Viewfinder Mask for 120 FIlm in a 124 Camera

thingiverse

When shooting 120 film in a 124 camera, such as with the design from Thingiverse at https://www.thingiverse.com/thing:4548692, the image will be clipped vertically due to 120 being an inch narrower than 124 film. This part fits over a 'cube' type ground-glass viewfinder and gives a rough idea of the usable image area on 120 film. It does not interfere with flipping the viewfinder into portrait orientation, and the camera can still be folded closed with it attached. By pulling the mask up slightly, it provides a much-needed viewing shade for use in bright sunlight! It is designed to be a snug (but not too tight) fit that can be gently pushed onto the finder and stay in place. I have sized it to fit my Kodak Folding Brownie No.3, but the OpenSCAD source is included, so that it can be adjusted to fit other cameras with similar viewfinders.