Sigma unveils the 17-40mm f/1.8 DC Art Lens, a groundbreaking zoom designed for APS-C mirrorless cameras with a constant f/1.8 aperture throughout the entire range. Delivering prime-like image quality in a compact, video-optimized package, this wide-to-normal zoom offers outstanding performance while keeping your kit lightweight and versatile.
Design and Performance
The lens features a total of 17 elements in 11 groups, with four aspherical and four Special Low Dispersion elements to minimize flare and ghosting and suppress various aberrations. This results in an optical performance that meets or exceeds that of other Sigma Art lenses, including the 18-35mm f/1.8 DC HSM Art lens. Along with its 11-blade, rounded diaphragm, the design promotes sharpness and a large, smooth bokeh when used wide open.
In addition to the f/1.8 maximum aperture, the lens also maintains an 11" minimum focusing distance across the entire zoom range. It achieves a maximum magnification ratio of 1:4.8 at its longest focal length, increasing depth of field and versatility in tight spaces.
Video Production
Designed with video creation in mind, the lens' bright f/1.8 aperture and wide-to-normal zoom range make it a versatile tool ideal for single-shooter, run-and-gun setups. An internal zoom design maintains the overall length during use, making it easy to balance on gimbals. The design also suppresses focus breathing for smooth movement across the focal range. Sigma's high-speed, high-response linear actuator autofocus remains both quiet and accurate, while manual focusing is improved with click-and-lock mechanisms.
The L-mount lens also supports switching between linear and non-linear focus ring settings. With a rotation angle of 120 to 720° and a constant minimum focusing distance, operators will benefit from intuitive manual focusing at any focal length.
Features
- Two AFL buttons
- Focus mode switch
- Water- and oil-repellent coating on front element
- Dust- and splash-resistant design
- Durable brass bayonet mount
- Compatible with the USB Dock UD-11
