Here are the leaked specs. Are you getting this lens? This is the one lens that
I am going to order.
Sigma 17-40mm F1.8 DC | Art
Overview
A standard zoom lens with a large F1.8 aperture and exceptional image quality comparable to prime lenses across the entire zoom range.
Designed for APS-C mirrorless cameras, this lens pushes the boundaries of still and video photography expression.
The Sigma 17-40mm F1.8 DC | Art builds on the innovations of the Sigma 18-35mm F1.8 DC HSM | Art, which was the world’s first zoom lens with an F1.8 aperture.
Major Improvements
Wider zoom range: 17–40mm vs. 18–35mm
More than 30% lighter
Improved optical and physical design for better portability
Key Features
Prime-like Optical Power
Constant F1.8 aperture throughout the zoom range
Ideal for low-light conditions and soft background blur
Outstanding Optical Performance
High resolution even wide open at F1.8
Uses precision aspherical elements
Reduces chromatic aberration and sagittal coma flare
Flexible Framing
Zoom range: 17–40mm (equivalent to 25.5–60mm in full-frame). Covers wide-angle to portrait scenarios without changing lenses.
Reduced Flare & Ghosting
Multi-layer coating and advanced simulations reduce flare, delivering rich and high-contrast results.
Portability & Versatility
Internal Zoom
Lens length remains fixed during zoom and focus
Stable for handheld, tripod, and gimbal use
Lightweight Design
Over 30% lighter than the previous 18–35mm
Uses a smaller 67mm filter
Compact enough for daily use and travel
Dust & Splash Resistance
Front element coated to repel water and oil
Not waterproof – caution advised in wet environments
Controls & Video Support
Dual AFL Buttons
Two programmable AFL buttons, accessible in both horizontal and vertical shooting positions (depends on camera compatibility).
High-Speed Autofocus
Uses HLA (High-response Linear Actuator) for fast, quiet, and precise focusing – suitable for both photo and video.
Minimal Focus Breathing
Reduces angle-of-view shifts when focusing – enables smooth and natural focus pulls in video.
Aperture Ring with Configurable Functions
Manual aperture control ring with click ON/OFF
Lock switch prevents accidental changes
Canon RF version has a control ring instead, no aperture ring or click/lock switches
Technical Specifications
Lens Construction: 17 elements in 11 groups (4 SLD, 4 aspherical)
Angle of View: 79.7°–39.1°
Aperture Blades: 11 (rounded)
Minimum Aperture: F16
Minimum Focusing Distance: 28 cm
Maximum Magnification Ratio: 1:4.8 @ 40mm
Filter Size: 67mm
Dimensions: φ72.9mm × 115.9mm
Weight: 535g
Supplied Accessories
It will be interesting to see how it stacks up against the MkII 16-55 from Fuji. Obviously its faster with trade-offs of weight and reach. Great to see Sigma making some of their higher quality lenses for APSC. I am anxious for more details on the 12/1.4. If its a reasonable size, I'll likely order immediately.
No. Many years back I owned the 18-35 f1.8 for Canon. Nightmare regarding AF (needed to be calibrated). For Fuji, that lens is simply too big and heavy, and the focal range is too small. When I want or need fast, I use my primes.
@deadwolfbones thx for sample images - these are rally nice to watch!
Can You tell me, if this Sigma 17-40/1.8 has writings engraved, or if they are just simply printed on lens barrel?
Nielk Mike wrote:
For Fuji, that lens is simply too big and heavy, and the focal range is too small. When I want or need fast, I use my primes.
I have same thoughts
Sigma 17-40/1.8 may look impressive on paper, but in reality this lens will give more-less same results, as full frame 25.5-60/2.8 zoom lens.. so neither true UWA or short tele.
Recently released Panasonic 24-60/2.8 is almost the same size and weight (granted, it's not internal zooming), but Sony 24-50/2.8 G is even smaller and lighter than Sigma 17-40/1.8, with more useful focal range at wide end (You can easily crop from 50mm to 60mm)
Sigma 17-40/1.8 size and weight is substantial for aps-c standards.
I mean.. what is the point of using smaller sensor aps-c camera and pair it with lens of this size and weigh, where You can You buy FF camera and one of those zoom lenses: Panasonic 24-60/2.8 or Sony 24-50/2.8 and enjoy all benefits of FF sensor?
I think I would have more use from this lens combo for lightweight travel photography: Fuji 16-50/2.8-4.8 mkII + Fuji 35/1.4
The lens is also expected to be available in L-mount. Is there any plan for an APS-C camera with an L-mount? At present, no such cameras are being produced.
BeatX wrote:
@deadwolfbones@ thx for sample images - these are rally nice to watch!
Can You tell me, if this Sigma 17-40/1.8 has writings engraved, or if they are just simply printed on lens barrel?
BeatX wrote:
I mean.. what is the point of using smaller sensor aps-c camera and pair it with lens of this size and weigh, where You can You buy FF camera and one of those zoom lenses: Panasonic 24-60/2.8 or Sony 24-50/2.8 and enjoy all benefits of FF sensor?
Maybe you only want one camera? Using your type of logic, you could also say why bother with FF and a compact lens when you could just buy an APSC and enjoy all the benefits of the smaller platform?
I'm happy Sigma is taking the APCS market seriously and offering their lens designs. Now bring us that delayed 12mm!
Plzenaak wrote:
The lens is also expected to be available in L-mount. Is there any plan for an APS-C camera with an L-mount? At present, no such cameras are being produced.
I thought all Sony APSC mirrorless bodies are L-mount. Edit: i meant to say E-mount, sorry for any confusion
Managed to play with this lens briefly this week at Bild and compare it to my brand new 16-55 II. I was definitely impressed. It didn’t feel much heavier, but the length difference was more noticeable to me. Feels great, really sharp, 1.8 looks awesome. 16 vs 17 is a little noticeable, and 40 vs 55 is really noticeable. 2.8 vs 1.8 is easy to spot, but it’s not a massive visual difference. I don’t mean it doesn’t matter, but they both have a decent amount of bokeh, and 55 helps level out the long end background blur difference.
I’m extremely happy with the 16-55, I don’t feel like I made a mistake. I especially love the long end. But, the sigma is compelling, especially for video or if you don’t have any primes. What amazing choices were have!
And yes that Sony 24-50 looks amazing too, if you’re starting from scratch certainly consider that. If you want this kind of look from a zoom, it’s seems like it’s gonna be a bigger lens on any format. But as a system, as an experience, I think many of us prefer Fuji obviously, and it’s rad to have this option now without having to switch to another brand.
That's a pity..
I mean, at the end it doesn't rally matter but I would expect engraved markings and writings from a premium lens, instead of simple paintings like from early Viltrox lenses.
Such engraved writings gives me much more premium feel and impression when when I'm looking at the lens.
