Sigma 180mm f/3.5 APO Macro IF HSM - Sigma SA, Canon EF, Nikon F, Sony A, Pentax K Mount

The Sigma 180mm f/3.5 APO Macro IF HSM is a long-focal-length macro lens offering a 1:1 magnification ratio. The 180mm reach provides a generous working distance, making it suitable for photographing skittish insects or subjects where additional space for lighting is required. It features Internal Focusing (IF) and a Hyper Sonic Motor (HSM) for quiet, relatively quick autofocus, alongside apecture-stop versatility for depth-of-field control in close-up work. When purchasing a used copy, inspect the tripod collar for smooth rotation and ensure the locking knob secures firmly. The HSM motor should be tested for consistent operation without unusual high-pitched noises. SDS checks the internal optics for dust or fungal growth, which can occur in older telephoto designs, and verifies that the manual focus override ring operates smoothly across the full range.