What is "cinemiracle"

Cinemiracle was a widescreen cinema format competing with Cinerama developed in the 1950s. It was ultimately unsuccessful, with only a single film produced and released in the format. Like Cinerama it used 3 cameras to capture a 2.59:1 image. Cinemiracle used two mirrors to give the left and right cameras the same optical center as the middle camera. This made the joins between the projected images much less obvious than with Cinerama.