Sigma 10- vs Canon RF 75-
Updated July 2026 — Sigma 10- wins on aperture and portability, Canon RF 75- wins on weight and size.
The Sigma lens excels in wide-angle photography and low-light performance, while the Canon lens offers great versatility at a lower price.
Why Sigma 10- is better
Wide Angle
Ideal for landscapes and video
Aperture
Larger f/2.8 aperture for low light
Portability
World's smallest ultra-wide lens
Why Canon RF 75- is better
Price
Significantly cheaper option
Focal Range
Versatile 75-300mm range
Weight
Lightweight design for travel
Overall score
Specifications
| Spec | Sigma 10- | Canon RF 75- |
|---|---|---|
| Max Aperture | f/2.8 | f/4-5.6 |
| Focal Length | 10-18mm | 75-300mm |
| Autofocus | Fast | Responsive |
| Ideal Use | Landscapes | Sports |
| Price | $679.00 | $253.95 |
Dimension comparison
Overview of the Lenses
The Sigma 10-18mm F2.8 DC DN is designed for ultra-wide-angle photography, while the Canon RF 75-300mm f/4-5.6 Lens specializes in telephoto applications. Each lens serves different purposes, catering to distinct photographic needs. The Sigma lens is priced at $679.00, making it a premium choice for landscape and content creators. In contrast, the Canon lens is considerably more budget-friendly at $253.95, targeting everyday photographers seeking versatility without breaking the bank.
Target Audience
The Sigma 10-18mm F2.8 DC DN is ideal for landscape, travel, and video creators who want expressive imaging capabilities in a compact form. Its ultra-wide-angle design is perfect for capturing expansive scenes or dynamic perspectives. Alternatively, the Canon RF 75-300mm f/4-5.6 Lens is aimed at sports, wildlife, and portrait photographers. With a versatile focal range of 75-300mm, it allows for distant subject capture while remaining lightweight and easy to handle, making it suitable for everyday use.
Aperture and Low Light Performance
In terms of aperture, the Sigma lens boasts a large F2.8 maximum aperture, ensuring excellent low-light performance and shallow depth of field effects. This feature is particularly beneficial for those who often shoot in challenging lighting conditions. On the other hand, the Canon RF 75-300mm lens has a variable aperture of f/4-5.6, which, while effective for a wide range of scenarios, may not perform as well in low-light situations compared to the Sigma lens. Thus, for photographers prioritizing low-light capability, the Sigma lens may offer a significant advantage.
Build Quality and Portability
The Sigma 10-18mm F2.8 DC DN is recognized as the world's smallest and lightest ultra-wide-angle zoom lens for APS-C cameras, enhancing its portability for travel and on-the-go photography. In contrast, the Canon RF 75-300mm lens, weighing just over 1 lb, also prioritizes portability but offers a different kind of flexibility with its telephoto reach. While both lenses are designed for easy transportation, the Sigma lens takes the lead in terms of compactness for wide-angle needs, making it more appealing for those who require a lightweight option.
Image Quality and Optical Performance
When it comes to image quality, the Sigma lens promises expressive imaging capabilities, particularly suitable for landscapes and creative content. Meanwhile, the Canon RF 75-300mm lens features an optical design optimized for sharpness and clarity, incorporating Canon’s Super Spectra Coating to reduce lens flare and ghosting. This ensures that even in challenging lighting, images maintain high contrast and color fidelity. Photographers who prioritize image quality will find both lenses capable, but the choice may be dictated by specific shooting conditions.
Autofocus Capabilities
The Sigma 10-18mm F2.8 DC DN lens is designed for quick and responsive autofocus, which is crucial for capturing dynamic scenes, especially in video work. On the other hand, the Canon RF 75-300mm lens utilizes a DC motor for its autofocus system, offering responsive and accurate focusing performance for both stills and video. Although both lenses provide reliable autofocus, the Sigma lens's focus speed may give it an edge in fast-paced shooting environments.
Price Comparison
The Sigma 10-18mm F2.8 DC DN is priced at $679.00, while the Canon RF 75-300mm is significantly cheaper at $253.95, making it about 63% less expensive. This price difference is substantial and may play a critical role for consumers on a budget. Those who require high-quality optics and are willing to invest more will see value in the Sigma lens, while budget-conscious photographers looking for versatility will find the Canon lens appealing.
Which should you buy?
Choosing between the Sigma 10-18mm F2.8 DC DN and the Canon RF 75-300mm f/4-5.6 Lens ultimately depends on your specific photographic needs. If you're focused on wide-angle photography and require superior low-light performance, the Sigma lens is a worthy investment. Conversely, if you need a flexible telephoto option that is easy to carry and offers great value at a lower price point, the Canon lens is the better choice. Each lens excels in its respective domain, making them both excellent tools for different types of photography.

