Why does the SIGMA 50mm F1.4 DG DN | Art make a sound when the lens is shaken?

The focusing lens group of SIGMA lenses equipped with the HLA (High-response Linear Actuator) motor is not fixed in position when the power to the lens is off, which means the lens may make a sound when shaken along the optical axis. This is completely normal.

Article ID
20085
Release Date
2023.01.31
Modified Date
2023.01.31