Hasselblad Xpan - Page 38

clockwise into the tripod
socket a
few
turns.
Ensure
the alignment pin
on
the plate matches its respective
socket
in
the camera baseplate and continue
to
screw
thebolt until
it
is securely attached.
Spirit-level
rffi,ffi,lli.*}$*-H
The dual-directional
spirit-level simply fits into the
flash hot-shoe
and
provides
a check for both horizon-
tal and vertical photography. This
can be
particularly
useful when photographing
buildings, for example. In
these cases the
use of a tripod
or
stable camera support
is
particularly
recommended.
Ensure, however,
that
it
is fitted correctly; see
illustra-
tions. Note the difference
depending on whether the
camera
is in
the
horizontal
or the vertical
position.
Checkthat the spirit-level has been
pushed
all the way
into
the shoe as
far
as
it
will go. Remember that the spir-
itlevel is
intended
to
be an aid
in
levelling and
cannot
guarantee
complete accuracy. Check the
image
careful-
lyin
the viewfinder.
lu-sky
fi!!
The
UV-Sky filter XPan
(54460)
is
designed
for
use with
the Hasselblad 4/45mm and the Hasselblad 4l90mm
lenses. The filter
absorbs some of
the ultra-violet
ravs
present in light
which cause
the appearance of.
haze,
particularly noticeable in photography at high alti-
tudes, for example. The use of a UV-Sky
filter
can
reduce this effect somewhat and also cause a slight
warming
of
tone
on
colour
film.
The filter
can safely be
left
on the lens
for
most
photo-
graphic applications as it provides
some
protection for
the
lens'front
element
not
only against dust and
rain
etc but also against
scratches and
accidental damage.
The filter is multi-coated
to ensure
high
anti-reflection
quality.
No degradation
in MTF
is seen and there is
no
shift in focus.
Centre
filter XPan for 45mm
TheCentre filterXPanfor45 mm
(54453)
is
designedfor
use
mainlywith the Hasselblad 4145-mmlens
(24015).
The 45 mm lens is free
from
vignetting with
panorama
format images
at
lens
aperture settings
smaller than
fl8. However, natural light fall-off
(a
basic
law
of
phys-
ics)
reduces
the exposure at the corners of
the image by
roughly 1f-stop.
This light fall-off
at the corners causes
visible effects
in critical photography when using transparency
film.
When using
negative film,
however, natural
light fall-
off
present
in traditional optical
printing
set-ups
(most