Sigma 35mm f/1.4 DG HSM Art Lens (for Canon DSLR Camera) Bundle Includes Manufacturer Accessories + 3 PC Filter Kit + Lens Cap + Lens Pen + Cap Keeper + Microfiber Cleaning Cloth Aperture Range: f/1.4-16 Hyper Sonic Motor (HSM); Compatible with Sigma USB Dock Floating Internal Focus System; Minimum Focusing Distance: 11.8 Anti-Flare Super Multi-Layer Coating; Special & Front Filter Thread Diameter: 67mm; 9x Circular Aperture Blades