U.M. 3
Depth-of-field
Scale
The
depth
-
of-field
scale
indicates
the
range
of
subjects
which
will
be in
sharp
focus
on
the
film
.
This
range
will
vary
with
the
following
factors
:
The
depth
-
of-field
will
be d
eeper
the
smaller
the
lens
aperture,
the
further
the
dis-
tance
of
the
subject
,
and
/
or
the
shorte
r
the
lens
focal
length
.
The
depth
-
of-field
will
be
shallower
the
larger
the
lens
aperture
,
the
nearer
the
distance
of
the
subject,
and
/
or
the
longer
the
lens
focal
length
.
34
f/ 8
50mm
Depth
-
of-field
2.3m-4
.
3m
Focused
at
3m
0
For
example,
if
the
lens
is
50mm
and
the
subject
has
been
focused
at
a
distance
of
3m
,
with
an f/8
aperture,
the
depth-of
-
field
would
be
from
approximately
2.3
m
to
4 .
3m
as i
ndi
cated
on
both
sides
of
the
distance
index.
0
f/
16
50mm
Depth
-
of-field
l.9m-7
.
6m
Focused
at
3m
S
imilarly,
if
the
aperture
is f/
16,
the
picture
will
be
sharp
between
l.9m
to
7.6m
from
the
camera
.
This
range
will
vary
with
the
f/
stop
selected.
•
FL
series
of
the
Canon lenses have a f
eatu
re
w
hich
lets you see
the
actual
sharp
ness
through
the
vi
ewf
inder
by
turning
the
manual
aperture
ri ng.
Lens
Mount
(
FL
and R Series Lenses)
As
the
lens
mount
for
the
Ca
non
FT
QL
is
the
same
as
for
Canon
FX
.
FP
, PELL\X and PELL\X
QL ,
it
is
possible
to
use all
FL
lenses
except
the
FLP
38mm
F 2
.8
lens.
•
It
is
possible
to
attach
and
use all
th
e R
series lenses
for
CANONFLEX use.
However
,
as
th
e pre-set
aperture
mechanism
differs
,
pictures
must
be
taken
with
the
manu
al
a
pertur
e.
35