Sigma 10- vs Canon RF100-
Updated July 2026 — Sigma 10- wins on focal length and price, Canon RF100- wins on weight and stabilization.
The Sigma 10-18mm F2.8 DC DN is ideal for wide-angle photography and portability, while the Canon RF100-400mm excels in telephoto capabilities and autofocus performance.
Why Sigma 10- is better
Price
Sigma is $20 cheaper than Canon
Portability
Sigma is lighter and more compact
Wide-angle
Sigma offers ultra-wide-angle capabilities
Why Canon RF100- is better
Autofocus
Canon features fast Nano USM autofocus
Image Stabilization
Canon has superior shake correction
Versatility
Canon's zoom range is more versatile for various subjects
Overall score
Specifications
| Spec | Sigma 10- | Canon RF100- |
|---|---|---|
| Aperture | F2.8 | F5.6-8 |
| Zoom Range | 10-18mm | 100-400mm |
| Compatibility | Sony E | Canon RF |
| Image Quality | High | Very High |
| Minimum Focus | N/A | 2.89ft |
Dimension comparison
Overview of the Sigma 10-18mm F2.8 DC DN
The Sigma 10-18mm F2.8 DC DN is designed for Sony E mount cameras, making it ideal for a range of photography styles, including landscapes and video content creation. Priced at $679.00, this lens offers a large aperture and ultra-wide-angle capabilities that are perfect for capturing expansive scenes. Its lightweight design makes it one of the smallest ultra-wide-angle zoom lenses available for APS-C cameras, which enhances its portability for on-the-go shooting.
Overview of the Canon RF100-400mm F5.6-8 IS USM
The Canon RF100-400mm F5.6-8 IS USM is a compact telephoto lens tailored for EOS R series cameras. At a price point of $699.00, this lens provides a versatile zoom range from 100mm to 400mm, making it suitable for wildlife and sports photography. This lens incorporates advanced features like Optical Image Stabilization, which offers up to 5.5 stops of shake correction, ensuring sharp images even at longer focal lengths.
Image Quality Comparison
When it comes to image quality, both lenses excel in their respective domains. The Sigma 10-18mm captures expressive images thanks to its large aperture and ultra-wide perspective, making it a great choice for landscape and travel photography. The Canon RF100-400mm, on the other hand, is engineered with a single Ultra Low Dispersion lens element that minimizes chromatic aberration, ensuring crisp and vibrant images. Each lens delivers high image quality, but the choice depends on your photographic needs—whether you prefer wide-angle shots with the Sigma or telephoto capabilities with the Canon.
Autofocus Performance
Autofocus performance is a significant consideration when choosing a lens. The Canon RF100-400mm features Canon's fast and quiet Nano USM technology, allowing for quick and precise focusing, which is essential for capturing fast-moving subjects. Conversely, while the Sigma 10-18mm does not specify autofocus technology, it is designed primarily for content creators and travel photographers, where the emphasis may be more on versatility and ease of use rather than speed alone. If autofocus speed is a priority, the Canon lens may have the edge.
Portability and Design
In terms of portability, the Sigma 10-18mm is notably the lightest and most compact option, making it very convenient for photographers who travel frequently. Weighing less than many of its competitors, it becomes a practical choice for those looking to minimize their gear load. The Canon RF100-400mm, while still compact for a telephoto lens, is slightly bulkier and heavier. If you're often on the move, the Sigma's design will likely be more appealing, allowing for easier handling during long shoots.
Compatibility and Versatility
Compatibility and versatility are crucial factors, particularly for photographers who own multiple camera systems. The Sigma 10-18mm is specifically designed for Sony E mount cameras, making it incompatible with Canon systems. In contrast, the Canon RF100-400mm is exclusively for Canon EOS R series cameras. If you already own a camera from one of these brands, that will heavily influence your choice, as the functionality and performance of each lens are optimized for their respective systems.
Price Consideration
When examining price, the Sigma 10-18mm is priced at $679.00, making it about 3% cheaper than the Canon RF100-400mm, which retails for $699.00. This slight price difference may not be a deciding factor for every buyer, but it can be significant for those on a tighter budget. The average pricing trend also shows that the Canon lens has been priced higher over the past 90 days, averaging $713.78, indicating that the Sigma may offer better value in the current market.
Which should you buy?
Choosing between the Sigma 10-18mm F2.8 DC DN and the Canon RF100-400mm F5.6-8 IS USM ultimately depends on your specific photography needs. If you prioritize wide-angle capabilities, portability, and a slightly lower price, the Sigma lens is the better option. However, if you need a telephoto lens with advanced autofocus features and superior image stabilization, the Canon lens stands out. Each lens shines in its own right, so consider what types of photography you engage in most often before making a decision.

