Quoted By:
Canon used to have the most aggressive marketing department.
But in recent years that has shifted into Fujifilm and Sigma as the most rabid marketeers.
Most people generally don't notice the Sigma marketeering though, since they usually do a good job at not attacking the other camera and lens manufacturers.
The Fujifilm marketeers have failed quite hard on that aspect though and have drawn a lot of ire across the whole spectrum.