As in I need glasses or something. Oh wait, I wear glasses. Recently acquired (from an APUG member and in excellent condition) an F100 and the purchase included a lens, auxiliary battery pack, the original manual plus the Magic Lantern tome AND a data back. I never had a data back and thought, why not use it. I misread the custom setting instructions thinking enabling it would print the configured date on the first blank frame only. Wrong! Unless you disable it after that first imprint, it does so on every frame. Live and learn.