Canon POWERSHOT A720 IS User Manual page 39

Appendix
1179
Converter Settings
Settings for when shooting using [IS Mode] (p. 68) with the separately
sold Wide Converter WC-DC58N, Tete-converter TC-DC58N or Close-
up lens 250D attached.
When you remove the converte r fro m the camera! retur n the
converter setting to [Off].