The 45-450 has the same front diameter as the Cooke 35-140 and 300 mm, same 300 degree focus and 90 degree iris rotation. It has long been written that a 10:1 is an essential part of any camera/lens package. The new Cooke Anamorphic 10:1 will be a welcome addition for all kinds of setups: close-ups, action, stunts, landscapes, and distant vistas where matching Cooke look and oval bokehs are desired.