There's the popular 6x4.5, but other camera makers also released medium format cameras that shoot 6x6, 6x7, 6x8, 6x9, and 6x17 negatives. You'll usually know what aspect ratio a camera shoots by ...

Ok, a few of the 6x6 cameras found their way to me ... That becomes an 80mm on medium format, a 110mm lens on 6x7, and finally 150mm on a large format! I have seen so many people do it - spend ...