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A BrightWide-to-Normal APS-C Zoom
Sigma introduces a new zoom lens for APS-C mirrorless cameras with an f/1.8 aperture throughout the entire zoom rangethe 17-40mm f/1.8 DC Art Lens. Featuring prime-like optical performance and video-friendly design and functionalityits wide-to-normal focal range means a lighter kit bag without surrendering image quality.
Design and Performance
The lens features a total of 17 elements in 11 groupswith 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 lensesincluding the 18-35mm f/1.8 DC HSM Art lens. Along with its 11-bladerounded diaphragmthe design promotes sharpness and a largesmooth bokeh when used wide open.In addition to the f/1.8 maximum aperturethe 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 lengthincreasing depth of field and versatility in tight spaces.
Video Production
Designed with video creation in mindthe lens' bright f/1.8 aperture and wide-to-normal zoom range make it a versatile tool ideal for single-shooterrun-and-gun setups. An internal zoom design maintains the overall length during usemaking it easy to balance on gimbals. The design also suppresses focus breathing for smooth movement across the focal range. Sigma's high-speedhigh-response linear actuator autofocus remains both quiet and accuratewhile manual focusing is improved with click-and-lock mechanisms.
