Sigma 17mm f/4 DG Contemporary Lens (L-Mount)

Sigma 17mm f/4 DG DN Contemporary Lens for L-Mount – Ultra-Wide Prime for Full-Frame Mirrorless Systems

The Sigma 17mm f/4 DG DN Contemporary Lens (L-Mount) redefines ultra-wide-angle performance in a compact, travel-ready package, engineered specifically for full-frame mirrorless cameras. Perfect for landscape explorers, architectural photographers, urban storytellers, and travel vloggers alike, this lens balances professional-grade optical quality with exceptional portability. Weighing just 225 grams and measuring only 48.8mm in length, it easily slips into any camera bag or even your jacket pocket—yet packs the power of a truly expansive 103.7° angle of view that brings every sweeping vista or tightly confined interior to life with stunning depth and detail. Built as part of Sigma’s esteemed I Series, the lens features an elegant all-metal construction with precision-milled aluminum components, giving it a premium tactile feel while ensuring long-term durability in rugged shooting environments.

Under the hood, the Sigma 17mm f/4 DG DN is meticulously crafted with 9 optical elements arranged in 8 groups, including two Special Low Dispersion (SLD) elements and three high-precision aspherical elements. This sophisticated design minimizes chromatic aberration, distortion, and edge softness—delivering sharp, high-contrast images even at the edges of the frame. Whether you're capturing sunlit exteriors or dimly lit interiors, Sigma’s Super Multi-Layer Coating ensures minimal ghosting and flare, preserving color fidelity and contrast across varying light conditions. The result? Every shot pops with clarity and realism. The constant f/4 maximum aperture provides consistent exposure control and is ideal for balancing depth of field with sharpness, particularly when photographing wide scenes with multiple planes of focus.

Functionality meets finesse with Sigma’s integration of a stepping motor-based autofocus system, which guarantees fast, silent, and precise focusing—perfect not only for still photography but also for smooth, noise-free video recording. Add in its close focusing distance of just 12 cm and a maximum magnification ratio of 1:3.6, and you have the flexibility to create dramatic, wide-angle close-ups that exaggerate perspective and immerse your viewer in the scene. The rounded 7-blade diaphragm further enhances subject isolation with pleasing background bokeh, rare for an ultra-wide lens at this aperture level. Designed for creatives who demand control, the lens features a manual aperture ring with tactile click-stops and a dedicated AF/MF switch, allowing quick transitions between shooting modes without diving into your camera’s menu system.

From a practical standpoint, the Sigma 17mm f/4 DG DN Contemporary Lens (L-Mount) comes with a standard 55mm filter thread, enabling compatibility with a wide range of neutral density, polarizing, and creative filters—a rare feature for ultra-wide lenses that often lack front filter support. Included in the box is a custom-designed petal-type lens hood, a rear lens cap, and Sigma’s signature magnetic metal front cap, which snaps on with satisfying precision and convenience. Weather resistance is also a hallmark of this lens, with a dust- and splash-resistant mount gasket that gives peace of mind when shooting in unpredictable outdoor conditions.

What truly sets this lens apart in a crowded market is the unique combination of optical excellence, build quality, portability, and affordability. It achieves the kind of sharpness and correction that would normally be expected from larger, pricier lenses—without the bulk. Whether you’re shooting professional work or capturing everyday moments with cinematic flair, this lens delivers with both precision and personality. Sigma’s commitment to craftsmanship, evidenced in the fine mechanical finishes and tight tolerances of the I Series, ensures you’re not just purchasing a lens, but investing in a creative tool that will enhance your photography for years to come.

Choose the Sigma 17mm f/4 DG DN Contemporary Lens (L-Mount) if you seek a lightweight, high-performance ultra-wide solution with a premium finish, impressive close-up capability, and modern autofocus performance—all in a form factor that encourages you to bring it everywhere. From vast landscapes to intimate street scenes, this lens offers unmatched versatility and aesthetic control, empowering photographers and filmmakers to push creative boundaries without compromise.

Features:

Ultra-Wide 17mm Focal Length with 103.7° Field of View

The Sigma 17mm f/4 DG DN Contemporary Lens offers an exceptionally wide 103.7° angle of view, making it ideal for full-frame mirrorless photography where expansive framing is required. Whether you're capturing sweeping landscapes, dramatic architectural structures, or shooting indoors in confined spaces, this ultra-wide focal length allows you to frame more without needing to step back. Its 17mm reach provides a dynamic perspective, exaggerating foreground subjects and emphasizing depth—perfect for creating immersive visuals with a sense of scale.

All-Metal Premium Construction from Sigma’s I Series

Part of Sigma’s prestigious I Series lineup, this lens is crafted with a full-metal barrel including aluminum internal and external parts, delivering both tactile quality and long-term durability. The precision-cut finish not only enhances the aesthetic but ensures tighter mechanical tolerances for professional reliability. From the click-stopped aperture ring to the engraved markings and sturdy manual focus ring, the build quality reflects Sigma’s commitment to high-end engineering for discerning photographers.

