Name: Sigma 17-40mm f/1.8 DC Art Lens for Canon RF-mount
SKU: 214972
Availability: InStock

A Bright, Wide-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 range, the 17-40mm f/1.8 DC Art Lens. Featuring prime-like optical performance and video-friendly design and functionality, its 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 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 a knurled control ring.

Two AFL buttons
Focus mode switch
Water- and oil-repellent coating on front element
Dust- and splash-resistant design
Durable brass bayonet mount

Specification

Color	Black
Focal Length	17 to 40mm (35mm Equivalent: 25.5 to 60mm)
Aperture	Maximum: f/1.8 Minimum: f/16
Lens Mount	Canon RF-Mount
Lens Format Coverage	APS-C
Angle of View	76.5° to 37.1°
Minimum Focus Distance	11″ / 28 cm
Magnification	1:4.8 Macro Reproduction Ratio 0.21x Magnification
Optical Design	17 Elements in 11 Groups
Aperture/Iris Blades	11, Rounded
Focus Type	Autofocus
Image Stabilization	No
Filter Size	67 mm (Front)
Dimensions	ø: 2.9 x L: 4.6″ / ø: 72.9 x L: 115.9 mm
Weight	19.8 oz / 560 g