ARRI Signature Prime lenses are complex pieces of precision-engineered mechanical hardware. The product design combines up to 27 pieces of glass with a unique magnesium casing that is 20% lighter than aluminum. The hardened aluminum gear rings are less prone to wear from friction and don’t have magnesium’s flammability. The section between the rings is wider than on other lenses for easier handling, and to give more space for lens motors down one side, leaving scales visible. But these lenses aren’t the end-product, they are industrial tools designed to help the world’s finest cinematographers capture images with feeling, emotion, and warmth.