180mm · f/5.6
The Sigma 180mm f/5.6 APO Macro UC is a compact, internally focusing tele-macro lens with floating elements, offering excellent sharpness even wide open and smooth bokeh. However, it suffers from poor flare control and reduced contrast in glare, and its build quality is inconsistent due to the notorious 'ZEN' rubber finish that degrades over time. It is best suited for macro enthusiasts who can work with careful lighting and are willing to buy used, as it is discontinued and typically found for $50–200.