Canon EOS R100 Mirrorless Camera with RF-S 18- vs Sony Alpha 7 III Full Frame Mirrorless Camera Kit with 28-
Updated August 2026 — Canon EOS R100 Mirrorless Camera with RF-S 18- wins on portability and ease of use, Sony Alpha 7 III Full Frame Mirrorless Camera Kit with 28- wins on weight and build.
The Canon EOS R100 is a budget-friendly option ideal for beginners, while the Sony Alpha 7 III offers superior performance for professionals.
Why Canon EOS R100 Mirrorless Camera with RF-S 18- is better
Affordability
Canon EOS R100 is significantly cheaper.
Beginner-friendly
Canon is designed for easy use.
Compact size
Canon is lightweight and portable.
Why Sony Alpha 7 III Full Frame Mirrorless Camera Kit with 28- is better
Image Quality
Sony has a full-frame sensor.
Autofocus
Sony features advanced Eye AF.
Video Capabilities
Sony records oversampled 4K video.
Overall score
Specifications
| Spec | Canon EOS R100 Mirrorless Camera with RF-S 18- | Sony Alpha 7 III Full Frame Mirrorless Camera Kit with 28- |
|---|---|---|
| Sensor | 24.1MP APS-C | 24.2MP Full-Frame |
| Autofocus | Dual Pixel AF | 693 Phase + 425 Contrast |
| Video | Full HD 60p | 4K Oversampled |
| Lens | RF-S 18-45mm | 28-70mm |
| Price | $579 | $1898 |
Dimension comparison
Price Comparison
The Canon EOS R100 is significantly more affordable than the Sony Alpha 7 III. Priced at $579.00, the Canon model is about 69% cheaper than the Sony, which costs $1,898.00. This price difference makes the Canon a compelling option for those who are budget-conscious but still want to explore mirrorless photography. The lower price point of the Canon EOS R100 is especially attractive for beginners looking to enter the photography world without a substantial financial commitment.
Image Quality
Both the Canon EOS R100 and the Sony Alpha 7 III deliver impressive image quality, but they cater to different user needs. The Canon features a 24.1MP APS-C CMOS sensor, which provides vibrant and detailed images suitable for everyday photography. In contrast, the Sony offers a slightly higher 24.2MP full-frame Exmor R CMOS sensor that excels in dynamic range and low-light performance, making it ideal for professional photography. For those prioritizing top-tier image quality and versatility across various lighting conditions, the Sony may be the more suitable choice.
Autofocus Performance
Autofocus capabilities differ notably between the two cameras. The Canon EOS R100 employs Canon's Dual Pixel CMOS AF system with 143 AF zones, ensuring rapid and accurate focusing. This is particularly effective for tracking subjects in motion or adjusting between stills and video seamlessly. On the other hand, the Sony Alpha 7 III boasts a more advanced system with 693 phase-detection and 425 contrast-detection points. This enhanced autofocus system allows for precise Eye AF tracking, making it an excellent choice for capturing fast-moving subjects, especially in challenging lighting situations.
Video Recording
When it comes to video recording capabilities, the Sony Alpha 7 III takes the lead with its ability to record oversampled 4K video, providing exceptional detail and cinematic depth. It also supports S-Log3 and HLG for advanced color grading. The Canon EOS R100, while capable of Full HD video at 60p, falls short in comparison. For content creators focused on high-quality video output, the Sony's features offer greater flexibility and control, making it a better fit for professional filming needs.
Lens Included
The lens included with each camera also reflects their respective target audiences. The Canon EOS R100 comes with an RF-S 18-45mm f/4.5-6.3 IS STM lens, which is versatile for general photography, from portraits to landscapes. This lens is designed for beginners, balancing quality with ease of use. Conversely, the Sony Alpha 7 III is bundled with a 28-70mm lens, providing flexibility for both wide-angle and portrait shots. The inclusion of a quality lens in both kits enhances their overall value, but the choice of lens may sway photographers depending on their specific needs.
User Experience
User experience is another crucial aspect where these cameras diverge. The Canon EOS R100 is designed with beginners in mind, offering auto scene modes and simplified menu navigation for a more intuitive learning curve. Its compact size and lightweight design make it easy to carry for everyday shooting. In contrast, the Sony Alpha 7 III, while still user-friendly, features a more complex interface that may require a steeper learning curve for novice photographers. However, this complexity pays off for advanced users who benefit from the extensive customization options and controls available.
Accessories and Bundles
Both cameras come with a variety of accessories, adding value to their respective packages. The Canon EOS R100 kit includes a shoulder bag, a 64GB card, and several essential items to get started right away. In comparison, the Sony Alpha 7 III offers a more extensive bundle that includes not just the camera and lens but also a cleaning kit and other accessories like a dust blower and lens pen. This comprehensive package is particularly appealing for those who want to ensure their gear is well-maintained and ready for use.
Which should you buy?
Choosing between the Canon EOS R100 and the Sony Alpha 7 III ultimately hinges on your photography needs and budget. If you're a beginner looking for an affordable and user-friendly entry into mirrorless photography, the Canon EOS R100, priced at $579.00, offers a solid foundation with its APS-C sensor and versatile lens. However, if you're a more experienced photographer or videographer seeking superior image quality, autofocus performance, and video capabilities, the Sony Alpha 7 III at $1,898.00 is worth the investment. Each camera has its strengths, so consider what features matter most to you before making a decision.

