Nikon LS-30 Reference Manual page 30

Landscape (wide) slide
Using the Scanner: Using the MA-20 S M A
LIDE OUNT DAPTER
Do not insert slides with the longer side of the aperture facing
the scanner. The scanner will be unable to scan the edges of
the film.
Note: The best possible results can be achieved only with clean
slides. Before scanning, remove dust from the film with a blower
and wipe the slide gently with a soft, dry cloth to remove finger-
prints.
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