Sigma 150mm f/2.8 EX APO DG Macro HSM - Sigma SA, Canon EF, Nikon F, Sony A, Four Thirds Mount

This telephoto macro lens offers a 1:1 magnification ratio with a longer working distance than standard macro lenses, making it ideal for photographing insects or skittish subjects. It features two Special Low Dispersion glass elements and an internal focusing system powered by an HSM motor. Designed for full-frame cameras, it includes a removable tripod collar to balance the lens on a tripod or monopod. Check the tripod collar for smooth movement and ensure the locking knob functions correctly. The 'EX' finish on older versions can be prone to scuffing and wear, so the barrel condition should be noted. SDS checks the diaphragm blades for oil and ensures the autofocus motor moves the heavy internal glass elements smoothly without hesitation or grinding noises.