The Sigma 17–40mm F1.8 DC DN is a groundbreaking ultra-fast zoom lens designed for APS-C mirrorless cameras. Featuring a constant F1.8 aperture throughout the zoom range, it delivers prime-like brightness with the flexibility of a zoom—ideal for low-light shooting, subject isolation, and creative depth-of-field control.
Covering a highly practical wide-to-standard focal range, this lens is well suited for landscapes, street photography, environmental portraits, events, and video production. Advanced optical design ensures excellent sharpness, high contrast, and controlled aberrations even when shooting wide open. The bright aperture also enables smooth, pleasing bokeh rarely seen in APS-C zoom lenses.
Optimized for mirrorless systems, the lens offers fast and quiet autofocus, making it reliable for both photography and video. Despite its exceptional optical performance, the lens is engineered with portability in mind, making it a powerful everyday tool for creators who want speed without sacrificing versatility.
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