Each Opus is characterised by a gallery section of stunning portraits taken on the rare Polaroid 20 x 24 Studio camera.

This huge piece of photographic equipment, 5ft high and weighing 235lb, was originally developed to enable the accurate reproduction of works of art such as paintings and tapestries. However, seeing the superbly-detailed 20 x 24in (50 x 60cm) prints the camera produces, photographers soon started to use it as a creative tool.

The Studio camera uses a continuous roll of film rather than separate sheets; the negative is destroyed in the process, so each print is a genuine one-off. The patterning around the edge of the image (produced by the developing chemicals) is similarly unique to each print. As for the distinctive sepia tinting, this is the result of deliberately using mismatched components, a quirky film combination that produces some beautiful imagery.

For XL Super Bowl The Opus, the Studio camera was set up in Detroit throughout the week of the 40th Super Bowl especially for the assignment. Over two days, Walter Iooss Jnr, one of the world's foremost photographers, used this large-format photographic technology to portray MVPs, from Bart Starr to Emmitt Smith, Joe Namath to Tom Brady, Franco Harris to Deion Branch, as you've never seen them before…

The 20 x 24 Polaroid Land Camera