Any lens projects an image with a circular (spherical lenses) or oval (anamorphic lens) shape onto the sensor. Inside this shape is the image area, which is the area within which the lens’ manufacturer guarantees the lens optical quality. However, there is still light outside the image area, all the way out to where there is no more light, which is called the illumination area. Both areas of most ARRI lenses are very large, since we wanted to make sure that if a customer shot Super 35 on a...