Both zooms are parfocal in design and performance with a maximum aperture of f/2.8. The lens design features floating elements that virtually eliminates focus breathing. Each lens covers the Super35 image circle, comes standard with an interchangeable PL mount, and includes a Canon EF mount. The 16-blade iris creates round out-of-focus highlights, which have a more natural appearance and contributes to the lens’s natural-looking bokeh. The lens features cine-style gear rings on the focus, iris, and zoom lens rings, making it compatible with cine-style lens accessories such as follow focus units, lens motors, and lens control systems. The 95mm outer front diameter allows you to use a variety of compatible third-party matte boxes, and the lens has an 86mm filter thread. A lens support foot allows you to support the lens on rods to help reduce strain on your camera’s lens port.