Sharper Image Slide and Negative Converter Owner's Manual page 11

TIP: Keep your picture in the rectangular white frame on
the screen. Improper positioning of the slide/negative
may result in copying the black edges of the film holder by
mistake.
NOTE: The holder can be inserted into either the left or
right side opening.
TIP: We recommend using the included brush to clean
the glass surface periodically. Gently insert the brush
into the film slot to remove dust and help produce a clear
image. In addition, please make sure your film negatives
and mounted slides are clean before inserting them into
the device. Any dust or dirt will affect the quality of your
digitized images.
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