Sigma 10-18mm F/2.8 DC DN Contemporary Lens (Canon RF)

The Sigma 10‑18mm F2.8 DC DN Contemporary is an ultra‑wide‑angle zoom lens with a constant maximum aperture of f/2.8 throughout the zoom range. It is built for APS‑C‑format mirrorless cameras in Canon RF mount and is part of Sigma’s Contemporary line, which focuses on a balance of high optical performance, compact size, and lighter weight.

Key Specifications and Features

• Focal Length: 10–18 mm (ultra‑wide zoom for APS‑C format). On Canon APS‑C bodies this gives about a 16–29 mm equivalent field of view compared with full‑frame.
• Maximum Aperture: Constant f/2.8 across the zoom range, enabling good low‑light performance and creative control over depth of field.
• Minimum Aperture: f/22.
• Optical Construction: 13 elements in 10 groups including three FLD elements, one SLD element, and four aspherical elements designed to deliver sharp, well‑corrected images despite the wide field of view.
• Angle of View (Canon RF): Approximately 106.6° to 73.4°.
• Diaphragm: 7 rounded blades for smoother out‑of‑focus areas.
• Autofocus: Yes; uses a stepping motor (STM) for fast, smooth, relatively quiet autofocus suitable for stills and video.
• Image Stabilization: The lens does not have built‑in optical image stabilization; stabilization must come from the camera body if it has IBIS.
• Minimum Focusing Distance: About 11.6 cm (at wide end), enabling close shooting for creative wide‑angle compositions.
• Maximum Magnification: Around 1:4 at the wide end.
• Filter Size: 67 mm thread for screw‑on filters.
• Size and Weight: Approximately 72.2 mm diameter × 62.0 mm length and weighs about 270 g, making it compact and lightweight for travel and handheld use.
• Lens Hood and Accessories: Supplied with a push‑on petal‑type hood designed to match the lens’s compact form, plus front and rear caps.
• Mount Build: The lens mount includes dust‑ and splash‑resistant sealing to help protect against light weather conditions.

Optical Performance and Use
The lens’s optical design with special low‑dispersion glass and aspherical elements helps correct aberrations and deliver sharp image quality across the frame. Its wide field of view is very effective for landscapes, architecture, interior spaces, and creative wide‑angle shots. The constant f/2.8 aperture also aids in shooting in lower light and offers more control over depth of field than typical kit zooms.

Video‑Friendly Features
Because of its stepping autofocus motor and design to reduce focus breathing (change in angle of view when focusing), this lens is suitable for video as well as still photography.

Practical Considerations

• The lack of optical stabilization means relying on camera body IBIS (if available).
• Its compact size and light weight make it especially convenient for travel, vlogging, and handheld shooting.

Typical Applications

• Wide‑angle landscapes
• Architectural photography
• Interiors and real‑estate
• Handheld video and vlogging
• Creative close‑focus wide shots