The DZOFilm Pictor 50 to 125mm T2.8 Super 35 Parfocal Zoom Lens is a parfocal cine lens with a maximum aperture of T2.8 and an aperture range from T2.8 to T22. As one would expect from a cinema zoom, the lens is parfocal meaning it keeps focus across the entire zoom range. The internal focusing with floating elements virtually prevents the breathing of the focus. The lens covers a super 35 image circle, is equipped with a replaceable PL connector as standard and has an EF connection. The 16-fin aperture creates out-of-focus highlights that contribute to the natural-looking bokeh of the lens. The lens is equipped with cine-style gears on the rings for focus, aperture and zoom, making it compatible with cine accessories such as follow focus units, lens motors and lens control systems. The outer front diameter of 95mm allows the use of a variety of compatible third-party mat boxes, and the lens has a 86mm filter thread. With the lens support base, you can support the lens on rods to reduce the strain on your camera's lens port. Note: According to the manufacturer, this lens is not compatible with DSLR cameras that have an EF mount. However, it is compatible with mirrorless cameras that have an EF port, including Blackmagic Design cameras.