Its 21mm f/3.4 design uses one aspherical and four ED glass elements, ensuring sharp, distortion-free images from a durable metal body that is just 2.1 inches long. The manual focus ring offers precise control down to a 70cm distance, paired with an 11-blade diaphragm for smooth background blur, all at a competitive price point. This lens is best for street photographers and landscape shooters who want a compact, robust 21mm prime with deliberate manual operation.