At almost 5.5 inches long and 2 pounds (with tripod collar), this lens will strike many as big. Compared with similar macro optics, such as Sigma's 2.5-pound, 180mm f/3.5, however, it's svelte. The barrel is finished with Sigma's matte black "Pro" surface, and features distance and magnification scales. A focus limiter has settings for full, 1.7 feet to infinity, and 1.1-1.7 feet; the latter comprising the range from 1:1 to 1:2. The broad, ribbed rubber manual-focusing collar's action is well-damped through a long turning radius -- well-suited to precise focusing. AF is quiet and accurate, if somewhat slow.