Here are some figures for 2007 to substantiate my two to one claim.
Thanks Tom. As with some of the links I provided, the data is aging. Given Nikon's "surge" I keep reading about, 2008 and partial 2009 data would be interesting.
BTW the second paragraph says:
"Canon sold 3.18 million single-lens reflex cameras in 2007 compared with Nikon's 2.98 million"
I realize now that you might be talking all cameras, not just DSLR. The last paragraph says:
"In the total camera market, Canon's 18.8 percent share of units shipped gave it the top rank. Next in line are Sony with 16 percent, Kodak with 9.6 percent, Samsung with 9 percent, Nikon with 8.4 percent, and Olympus with 8.3 percent."
That might suggest that Sony is giving Canon a run in the point-and-shoot market. That wouldn't surprise me, and is something I've observed with merging technologies over the years. Canon has a well deserved reputation in the SLR camera business, while Sony has a well deserved reputation in consumer electronics. Digital cameras, including DSLRs, are clearly a merging of technologies.
In a similar discussion held in this forum a number of years ago, someone suggested that the ultimate winner(s) will be the companies with the camera and lens experitise, rather than companies with the electronics expertise. What we're seeing in practice is that this is true for DSLRs, while a consumer electronics company such as Sony is doing well in the point-and-shoot market.
Sprinkle my observations/comments with a liberal helping of salt.