HLA is Sigma’s proprietary linear motor. It drives the focus lens directly without gears or other mechanical parts, resulting in quiet, high-precision autofocusing.
Sigma’s proprietary AAC technology uses a low-refractive-index amorphous layer for outstanding anti-reflective performance. By significantly suppressing the internal reflections that cause ghosting and flare, it delivers exceptionally clear, high-contrast images.
A water- and oil-repellent coating lets water be wiped away easily and prevents oil and grease from sticking to the surface, even in challenging conditions, making lens maintenance easier.
Aperture ring, designed to help users work intuitively.
A de-click function, set with the aperture ring click switch, removes the clicks for seamless operation, especially useful during video shooting.
A ring lock system prevents unintended movement of the aperture ring during shooting.
The AFL button can be assigned various functions, widening the range of operations available on the lens.
Switches the focus mode between AF and MF.
A highly effective dust- and splash-resistant structure with special sealing at the mount connection, manual focus ring and cover connection.
*Although this construction allows the lens to be used in light rain, it is not waterproof. Please prevent large amounts of water from splashing on the lens. It is often impractical to repair the internal mechanism, lens elements and electronic components if they are damaged by water.