Sigma 17-40mm F1.8 DC | Art for L Mount

• Standard zoom lens with a constant F1.8 aperture Rendering capability comparable to a prime lens Highly portable and versatile for any situation HLA-driven high-speed autofocus Practical and stable inner zoom Minimal focus breathing Aperture ring with various functions Dust- and splash-resistant structure Water- and oil-repellent coating Equipped with two AFL buttons Designed to minimize flare and ghosting