Sinar f2 - Locating the plane of sharpness with the SINAR p2 und c2; Locating the plane of sharpness with the SINAR f2 and f1

The
plane
of sharpness
and
depth
of field
Locating
the
plane
of sharpness
with
the
SINAR
p2
und
c2
Always
establish
the
plane
of maximum
sharpness
before
stopping
down.
select
this
as an imaginary
subject
plane
with
the
greatest
near-io-faispreao
of required
object
points.
Locating
the
plane
of sharpness
with
the rear
standard (controls
both
sharp-
ness
distribution
and
perspective)
-
Always
set
the
standards
vertically
with
the
coarse
tilt
g.
-
with
the
fine
focusing
drive 2
sharply
focus
a suitable
first
image point-
on
the
horizontal
axis H
(or
on
the vertical
axis V
for
a vertical-axG
swing).
-
with
the
micrometer
drive
5
(or
6
for
vertical-axis
swings)
focus
on
a suit-
able
second
image
point
-
roughly
opposite
the
first
-ln
the
shaded
area
of the
screen.
Locating
the
plane
of
sharpness
with
the
lens
standard (controls
sharpness
distribution
but not
perspective)
-
Locate
the
plane
of maximum
sharpness
with
the
rear
standard
as
oe-
scribed
above,
then
read
off the
tilt
or swing
angle.
Direct
tilting
and
swinging
with
the
lens
standard
is
not
satisfactory
as its
optical
setup
always
involves
an
overall
sharpness
shift.
-
Then
tilt
the
lens
standard
-
in
the
same
direction
-
to the
same
angle.
-
Return
the
rear
standard
to its
zero
engagement point.
-
Refocus
with
the fine
focusing
drive
2 for
maximum
overallsharpness.
Ad-
just
the
rear
standard
for
any
final
correction
to the
plane
of
shäpness.
.,lf
there is
nosuitable
image
point
on
the tilt
or
swing
axis itself,
select
one nearest
to
that
axis
and focus
as described.
Repeat
the
adjustäent
sequence
until
the image
is
sharp all
over.
Locating
the
plane
of sharpness
with
the
SINAR
f2
and
fl
Always
establish
the
prane
of maximum
sharpness
before
stopping
down.
select
this
as
an imaginary
subject
plane
with
the
greatest
near-to-faispread
of require
object
points.
-
with
the fine
focusing
drive
2
sharpry
focus
a first
image
point
on the
horr-
zontal
axis H
(or
on the
vertical
axis V
for
a vertical_axis
swing).
-
Set the
angle-metering
scale
6 to zero.
-
with
the
fine
focusing
drive
2
sharply
focus
a
second
image
point
on the
opposite
axis
H'
(or
V').
-
Read
off the
tilt
angle
and
direction (+
or
-)
on
the
angle-metering
scale
6
(for
example
+12').
lf
the range
of the
angre-metering
scare
is not
sufficient,
tirt the
camera
setup
ap-
proximately
before
measurement,
using
the
intersecting pranes
principi".
----
'
-
set
this
angle
(12")
and
direction
(here
+)
on
either
the
image
or the
lens
standard.
-
Fine-focus
2
for
optimum
overall
sharpness.
Adjust
the
rear
standard
for
any final
correction
to
the
plane
of
sharpness.
Lens
tilts
and
swings
with
close-ups
with
close-ups
(subject
distance
less
than
five
times
the
focal
length)
any
lens
tilt
causes
additional
problems
as it
also
modifies
the
subject
oi-sänce.
Here
it is
therefore
better
to
control
sharpness
distribution
with
the rear
stan-
dard
only. lf
you
still
want
to tilt
the
lens
standard,
adjust
the
lens
tilt
first
by
visual
sighting
(Fig.
a4
to make
the
planes
of the
subject,
lens
and image
meet
in
a common
axis.
Make
any final
adjustments
again
on the
rear
stan-
dard.
_
_L
Fig.39
Fig.40
Fig.41
i-
,a lF;E
(
ti Hlo+
r-@-;
DO
l-@-.i
11