Compact, Lightweight Design for Everyday Portability

Weighing only 225 grams and measuring 48.8mm in length, this lens is tailored for photographers who value performance without the bulk. Its ultra-compact form factor allows for easy transport and minimal intrusion when shooting on the street, traveling, or working in fast-paced environments. You can comfortably carry it all day or pack it alongside multiple lenses without compromising space or weight, making it a go-to choice for creators on the move.

High-Precision Optical Design with Aspherical and SLD Elements

Engineered with 9 elements in 8 groups—including two SLD (Special Low Dispersion) elements and three high-quality aspherical elements—the lens achieves high-resolution results across the frame. This advanced optical construction minimizes chromatic aberration, sagittal coma flare, and distortion, ensuring crisp image quality from center to corners. It's designed for photographers who demand edge-to-edge sharpness, accurate color rendition, and minimal post-processing corrections.

Super Multi-Layer Coating for Flare and Ghosting Reduction

The optical surfaces are treated with Sigma’s proprietary Super Multi-Layer Coating, which effectively suppresses lens flare and ghosting. This allows for better contrast and color accuracy, especially when shooting against intense light sources or in backlit scenarios. Whether capturing a sunrise landscape or working with artificial light indoors, this coating helps preserve image clarity and contrast under difficult lighting conditions.

Close Focusing Distance of Just 12 cm

The Sigma 17mm f/4 DG DN has a minimum focusing distance of only 12 cm (4.7 inches), which is remarkably short for an ultra-wide lens. This feature allows for highly creative compositions, enabling photographers to get extremely close to their subjects while maintaining a wide background. It’s perfect for emphasizing small foreground elements, adding dramatic depth, and creating exaggerated perspective effects that are visually compelling and uncommon with standard wide-angle lenses.

Stepping Motor Autofocus with Smooth, Silent Operation

Powered by a high-precision stepping motor, the autofocus system is optimized for both stills and video shooting. The focus is fast, silent, and accurate—making it ideal for situations that require minimal noise, such as interviews, weddings, or street shooting. The smooth transition and minimal focus breathing are also beneficial for videographers looking to maintain visual consistency during focus pulls.

Minimized Focus Breathing for Video Work

Focus breathing—an optical issue where the image size changes slightly during focusing—is significantly minimized in this lens, ensuring consistent composition when adjusting focus. This is particularly valuable for filmmakers and content creators who need clean, professional-grade footage without noticeable frame shifting during refocusing.

Manual Aperture Ring with Click Stops and AF/MF Switch

The manual aperture ring includes click-stops for tactile control over f-stop changes, allowing intuitive adjustments without relying on the camera’s menu. Additionally, the dedicated AF/MF switch gives quick access to manual or auto focus modes on the fly. These features cater to photographers who value hands-on shooting control and need to react quickly in dynamic environments.

Dust and Splash-Resistant Mount with Rear Gasket

The lens mount is fitted with a rubber gasket to prevent the ingress of dust and light moisture, making it more resilient in adverse shooting environments. While not fully weather-sealed, this design provides added protection when working outdoors in unpredictable weather conditions—offering peace of mind for adventure, travel, and nature photographers.

Magnetic Metal Front Cap and Standard 55mm Filter Thread

Sigma includes a magnetic metal front cap that clicks into place securely and effortlessly, combining convenience with class. Additionally, the lens supports standard 55mm screw-in filters, making it easy to use ND, CPL, or specialty filters without the need for adapters—something not typically possible with ultra-wide lenses due to bulbous front elements.

Compatibility with Sigma UD-11 USB Dock for L-Mount

For users of L-Mount cameras, the lens is compatible with the Sigma UD-11 USB Dock, allowing firmware updates and AF customization. This extends the longevity and flexibility of the lens, letting professionals tweak performance settings and ensure optimal compatibility with future camera releases.

• Landscape Photography – Capture sweeping natural vistas and wide scenic compositions with sharp edge-to-edge clarity and rich color detail.
• Architecture & Interior Photography – Perfect for tight indoor spaces or exterior shots of buildings, offering distortion control and a broad field of view.
• Street Photography – Discreet and lightweight, ideal for spontaneous city shots, environmental portraits, or capturing urban geometry and scenes.
• Travel Photography – Ultra-compact and portable, fits easily in a small kit for documenting your travels with immersive wide-angle perspectives.
• Environmental Portraits – Pairing wide field of view with close focusing (12cm), it enables storytelling portraits where the background context matters.
• Vlogging and YouTube Content Creation – Smooth, quiet autofocus and minimized focus breathing make it an excellent choice for handheld and walk-and-talk video content.
• Real Estate Photography – Accurately depict room proportions and spatial layout in confined areas, helping showcase interiors for listings and brochures.
• Creative Wide-Angle Close-Ups – Extreme close focusing allows for exaggerated perspectives with foreground emphasis and unique visual effects.
• Time-Lapse and Astro Photography – The wide field of view is excellent for star fields, nightscapes, and time-lapse sequences with large sky coverage.
• Documentary and Run-and-Gun Filmmaking – Lightweight design and professional optics make it well-suited for handheld or gimbal-mounted filming in dynamic settings.

