User manual
T
HE
F.
& S. Aero Camera is
handled
in prac-
tically
the
same
manner
as a
gun.
Grasping
the
under
support
H
of
the
camera,
with
one
hand,
and
the
pistol
grip
with
the
other
hand,
the
instrument
is
aimed
at
the
object
by
means
of
the
front
and
rear
gun
sights
SS.
The
exposure
is
made
by pulling
the
trigger
E
with
the
index
finger.
The
Graflex Focal
Plane
Shutter,
built
into
the
camera, consists
of
a long
curtain
with
a
number
of
fixed
apertures
of
varying
size.
This
curtain
operates
as closely as possible
to
the
surface
of
the
plate
or
film
when
in position for
exposure.
The
duration
of
exposure is
regulated
by
the
size
of
the
curtain
aperture
employed,
and
the
rapidity
of
its
movement
across
the
exposure
plane.
The
shutter
is capable
of
a
range
in
speed
from "
Time
"
to
Ttfoo
part
of
a second.
The
shutter
should
be
set
to
operate
at
a
speed
that
will obviate
blurring
of
the
subject
in
the
neg-
ative,
due
to
the
vibration
and
rapid
movement
of
the
Aeroplane,
and
render
photographic
records
of
the
terrain
with
clearness
and
detail
when
maneu-
vering
at
high
altitude.
Shutter
speeds
used
under
varying conditions
of
altitude,
movement,
01'
atmosphere,
may be
the
result
of
actual
experience
in service. A
shutter