Full-frame and 46mm imaging circle. Maximum micro-contrast control and ultra-low chromatic aberration for unparalleled image quality. Large aperture of T2.2 and soft bokeh for beautiful background separation. Rear mount filter mount for a more flexible workflow and creative control for filmmaking. Precisely engineered to minimize focus breathing, maintaining a consistent field of view during focus adjustments. Matched in weight and size to other NiSi Athena lenses, eliminating the need for rebalancing on a gimbal when switching between lenses. 77mm filter thread and matched aperture and focus rings across the range for easy use of lens accessories. Focus ring with 300° rotation and fluorescent focal scales for accurate, easy-to-read focus pulls in any lighting condition. Offers unparalleled image quality, flexibility, and creative control for filmmakers.