The following chart shows the possibilities regarding lenses from different manufactorers on the SD14. At the left are lenses, with their mounts. If a mount has different color than the lens, a mount replace is possible/has taken place. Follow a line from a lens to a SD14, and see what's neccessary for  using that lens on a SD14. Red lines indicates that you would have to have a SD14 with its mount replaced with a Canon EF mount,  yellow lines points to a SD14 with a Nikon F mount and grey lines to a SD14 with a Leica R mount. The latter two are commercially available. Blue lines indicate a M42 alternative, which through a M42 to SA adaptor can connect to a SD14. Cyan lines are either SA or Pentax K. Look here for more details for each mount.

Use this link rather than the link above: http://www.foto.nordjylland.biz/SD14/sd14-nonsigmalenses.htm