Sigma AF 17mm F4 DG I C lens for L-Mount, Silver 

The premium build, outstanding image quality and portable body of the 17mm F4 makes it the perfect portable landscape prime.

It’s also ideal for interior, wedding and architectural photography, and in particular for photographers who like to work light, or carry their kit over long distances.

• Internal Focus
• Full-Frame
• AF MF Switch
• 7 Rounded Blades
• Water and Oil Repellent
• Super Multi-Layer Coating
• Magnetic Lens Cap
• Brass Mount

Part of the I series range of lenses in the Contemporary line-up, this ultra-wide-angle prime for mirrorless cameras is one the of the most compact full-frame wide-angle lenses on the market.

Despite this it has a retro-style all-metal construction, including an all-metal petal-type hood, a manual aperture ring and a metal focus ring, giving it a premium and stylish feel.

Image quality is absolutely exceptional across the whole frame, and there is a 55mm thread around the front element for attaching filters.

Compact but Stylish

Although the 17mm F4 has a premium all-metal build constructed with precision-cut aluminium parts, it only weights 225g, making it perfect for outdoor and travel photographers who prefer a compact but robust lens that can easily be carried around all day. A dust- and splash-proof mount is fitted to help stop contamination from dust and water.

The tactile knurled metal lens hood, focus ring and aperture ring improve the grip on the lens for greater control. Included with the lens is a magnetic metal lens cap, which further improves ease of use.

• Metal mount with seal: Protects against dust and moisture.
• All-metal aperture ring: Delivers a smooth but precise action. Includes an Auto setting for in-camera control.
• Metal focus ring: Smooth action with AF/MF switch.
• Ultra-compact body: All metal build that weighs only 225g, ideal for landscapes and travel.
• Petal-shaped hood: All metal with individually machine knurled grooves.

High-Performance Optics

Despite its size, the 17mm F4 does not compromise on optical quality. Its advanced optical design includes 9 elements in 8 groups, of which 3 are aspherical elements and 2 are SLD elements. These help to keep the lens compact while greatly reducing the appearance of chromatic aberration around areas of high contrast. Vignetting is very minimal even wide-open, which is important on ultra-wide-angle lenses.

Well-Controlled Flare and Ghosting

Owing to its advanced Super Multi-Layer lens coatings, the 17mm F4 displays very minimal flare, which makes it ideal for shooting into bright light sources, such as a low sun.

Close Focus Ability

Unusual for an ultra-wide-angle lens, the SIGMA 17mm has a minimum focusing distance of just 12cm, with a minimum working distance (from the subject to the front of the lens) of just over 7cm. This 1:3.6 magnification ratio allows photographers to shoot detailed close-ups without needing a dedicated macro lens.

Magnetic Lens Cap Holder

Available as a separate accessory, Sigma’s innovative magnetic lens cap holder can be clipped to clothing or a bag to securely hold any I series magnetic lens cap. This helps keep the cap safe while the camera is in use.

Made in Japan

All Sigma cameras and lenses are designed, manufactured and assembled at Sigma’s sole factory at Aizu in Japan. This domestic production model is unusual in today’s industry, with most imaging companies opting to outsource to other countries to reduce costs. But SIGMA believes that keeping virtually all manufacturing, processing and assembly in Aizu is essential for creating innovative, carefully thought-out and impeccably constructed products that meet the high standards demanded by professional photographers and film-makers around the world.