Sigma 40mm f/1.4 DG HSM | Art - unknown Mount

The Sigma 40mm f/1.4 DG HSM Art was originally developed to meet the requirements of high-end cine lenses, resulting in exceptional optical performance and a heavy, substantial build. It provides a unique focal length between 35mm and 50mm, offering a very high degree of sharpness and minimal distortion even at f/1.4. It is widely considered one of the sharpest lenses in the Art series. Due to its significant weight, the mount and internal barrel structure should be checked for any signs of stress or impact damage. SDS ensures the autofocus system remains calibrated and responsive. Inspect the glass for any internal haze or fungus, particularly in older examples. The manual focus ring is large and should rotate with a consistent, dampened feel. Check the rear gasket for integrity if using in adverse conditions.