Large F2.8 aperture and superb image quality Exceptionally compact and lightweight body ideal for mirrorless cameras Supports various shooting situations Lens construction: 13 elements in 10 groups, with 1 SLD and 3 aspherical elements Inner focus system Compatible with high-speed autofocus Stepping motor Compatible with lens aberration correction Support DMF and AF+MF Super Multi-Layer Coating Petal type lens hood (LH582-02) Mount with dust and splash resistant structure Designed to minimize flare and ghosting Every single lens undergoes SIGMA's proprietary MTF measuring system 7-blade rounded diaphragm High-precision, durable brass bayonet mount Made in Japan craftsmanship