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Chapter 4
Basic Operation
Film Strip
Holder
fully inserted - - - - - - - ......
1'"
Figure
4.16
The
film
strip
holder
ready
for
scanning.
Removing the Film Strip Holder
To
remove the film
strip
holder,
grasp
the portion that protrudes from the film
slot and
pull
gently
toward
you.
It
should slip
out easily. In the extremely unlikely
event
that the
film strip
holder
is
jammed inside the scanner slot, do not apply added
force
to
remove
it.
Such action
may damage the scanner. Instead, contact
your
Nikon
service representative immediately.
Focus
There
may be
instances when
it is necessary to adjust the focus wheel on
Coolscan's front
panel in
order
to
achieve
the best
sharpness.
The position of the focus
wheel
becomes particularly
critical when
a
high
resolution
scan is being performed. High
resolution scans typically range
from
2700
DPI (dots per inch) down
to
1350 DP!.
Image
focus
is affected
by the position of the film in the
scanner
with respect
to
the
optics
in the
scanner. The
parameter which most commonly causes focus problems
is the thickness
of
the
slide
mount. Fortunately,
Coolscan
utilizes a
self-centering stage
mechanism.
The
use
of
the focus
wheel will
not
sharpen
film
which
is
unfocused
to
begin
with.
If
you
must use
any
unfocused
film
there are
some software
image processing
techniques,
such as applying what
is called
an
Unsharp
Mask
that
can
be used
to
help
effect sharpening.
It
is
important to
realize,
though, that
you
cannot dramatically
improve
what is on your
film originally. If the original image is severely out of focus,
your
final
results may
not be
acceptable.
Thickness of the Slide Mount
There are a wide variety of slide
mounts in popular use. The thickness of these
mounts affects where
the
film will
be positioned
within
the
slide
mount itself and
conse-
quently
within the
scanner.
Another
factor affecting
the thickness of the slide mount
Nikon
Coolscan
Installation
Guide for Macintosh
Page
47
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