After extensive research and development, we present the NiSi Athena Prime 50mm T1.9 Full Frame Cinema Lens for Sony E Mount, a no-drop-in filter model. This high-quality, professional lens is engineered with an emphasis on maximum micro-contrast control and ultra-low chromatic aberration, delivering unparalleled image quality with enhanced fine details. The large T1.9 aperture and soft bokeh of this lens create a beautiful background separation, making it an ideal choice for capturing stunning images and videos in various lighting conditions. The lens is meticulously designed to minimize focus breathing, ensuring an extremely small change in the field of view when adjusting focus from the minimum focus distance to infinity. This feature is particularly beneficial for filmmakers who need to maintain a consistent field of view when focusing on their subjects.The NiSi Athena Prime 50mm lens is part of the Athena Prime Series, known for their matched weight and size.