It's a question photographers have been asking since time immemorial – or since the 1970s, at any rate: which is best? Canon or Nikon? The brave souls over at the Hydraulic Press Channel are committed to finding out. And they're going to do so in the only way they know how - by using a hydraulic press. In the yellow corner: a Nikon FA. In the red corner: a Canon AE-1. 

We don't want to ruin the outcome of this unconventional two-way test before you've watched the video (apart from anything else, we're far from clear on the criteria of the contest) but we dare you to only watch it once.