The Milvus 21mm f/2.8 ZE from ZEISS features a sophisticated optical design to control distortion and produce sharp, clean imagery with a dynamic perspective. For minimizing flare and ghosting, an enhanced ZEISS T* anti-reflective coating has been applied to benefit working in difficult lighting conditions. Additionally, Milvus-series lenses also feature an equally aesthetic and durable frosted, anodized metal lens-barrel surface along with a weather-sealed construction to protect against dust and moisture. Wide-angle prime is designed for full-frame Canon EF-mount cameras, however, can also be used with APS-C models where it provides a 33.6mm equivalent focal length. Distagon optical concept affords high sharpness, well-corrected image quality from edge to edge, and very low field curvature. ZEISS T* anti-reflective coating has been applied to each lens surface to help minimize reflections and provide greater contrast and color fidelity. Manual focus design is benefitted by focusing and depth of field scales along with hard stops at both infinity and minimum focusing positions. The all-metal lens barrel has a frosted, anodized surface along with a rubberized focusing ring for both durability and improved tactile control.