Nikon LS-10 Installation Guide for Macintosh - Manual (Page 54)

Chapter 4 Basi« Operation
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
«or 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 DPI.
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