× 5". By the 1930s 6 cm × 9 cm cameras for either the 120 or 620 film size, were highly popular. A 10" x 12" camera can also be self-made.

The use of folding cameras declined in the late 1930s with advances in lens technology allowing superior enlargement, high quality images on smaller negatives, and shorter distances between the lens and the film. 35mm film made small-sized cameras practical without using bellows. Lens technology allowed 120/620 cameras to use shorter focal distances,