Kodak RFS 3570 - Manual (Page 56)

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4-12  Loading the Film and Slide Holders — Macintosh Computer G
3. Place the film holder into the Scanner by sliding it down completely
into place behind the single-frame holder adapter; be certain that the
film holder is aligned with the indentation in the frame in the Scanner.
KOD AK Professional
RFS 3570 Film Scanner
Single-frame
Holder Adapter
The film holder is now properly inserted into the Scanner.