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. Perfectly aligned characteristics, micro contrast, and color ensuring a seamless experience across the lineup. Matched iris and focus ring of other NiSi Athena 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.