Sometimes my brain plays strange tricks. I inherited an old Canonet camera, circa 1963, complete with built-in light meter. For some reason it came into my head that I would need to get some black and white 35mm film for it. I mean, old camera equals  black and white. Of course that was nonsense. The lens and shutter don't care if it's colour or black and white film in the camera. And it's the film that capturing the light that's the key. In any case, there was colour film around in 1963. Maybe not great colour but colour nonetheless. There's even colour footage of the Second World War, a conflict most of us are used to viewing in black and white.