Operation Manual
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The adapter attaches
to the camera
body
in
the
samewayas
the
magazine.
The image on the screen
can be
viewed through
any
Hasselblad viewfinder
and
focusing
hood.
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1. Set the
shutter to
B.
2.
Set
the
lens
to
the
maximum aperture
(f14.5).
3. Set the
time exposure
lock to
'T'and
press
the
shutter
release button.
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4. To check the
depth-of-field
select
the appropri-
ate
working aperture.
5.
After
checking
return the time
exposure
lock
to
'O'.
This closes the
shutter.
6. Wind
the camera to
cock the
shutter.
Replace
the
focusing screen
with a
magazine.
Meter prism viewfinders
PME51 and
PME90 can
be used
for accurate
light metering on the
screen
of the
Focusing screen adapter
SWC.
The
Meter prism
viewfinders
PME3 and
PME5
also
provide correct
metered values.
However,
older
Meter prism viewfinders,
Focusing screen
adapters
or their
combined
use
require a
reduc-
tion of the
metered
value by
I
-
2 stops.
Experiment to
determine
the
precise reduction!
Even
at the
widest aperture
the
image
produced
by
the
Biogon
T*
CF
4.5135
mm lens
is
char-
acterized
by extraordinary
sharpness
and
brilliance.
This together
with the very
low
radial
distortion
and the
remarkablywide
focusing
range
from
0.3
m to o
makes it very suitable
for
archi-
tectural,
fashion,
industrial and technical
photo-
graphy
or
whenever the
highest
image quality
is
required.
The
graphs
(figs
49-51)
represent the
typical
characteristics
of
MTF
(Modulation
Trans-
fer Function),
Relative
Illumination and
Radial
Distortion.
In the graphs
the
horizontal axis
represents
the distance
from
the
image centre.
The graph shows
the
Modulation
Transfer
Func-
tion,
which
is
a
representation
of the overall
lens
quality,
for a spatial
frequen cy of
2Dline-pairs/
mm
at an aperture
of
f/S.
A flat
curve
with a
relative
value
near 1.0
indicates a high
quality
recording
with
small
losses only.
This graph
represents the
fall-off of
illumination
from the
image centre,which
is given the
value
1.0,
towards
the edges.
It includes
"natural
fall-off" as
well
as vignetting.
Optical
properties
distance
from the
image
centre of an
image point