SIGMA 17-40mm f/1.8 DC Art L Mount Bundle camera lens

Wide-aperture APS-C zoom

The Sigma 17-40mm f/1.8 DC Art lens covers a 17-40mm focal range at a constant f/1.8 aperture on L-mount APS-C mirrorless bodies. Its 17 elements in 11 groups deliver prime-level sharpness across the zoom range for photographers and video creators who need wide to standard perspectives with shallow depth of field. The bundle adds a 67mm filter kit and UV filter for immediate protection and creative control.

Inner zoom with HLA focus

An inner zoom mechanism keeps the lens length constant, simplifying gimbal balancing and matte-box clearance for video work. The High-response Linear Actuator drives fast, quiet autofocus with minimal focus breathing, so focus pulls stay smooth during recording. A 67mm front thread accepts the included filters without vignetting, freeing up budget for additional accessories.

Lightweight constant-aperture design

The optical formula reduces weight by over 30 percent compared with the earlier 18-35mm f/1.8 design, easing handheld fatigue during long sessions. Constant f/1.8 exposure across the zoom range removes the need to adjust lighting or ISO when reframing, keeping noise performance consistent. Buyers who need full-frame coverage or longer telephoto reach should look elsewhere.