Pros:

• Ultra-wide 17mm focal length ideal for landscapes, interiors, and architecture
• Extremely compact and lightweight design at just 225g
• All-metal premium I Series construction ensures durability and professional feel
• Fast, quiet autofocus with stepping motor for stills and video
• Close focusing distance of 12 cm allows dramatic wide-angle close-ups
• Excellent edge-to-edge sharpness with advanced optical elements
• Super Multi-Layer Coating minimizes flare and ghosting
• Manual aperture ring with click stops for intuitive control
• Dust- and splash-resistant mount for added environmental protection
• Standard 55mm filter thread supports easy filter use

Cons:

• Maximum aperture of f/4 may limit low-light performance
• Not fully weather-sealed, only the mount is gasketed
• No built-in optical stabilization
• Aperture ring may not be useful for photographers who prefer camera-based controls
• No distance scale or depth of field markings for manual focus users

• Focal Length: 17mm
• Maximum Aperture: f/4
• Minimum Aperture: f/22
• Lens Mount: L-Mount (Leica)
• Format Compatibility: Full-Frame
• Angle of View: 103.7°
• Lens Construction: 9 elements in 8 groups
• Special Elements: 2 SLD elements, 3 aspherical elements
• Minimum Focusing Distance: 12 cm (4.7 inches)
• Maximum Magnification Ratio: 1:3.6
• Autofocus Type: Stepping Motor (STM)
• Focus Type: Autofocus with Manual Focus Override
• Diaphragm Blades: 7, rounded
• Filter Size: 55mm
• Dimensions (Diameter × Length): 64mm × 48.8mm (2.5 in × 1.9 in)
• Weight: 225g (7.9 oz)
• Coating: Super Multi-Layer Coating
• Aperture Ring: Yes, with click stops
• AF/MF Switch: Yes
• Mount Gasket: Yes, dust- and splash-resistant
• Front Cap: Magnetic metal cap (LCF55-01M)
• Rear Cap: LCR II
• Lens Hood: Petal-type, model LH576-03
• USB Dock Compatibility: Sigma UD-11 USB Dock for L-Mount
• Product Series: Sigma I Series (Contemporary)
• Product Code: 415969
• UPC: 085126415696

• Sigma 17mm f/4 DG DN Contemporary Lens (L-Mount)
• Magnetic Metal Front Lens Cap (LCF55-01M)
• Rear Lens Cap (LCR II)
• Petal-Type Lens Hood (LH576-03)
• User Manual
• Warranty Information

Is the Sigma 17mm f/4 DG DN Contemporary Lens compatible with APS-C cameras?

Yes, it is compatible with APS-C mirrorless cameras using the L-Mount. However, the effective focal length becomes approximately 25.5mm due to the crop factor.

Does this lens support autofocus during video recording?

Yes, the lens features a stepping motor for fast and silent autofocus, making it highly suitable for smooth and quiet video capture.

Can I use standard filters with this lens?

Yes, the lens has a 55mm front filter thread, allowing the use of standard screw-in filters such as ND, UV, and CPL filters.

How close can I focus with the Sigma 17mm f/4 DG DN lens?

The lens has a minimum focusing distance of just 12 cm (4.7 inches), enabling dramatic wide-angle close-up shots with impressive detail and perspective.

Is the Sigma 17mm f/4 DG DN lens weather-sealed?

The lens includes a dust- and splash-resistant mount with a rubber gasket, providing basic protection against moisture and dust, although it is not fully weather-sealed.

Does the lens come with a lens hood and caps?

Yes, the package includes a dedicated petal-type lens hood, a magnetic metal front cap, and a rear cap.

Is focus breathing an issue with this lens for video use?

No, the lens is specifically designed to minimize focus breathing, offering more stable framing during focus pulls in video applications.

Can the lens aperture be adjusted manually?

Yes, it features a knurled manual aperture ring with tactile click-stops, giving photographers direct control over f-stop settings.

What materials are used in the construction of this lens?

The lens is built with an all-metal body, including precision-machined aluminum parts, providing premium durability and a high-end feel.

Is the lens firmware upgradable?

Yes, for L-Mount users, the lens is compatible with the Sigma UD-11 USB Dock, allowing firmware updates and customization of settings.