The Zeiss Supreme Prime 15mm T1.8 Lens offers the same full-frame sensor coverage, consistent color, gentle sharpness, and dynamic range as the rest of the Supreme Prime line. The fast T1.8 aperture of the Supreme Prime 15mm lens reveals deep shadow details in low-light capture, and smooth transitioning between in- and out-of-focus areas produces pleasing focus falloff and greater depth in the image.