Back in the days of film, the 6x6 format was highly popular among a lot of photographers. Even today, a lot of photographers would still love to have a square format digital sensor. This great video discusses a wealth of 6x6 film cameras, what they are like to shoot with, and the sort of images you can take with them.
Coming to you from Steve O'Nions, this great video takes a look at unique square format 6x6 film cameras. For those keeping score at home, a 6x6 film negative is approximately 4.17 times bigger than a 36x24mm full frame negative, giving a vastly different look. A lot of photographers really loved the square format, both for its look and for its versatility. The versatility came from both its symmetry and the geometric fact that the largest rectangle that can be inscribed in a circle is a square, meaning a square negative maximized how much area one could get from a lens' image circle (save for more exotic shapes). Personally, I have had a 6x6 Rolleiflex TLR from 1949 for about a decade now, and it is by far my favorite camera to shoot with. The waist-level TLR experience is quite unique, and the negatives that come from the 75mm f/3.5 Zeiss Tessar lens are gorgeous. Check out the video above to see more on these very neat cameras.