The Athena Prime Lens Series (PL mount) is equipped with a rear filter mount, which provides a more flexible workflow and creative control for filmmaking. Filmmakers can easily add ND filters, polarizers, or other filters to achieve their desired look without having to attach filters to the front of the lens. This feature also makes it easier to swap filters quickly and efficiently, saving time and reducing the risk of lens damage. The lens has been designed to minimize focus breathing, ensuring that the change in field of view when adjusting focus from the minimum focus distance to infinity is extremely small. This feature is particularly important for filmmakers who need to maintain a consistent field of view when focusing on their subject. With the Athena Prime Series lens, filmmakers can achieve precise focus pulls and maintain a consistent look throughout their shots. In addition, the NiSi Athena Prime lenses are matched in weight and size with other lenses in the series, eliminating the need for rebalancing on a gimbal when switching between lenses. The matched aperture and focus rings across the range also make using lens accessories such as focus gears easy. The focus ring features 300° of rotation with fluorescent focal scales for precise focus pulls, making it easier for filmmakers to achieve their desired focus.