A camera lens is a part of camera, and it is not used by itself. However, this I series has esthetics that can possibly make people purchase a camera just to get this fascinating lens. The ring with large convex areas provides easy handling. The outstanding design unique to SIGMA, which is never trend-conscious, symbolizes the series. The comfortable cold feeling of the outer design, which is all cut out of metal, the touch of a knurled screw, resistance from control ring, clicking noise of focus dial, graphics such as a tidy line of numbers, etc. – all elements that compose this product are precisely planned and designed at the highest level. In addition, we should not forget about the magnetic metal cap. The satisfying feeling as if it is sucked on the lens definitely makes us smile. There is no such thing as which-comes-first-the-camera-or-the-lens question, but we are not surprised even if it exists.