SIGMA Art 17-40mm F1.8 DC APS-C Mirrorless Lens 17-40mm Constant Large Aperture Standard Zoom Lens Live Streaming Tool (Canon RF Mount)

Includes 4 SLD (Special Low Dispersion) elements

Includes 4 Aspherical elements

Lens Hood LH728-02

Front Cap LCF-67IV

Rear Cap LCRIII

Lens Pouch

Constant F1.8 large aperture across entire zoom range enables excellent low-light performance and shallow depth of field effects.

Optical design delivers high resolution comparable to prime lenses, with advanced correction of axial chromatic aberration and sagittal coma aberration.

Incorporates 4 SLD and 4 aspherical elements for superior image quality and sharpness even at maximum aperture.

Advanced SIGMA Super Multi-Layer Coating significantly reduces flare and ghosting for high contrast and detailed images.

Internal zoom mechanism maintains lens length during zooming, enhancing stability and ease of use on handheld, tripod, or gimbal setups.

Dust and splash-proof construction with water and oil repellent coating on the front element for reliable outdoor use.

Reduced focus breathing effect for smooth and natural focus transitions, ideal for video recording.

Equipped with a multifunction aperture ring allowing intuitive aperture control; click switch enables silent stepless aperture adjustment for video.

Aperture ring lock switch prevents accidental aperture changes during shooting.

Canon RF mount version uses a control ring instead of an aperture ring and does not have click switch or aperture ring lock.

Dust and splash-proof design does not guarantee full waterproofing.