The Kodak Brownie, a cheap consumer camera that sold in the millions, was a 120 camera that shot square pictures, same format as a Hasselblad or a Rolleiflex. The original Box Brownie came out in 1900 and was the most popular camera in the world for years going through various models up to the 1960s. That's how long the 120 square format was a popular consumer format.
> I can think of are twin-lens reflex cameras
> like the Rolleiflex, which are delightful
> but somewhat uncommon.
The Kodak Brownie, a cheap consumer camera that sold in the millions, was a 120 camera that shot square pictures, same format as a Hasselblad or a Rolleiflex. The original Box Brownie came out in 1900 and was the most popular camera in the world for years going through various models up to the 1960s. That's how long the 120 square format was a popular consumer format.