Many thanks for clearing that one up. I was unaware of the marked difference in appearance of the two lenses. The video clearly shows McCullin with the 75mm.
I've recently gotten into the press system and the 65mm ends up on my camera a lot simply because of how compact it is. Makes walking around with it much less hassle.
Still curious about the 75mm but I haven't yet found one for a price I'm willing to pay