Canon's Err99: the Man, the Myth Because of Canon’s corporate belief that “If we release no information about it, the problem will go away”, there is little factual information to debunk the online myths regarding Err99 unless you really do a lot of digging. I thought I’d write a summary of what I found and what we’ve experienced here (with 700 Canon lenses and 4 dozen Canon bodies, we have a bit of Err99 experience). By CoeurDeLionin Public bookmarkswith 99canonerrorlenslensesphotographyrental