Nikon cornered the hire market, meaning professionals could borrow equipment they needed, often on credit, from their local shop. Canon were late getting into that game. I never got the sense of Canon having an ongoing pro heritage, as Nikon had with their F series, until the EOS 1 cameras. Perhaps the UK market in the 70s differed from others, but the only F1 owners I knew were keen amateurs or semi-pros.
Originally Posted by Mackinaw