While Leica gave the 35mm film format some respectability during the 1930a, 40s and 50s with its rangefinder cameras ... and interchangeable viewfinders. The features list included depth-of ...

We asked the owner of second-hand film ... operated 35mm single-lens reflex camera has its shutter speed dial around the lens mount. This means you can keep looking through the viewfinder between ...

which is exactly like the 35mm version, except that you have larger film. There's the twin-lens reflex (TLR) camera, which usually has a large viewfinder that you look down into, allowing you to ...