canon has manufacture high-quality since it was founded in 1933 SLR camera are purchased in two parts: The body and the lenses. Photographers who want a canon product must make the upfront investment in the expensive camera body. Canon earns significant profit from the sale of camera bodies and then earns a stream of profits from camera lenses. An owner of a Canon camera body can also purchase lenses from other companies that produce Canon-compatible products. Would Canon be better off it there were no other firm that made Canon-compatible lenses?