Canon EOS R100 Mirrorless Camera with RF-S18- vs Canon EOS R6 Mark III Mirrorless Camera with Extra
Updated August 2026 — Canon EOS R100 Mirrorless Camera with RF-S18- wins on portability, Canon EOS R6 Mark III Mirrorless Camera with Extra wins on video capability and autofocus.
The Canon EOS R100 is an excellent entry-level camera, while the EOS R6 Mark III is a superior choice for professionals. Choose based on your skill level and needs.
Why Canon EOS R100 Mirrorless Camera with RF-S18- is better
Price
R100 is significantly cheaper at $579.
Portability
R100 is the smallest and lightest in the EOS R series.
Beginner-friendly
R100 is designed for ease of use for new photographers.
Why Canon EOS R6 Mark III Mirrorless Camera with Extra is better
Image Quality
R6 Mark III has a 32.5MP full-frame sensor.
Video Performance
R6 Mark III shoots 4K at up to 40 fps.
Autofocus
R6 Mark III features advanced Dual Pixel CMOS AF II.
Overall score
Specifications
| Spec | Canon EOS R100 Mirrorless Camera with RF-S18- | Canon EOS R6 Mark III Mirrorless Camera with Extra |
|---|---|---|
| Sensor Type | APS-C | Full-frame |
| Max ISO | 25600 | 102400 |
| Autofocus | Dual Pixel AF | Dual Pixel AF II |
| Continuous Shooting | 6.5 fps | 40 fps |
| Video Resolution | 4K | 4K |
Dimension comparison
Pricing and Value
The Canon EOS R100 is priced at $579.00, making it about 79% cheaper than the Canon EOS R6 Mark III, which retails for $2,799.00. This significant price difference positions the EOS R100 as an attractive entry-level option for those new to mirrorless photography. While the R6 Mark III offers advanced features catering to professional users, the R100 provides essential functionalities at a fraction of the cost, appealing to hobbyists and casual users who prioritize value without sacrificing quality.
Image Quality
The Canon EOS R100 features a 24.1 megapixel CMOS (APS-C) sensor, delivering impressive image clarity and detail, especially valuable for budding photographers. In comparison, the EOS R6 Mark III boasts a 32.5MP full-frame CMOS sensor, allowing for even greater image resolution and performance in low-light conditions. The difference in sensor size and resolution means that while the R100 is excellent for most casual photography, the R6 Mark III is better suited for professional work where the highest image quality is paramount.
Video Capabilities
Both cameras offer 4K video capabilities, but they cater to different user needs. The Canon EOS R100 can shoot 4K video at up to 24 frames per second, making it suitable for basic video recording. On the other hand, the R6 Mark III provides the ability to shoot up to 40 frames per second, with pre-continuous shooting of 20 frames, allowing for more dynamic and action-oriented videography. This makes the R6 Mark III a superior choice for serious videographers looking to capture fast-paced scenes or events.
Autofocus Performance
Autofocus is a critical feature for photographers, and both cameras excel but differ significantly in technology. The Canon EOS R100 employs Dual Pixel CMOS AF with 143 zones, including advanced face and eye detection, which is beneficial for portrait photography. In contrast, the EOS R6 Mark III features Dual Pixel CMOS AF II, which enhances detection for people, animals, and vehicles, and registers people priority for more accurate focus tracking. This advanced autofocus system makes the R6 Mark III a better option for wildlife and sports photography, where fast and precise focusing is essential.
Build and Design
The Canon EOS R100 is noted for its compact and lightweight design, making it the smallest and lightest model in the EOS R series. This portability is a significant advantage for travel and street photography. Conversely, while the Canon EOS R6 Mark III is more robust, it is also bulkier, designed to accommodate more advanced features and dual card slots, including CFexpress and UHS-II SD cards. Users who prioritize ease of transport may prefer the R100, while those seeking a professional-grade build might lean towards the R6 Mark III.
Battery Life and Extras
The Canon EOS R6 Mark III comes with an extra Canon LP-E6P battery, which enhances its usability for extended shooting sessions, vital for professional photographers and videographers. The R100’s battery life is not specified, but typically entry-level models may have less endurance compared to higher-end counterparts like the R6 Mark III. The inclusion of a camera strap and charger with the R6 Mark III further adds value for users who need a complete package for immediate use.
User Experience
The Canon EOS R100 is designed with beginners in mind, featuring an intuitive interface and lightweight construction, making it easy for new users to handle. In contrast, the Canon EOS R6 Mark III, while user-friendly, offers more advanced controls and customization options, which may require a steeper learning curve for novices. This difference suggests that the R100 is ideal for casual shooters, while the R6 Mark III is tailored for those willing to invest time in mastering a more advanced camera system.
Which should you buy?
Choosing between the Canon EOS R100 and the Canon EOS R6 Mark III ultimately depends on your skill level and photography needs. If you're a beginner seeking a budget-friendly, compact camera for casual photography and basic videography, the R100 at $579.00 is an excellent choice. However, if you're an experienced photographer or videographer looking for advanced features, superior image quality, and enhanced performance, the R6 Mark III at $2,799.00 justifies its higher price point. Each camera serves its distinct audience well, making your personal requirements the deciding factor.

