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Sigma 10- vs Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle

Updated July 2026 — Sigma 10- wins on zoom range and weight, Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle wins on size and build.

The Sigma lens offers superior versatility and image quality, while the Canon lens is more budget-friendly and compact.

Why Sigma 10- is better

Wider Range

Sigma offers a zoom range of 10-18mm.

Image Quality

Sigma is engineered for expressive imaging.

Versatility

Sigma is ideal for landscapes and video.

Why Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle is better

Price

Canon is significantly cheaper at $299.

Compactness

Canon is a lightweight pancake lens.

Compatibility

Canon works with full-frame and APS-C cameras.

Overall score

Sigma 10-
85
Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle
75

Specifications

SpecSigma 10-Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle
Aperturef/2.8f/2.8
Focal Length10-18mm28mm
Mount TypeE MountRF Mount
Min Focus11 in.9 in.
Max Mag0.17x0.17x

Dimension comparison

Sigma 10-Canon RF28mm F2.8 STM Lens, RF Mount, Wide-Angle

Overview of the Products

The Sigma 10-18mm F2.8 DC DN and the Canon RF28mm F2.8 STM Lens are both excellent choices for photographers and videographers, but they cater to different needs and camera systems. The Sigma lens is designed for Sony E mount cameras, while the Canon lens is made for RF mount, specifically targeting full-frame cameras. Priced at $679.00, the Sigma lens is more premium compared to the Canon lens, which retails for $299.00, making it about 56% cheaper than its competitor.

Design and Build Quality

The Sigma 10-18mm F2.8 DC DN is noted for being the world's smallest and lightest ultra-wide-angle zoom lens for APS-C cameras. Its compact design enhances portability, making it ideal for landscapes, travel, and video content creation. In contrast, the Canon RF28mm F2.8 STM Lens is described as a supremely lightweight pancake lens that is incredibly compact and easy to carry. Both lenses emphasize portability, but the Sigma offers a wider zoom range, which can be crucial for capturing expansive scenes.

Image Quality

When it comes to image quality, the Sigma 10-18mm lens is engineered for expressive imaging capabilities, making it ideal for dynamic landscapes and video work. The Canon RF28mm lens, on the other hand, boasts excellent image quality with features like three aspheric elements and Canon Super Spectra Coating, which minimizes ghosting and flare. While both lenses promise high-quality images, the Sigma lens's large aperture and ultra-wide-angle capabilities offer unique advantages for those looking to capture broad scenes with depth.

Focusing Capabilities

The Canon RF28mm F2.8 STM Lens is particularly noted for its Canon leadscrew type STM focus drive, which is designed for smooth and quiet autofocus operation—especially important for video recordings. The Sigma lens does not explicitly mention its autofocus technology, but its design is aimed at creating expressive images on the go. In this comparison, the Canon's advanced focus mechanism may appeal more to videographers and those needing precise focus in dynamic settings.

Versatility and Use Cases

The Sigma 10-18mm F2.8 DC DN is versatile for various types of photography, especially when it comes to landscapes and travel, due to its ultra-wide-angle zoom. It allows users to creatively capture expansive scenes and dynamic shots. Conversely, the Canon RF28mm F2.8 STM Lens is a great entry point for full-frame EOS R cameras and is well-suited for street photography and everyday use. While both lenses serve different niches, their versatility makes them valuable tools for photographers looking to expand their creative capabilities.

Price and Value Proposition

The Sigma lens is priced at $679.00, while the Canon lens offers a more budget-friendly option at $299.00. This pricing difference of approximately $380 means that the Canon lens is about 56% less expensive, making it a more accessible choice for casual photographers or those just starting with full-frame cameras. The Sigma lens’s higher price point reflects its advanced features and capabilities, which may justify the cost for professional users or those seeking specific functionalities.

Compatibility and System Integration

The Sigma 10-18mm F2.8 DC DN is designed exclusively for Sony E mount cameras, making it perfect for users within that ecosystem. Meanwhile, the Canon RF28mm F2.8 STM Lens is compatible with full-frame EOS R series cameras and can also be used with APS-C sensors, providing equivalent coverage of approximately 45mm. This flexibility makes the Canon lens an appealing option for a broader range of users, particularly those who may own different camera bodies.

Which should you buy?

Choosing between the Sigma 10-18mm F2.8 DC DN and the Canon RF28mm F2.8 STM Lens largely depends on your specific needs and camera system. If you are looking for an ultra-wide-angle zoom lens that excels in landscape and video creation, and you own a Sony E mount camera, the Sigma lens is a compelling choice. However, if you are a Canon user seeking a compact, versatile lens for everyday photography and videography, the Canon RF28mm lens, at a significantly lower price, offers excellent value. Ultimately, your choice should align with your camera system, photography style, and budget.