Description
Introducing the Sigma 17-40mm f/1.8 DC Art (Canon RF)
The Sigma 17-40mm f/1.8 DC Art (Canon RF) is a bright, wide-angle, standard zoom lens designed for APS-C mirrorless cameras. It offers near-prime-like optical quality, with a constant f/1.8 throughout the zoom range, ensuring exceptional low-light performance and smooth, aesthetically pleasing bokeh.
General and essential features
The Sigma 17-40mm f/1.8 DC Art lens features 17 elements in 11 groups, including 4 aspherical elements and 4 Special Low Dispersion (SLD) elements, effectively minimizing lens flare, ghosting, and chromatic aberrations. The 11-blade rounded enhances bokeh.
With a minimum focusing distance of 28 cm (11) across the entire zoom range, it offers a macro reproduction ratio of 1:4.8 (0.21×) at 40 mm, ideal for creative -ups. Thanks to its internal zoom design, the body length remains constant, facilitating gimbal balancing and enabling focus breathing-free zooming, a major advantage for video production.
The autofocus utilizes a fast and quiet linear motor , and the manual focus design incorporates click-and-lock rings with a rotation range of 120° to 720° , allowing for a smooth transition between linear and non-linear focus. Two AFL (AutoFocus Lock) buttons and a focus mode switch offer comfort and efficiency. Finally, with a water- and oil-repellent coating on the front element, a dust- and splash-resistant design , and a robust brass mount, this zoom lens is built to last in professional conditions. It is compatible with Sigma’s UD-11 USB Dock for firmware updates and adjustments.
Case studies
Low-light event coverage: With its f/1.8 aperture and 17-40mm range , the Sigma captures fast-paced indoor scenes while maintaining a silky background blur, perfect for isolating subjects.
Run-and-gun shooting: The internal zoom avoids length variations, ideal on gimbal or stabilizer: no more untimely repositioning and a smooth workflow.
Interview videos: AFL buttons allow you to lock focus on the main subject, while suppressed focus breathing ensures a professional, cinematic look.
Frequently Asked Questions
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What is the focal length range of the Sigma 17-40mm f/1.8 DC Art?
The zoom covers from 17mm to 40mm, which is equivalent to 25.560mm in 35mm (full frame).
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Is the opening constant?
Yes, the maximum aperture remains at f/1.8 across the entire focal range, perfect for low-light performance and quality bokeh.
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Can you do macro photography with this zoom lens?
Thanks to a reproduction ratio of 1:4.8 (0.21×), you can achieve sharp -ups with a shallow depth of field.
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Is it suitable for video?
Absolutely: internal zoom design, focus breathing suppression, linear autofocus, click-and-lock rings and AFL buttons make it a zoom lens very well suited for video.
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Is the Sigma weatherproof?
Yes, with its water- and oil-repellent lenses, a dust- and splash-resistant case and a durable brass frame, it meets the requirements for outdoor use.
Highlights of the Sigma 17-40mm f/1.8 DC Art (Canon RF)
- Constant f/1.8 aperture : excellent low-light performance
- Advanced optical construction : 17 elements, 4 aspherical, 4 SLD
- Focus breathing is eliminated : ideal for video
- Durable design : waterproof, hydro-oleophobic treatment, brass frame
- Smooth and professional control : linear autofocus, click-and-lock rings, AFL buttons
