Sigma 17-40mmF1.8 Press Text Leaked
SonyAlphaRumors leaked is the press text for the new Sigma 17-40mm f/1.8 APS-C E-mount lens that will be announced on June 17.
Remember, according to our information, the Sigma 12mmF1.4 launch, which also already leaked, has been postponed. So all we get on June 17 is the Sigma 17-40mmF2.8 DC ART.
You can read the full press text below.
- Sigma 17-40mm f/1.8 DC ART
BHphoto / Amazon / Adorama / Moment - Sigma 12mm f/1.4 DC
BHphoto / Amazon / Adorama / Moment
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
- Lens Hood LH728-02
- Front Lens Cap
- Rear Lens Cap
Optional Accessories
- USB Dock UD-11 (L-Mount)
- Ceramic WR Protection Filter (67mm)
- WR Protection Filter (67mm)
- UV WR Filter (67mm)
- Circular PL WR Filter (67mm)
| Lens Mount: | SONY E-mount |
| Series: | ART |
| Sensor Compatibility: | APS-C / Crop |
| Maximum Aperture: | F1.8 |
| Weather Sealing: | Not included |
| Lens Construction: | 17 elements in 11 groups |
| Number of Aperture Blades: | 11 |
| Dimensions (Diameter × Length): | φ72.9mm × 117.9mm |
| Filter Diameter: | 67mm |
| Minimum Focusing Distance: | 28 cm |
| Minimum Aperture: | F16 |
| Focus Mode: | Manual / Autofocus |
| Field of View: | 79.7°–39.1° |
| Maximum Magnification Ratio: | 1:4.8 |
| Weight: | 525g |
| Included Accessories: | Front and rear lens caps, lens hood |