Description
Sigma 17-40mm f1.8 DC Art
- Standard zoom lens with a constant f1.8 aperture
- High-response linear actuator (HLA) for fast and quiet autofocus
- Internal zoom mechanism maintains lens length while zooming or focusing
- Minimal focus breathing for smooth video focus transitions
- Two AFL buttons are assignable via supported Sony cameras
- Aperture ring with click switch for stepped or smooth control
- Aperture ring lock switch to prevent accidental changes
- Super Multi-Layer Coating to reduce flare and ghosting
- Minimum focusing distance of 28cm at all focal lengths
- Maximum magnification ratio of 1:4.8 at the 40mm end
- Water- and oil-repellent coating on the front element
- Dust- and splash-resistant construction for outdoor use
- 67mm filter thread
- Weighs just 535g and measures 115.9mm in length
