I started my professional journey when I studied for a part time certificate in commercial photography at the International College of Professional Photography, ICPP in South Melbourne in 2003/2004. I remember the entrance interview where we discussed what cameras I had and looked at the likely limitations of sticking with a Pentax consumer film SLR. As ICPP rightly pointed out, I was going to find the lens choices and performance pretty limiting and so I chose to upgrade fairly quickly with the only realistic choices in 2003 being Nikon or Canon. I had half an eye on where these two were up to with digital SLRs and the final thing that swayed my decision was previous experience with Nikon menus and ergonomics. Not saying they were bad, but the Canon operation and logic flow just clicked better with my brain and there was no downside to their lenses, accessories or support in Australia. So Canon it was with an EOS 33 film camera and the start of a lens kit that has evolved since. The reason why I mention the menus and logic flow is that as a working Pro you need to be able to operate the camera quickly, almost intuitively, for anything other than maybe still life images taken in a studio. I could and still can drive the 5D just about in my sleep and the other critical issue has been its unfailing reliability for many years of continuous use.