This was the first Canon with an all-diecast chassis. It had the same film advance and rewind knobs and single-piece viewfinder mode selector lever which were introduced on the III A. The camera was first called IV F and later renamed IV S.
| Shutter | - |
| Viewfinder | - |
| - Magnification | - |
| - Coverage | - |
| Power | - |
| Size | - |
| Weight | -- |