Nikon LS-4500AF User Manual page 48

6. Using the Film Holder
Step 2
If the mask needs to be replaced, remove the mask from the mask position-
ing pins on the turntable, and fix the new mask in place, fitting the mask
positioning holes over the mask positioning pins. (The holes are of differ-
ent sizes, corresponding to the different-sized positioning pins.) Slightly
raised bars provided as a guide for the outer edges of the film will be
visible on the upper side of the mask.
Mask Positioning Holes
Turntable
Nikon
28
Film Scanner LS-4500AF User's Manual