Canon EF-S 10- vs Sigma 17-
Updated July 2026 — Canon EF-S 10- wins on aperture, Sigma 17- wins on price and weight.
The Canon EF-S 10-18mm lens offers great value for casual photographers, while the Sigma 17-40mm lens excels in optical performance for professionals.
Why Canon EF-S 10- is better
Price
Canon is significantly cheaper at $349.
Weight
Canon is lighter and more portable.
Video Use
Canon's quiet autofocus is ideal for video recording.
Why Sigma 17- is better
Optical Quality
Sigma delivers superior image quality with its Art-series optics.
Low-Light Performance
Sigma's constant F1.8 aperture excels in low-light conditions.
Build Quality
Sigma has a more robust and professional build.
Overall score
Specifications
| Spec | Canon EF-S 10- | Sigma 17- |
|---|---|---|
| Brand | Canon | Sigma |
| Type | Wide Angle | Zoom |
| Max Aperture | f/4.5-5.6 | f/1.8 |
| Image Stabilization | Yes | No |
| Autofocus | Stepping Motor | Standard |
Dimension comparison
Overview of the Canon EF-S 10-18mm f/4.5-5.6 is STM Lens
The Canon EF-S 10-18mm f/4.5-5.6 is STM Lens is designed for APS-C sensor cameras, providing an ultra-wide angle for various photography styles. Priced at $349.00, this lens combines optical excellence with a compact design, ideal for travel and everyday photography. Key features include a stepping motor for quiet video shooting and an optical image stabilizer, enhancing performance in dynamic scenarios.
The lens's unique design incorporates a 4 group optical zoom system, ensuring high-contrast and high-resolution images. Canon's Optical Image Stabilizer offers up to four equivalent stops of shake correction, making it a reliable choice for capturing sharp images in challenging lighting conditions.
Overview of the Sigma 17-40mm F1.8 DC
The Sigma 17-40mm F1.8 DC is a premium lens for Sony E-mount APS-C cameras, priced at $919.00. It features a constant bright aperture of F1.8, making it particularly suited for low-light photography and creative depth-of-field effects. The Art-series optics deliver exceptional sharpness and professional image quality, appealing to photographers who require high performance.
Designed for versatility, the Sigma lens excels in portraits, travel, and video applications. Its constant aperture allows for consistent exposure settings across the zoom range, providing flexibility in various shooting conditions. With its emphasis on optical performance, the Sigma lens stands out in the competitive landscape of camera lenses.
Build and Design Comparison
The Canon EF-S 10-18mm lens is compact and lightweight, making it easy to carry for travel and daily use. Its design emphasizes user-friendliness, featuring a rear focusing system and a refined autofocus mechanism. In contrast, the Sigma 17-40mm lens, while slightly bulkier, boasts a robust build quality typical of Sigma’s Art series. This sturdiness contributes to its professional appeal, though it may be less convenient for casual users.
Despite the differences in size, both lenses are designed with the photographer's needs in mind. The Canon's stepping motor allows for silent autofocus, which is ideal for video, while the Sigma's constant F1.8 aperture offers unparalleled control in low-light situations.
Optical Performance
In terms of optical performance, the Canon EF-S 10-18mm lens is equipped with advanced coatings and elements that minimize glare and aberration, resulting in high-resolution images. It features a circular aperture with seven blades, enhancing background blur, which is particularly beneficial for landscape and architecture photography.
Conversely, the Sigma 17-40mm lens is engineered for sharpness and detail, with its Art-series optics delivering images that meet professional standards. The constant F1.8 aperture allows for impressive low-light capabilities and depth-of-field control, making it a versatile choice for various photographic scenarios.
Focusing and Autofocus Features
Focusing is a critical aspect of both lenses, and each has unique features that cater to different needs. The Canon EF-S 10-18mm lens uses a stepping motor, ensuring quiet and smooth autofocus, which is particularly useful for video recording. This lens also supports full-time manual focus for quick adjustments, enhancing its usability in dynamic shooting environments.
On the other hand, the Sigma 17-40mm lens focuses on delivering fast and accurate autofocus performance, complemented by its constant aperture that allows photographers to maintain exposure settings throughout the zoom range. This feature is advantageous for those who shoot in changing light conditions or need to capture spontaneous moments.
Price Comparison
The Canon EF-S 10-18mm lens is priced at $349.00, making it about 62% cheaper than the Sigma 17-40mm lens, which retails for $919.00. This significant price difference may influence budget-conscious photographers who seek quality performance without breaking the bank.
While the Sigma lens offers advanced features and optical quality intended for professional use, the Canon lens provides an excellent balance of performance and affordability, making it a compelling option for hobbyists and casual users alike.
Use Cases and Target Audience
The Canon EF-S 10-18mm lens is ideal for travel photographers, vloggers, and anyone needing a versatile lens for dynamic environments. Its lightweight design and ultra-wide angle make it perfect for capturing expansive landscapes or architectural shots. The lens is also suitable for video production, thanks to its quiet autofocus capabilities.
In contrast, the Sigma 17-40mm lens targets more serious photographers who require exceptional optical quality and low-light performance. Its robust build and constant aperture make it well-suited for portraiture, travel, and professional video work. This lens is designed for those willing to invest in high-quality equipment to achieve superior results.
Which should you buy?
Deciding between the Canon EF-S 10-18mm f/4.5-5.6 is STM Lens and the Sigma 17-40mm F1.8 DC ultimately depends on your specific needs and budget. If you are looking for an affordable, lightweight lens that excels in casual photography and video, the Canon EF-S 10-18mm is the better choice at $349.00.
However, if you prioritize optical quality and low-light performance and are willing to invest more, the Sigma 17-40mm lens offers advanced features and exceptional image quality, making it worth the $919.00 price tag for serious photographers. Both lenses have their unique strengths, catering to different styles and preferences, ensuring there is an option for every type of photographer.

