Sigma 17‑40 mm f/1.8 DC | Art — Bright Wide‑to‑Normal Zoom for APS‑C Mirrorless
Sigma’s 17‑40 mm f/1.8 DC | Art is the world’s first constant‑f/1.8 zoom designed specifically for APS‑C mirrorless cameras. Delivering prime-like sharpness and low‑light capability across a 25.5–60 mm full-frame equivalent focal range, this lens offers outstanding performance in a compact, lightweight form.
Key Features
- Constant f/1.8 aperture across the entire 17–40 mm zoom range delivers shallow depth of field and consistent exposure.
- A sophisticated optical design with 17 elements in 11 groups—including four aspherical and four Special Low Dispersion elements—combined with Super Multi‑Layer Coating reduces flare, ghosting, and chromatic aberrations.
- An internal zoom mechanism maintains length and balance when zooming, minimizing zoom creep and suppressing focus breathing—ideal for handheld and video use.
- High-speed, whisper‑quiet autofocus powered by Sigma’s High‑Response Linear Actuator (HLA), with smooth manual focus via knurled focus ring, plus customizable AFL buttons and aperture ring.
- Minimum focus distance of around 28 cm (11 in), offering up to 1:4.8 magnification at 40 mm for creative close-up work.
- 11‑blade rounded diaphragm produces creamy, natural bokeh across the frame.
- Durable construction with water- and oil-repellent front element, dust and splash resistance, and brass bayonet mount.
- Compact profile measuring approximately 116 mm long with a diameter of 73 mm, weighing approximately 535 g—around 30 percent lighter than its predecessor.
- Accepts 67 mm filters, using conventional filter threads.
- Available for Sony E, Fujifilm X, Canon RF-S, and L‑Mount cameras.
Performance Snapshot
This lens excels in low-light and shallow-depth-of-field shooting. Performance rivals that of top-tier prime lenses, with sharp central resolution, vibrant contrast, and pleasing background separation. Though edge performance at maximum aperture shows slight softness and chromatic aberrations at wide angles, it remains exceptional across its zoom range.
Why Choose This Lens?
When you want the speed and sharpness of an f/1.8 prime combined with the flexibility of a zoom, the Sigma 17‑40 mm f/1.8 DC | Art stands out. It replaces multiple fast primes, reduces kit weight, and delivers professional optics in one solution. Ideal for stills and video creators who shoot portraits, events, street, and run-and-gun scenes.
With its large aperture, robust optics, and video-friendly controls, the Sigma 17‑40 mm f/1.8 DC | Art is a game-changing zoom lens for APS‑C mirrorless users who demand both speed and versatility.
