Nikon LS8000 - Manual (Page 114)

104
When scanning with the FH-869GR, be sure to use a mask suited to the film to be scanned and
to align the frame to be scanned with the aperture in the masking sheet.
When using a 59mm by 82 mm electron microscope film, a 6 by 9 masking sheet should be
used.
Guide pins
Masking sheet
Aperture