneous
exposures on
slightl't cloudv
days'
T7
This
diagram
shows the
actual
sizes of the
stop open-
ings
or
diaphragms
of
the
shutter used
on the
No. 2
Folding
Autographic
Brownie
Camera
when
the camera
is
fitted
with the
Rapid Rec-
tilinear
Lens.
It clearly
shows
the relative
sizes of the
vari-
ous
stop openings
and the
dif-
ference
between
their areas.
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