My understanding is those since the dawn of time setups generally needed "post-processing, retouching, or other image manipulation". The desire for something l

My understanding is those since the dawn of time setups generally needed "post-processing, retouching, or other image manipulation". The desire for something like this might be obvious but the actual multiple moving parts they've arraying to achieve it in fact constitutes an invention. There might be many ways of achieving the same result -- those different setups are also inventions. Go take a look at how many patents there were for light bulbs before Swann and Edison.