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Canon EOS R100 Mirrorless Camera with RF-S18- vs Sony ILCE-7M3K/B a7 III 24.

Updated August 2026 — Canon EOS R100 Mirrorless Camera with RF-S18- wins on design, Sony ILCE-7M3K/B a7 III 24. wins on shooting speed and autofocus.

The Canon EOS R100 is a budget-friendly option ideal for beginners, while the Sony ILCE-7M3K offers advanced features for professionals.

Why Canon EOS R100 Mirrorless Camera with RF-S18- is better

Price

Canon is significantly cheaper at $579.

Portability

Canon is the smallest and lightest in its series.

Included Accessories

Canon includes a shoulder bag and memory card.

Why Sony ILCE-7M3K/B a7 III 24. is better

Image Quality

Sony has a superior full-frame sensor.

Autofocus

Sony's autofocus system is more advanced.

Video Capabilities

Sony offers 4K HDR recording.

Overall score

Canon EOS R100 Mirrorless Camera with RF-S18-
75
Sony ILCE-7M3K/B a7 III 24.
88

Specifications

SpecCanon EOS R100 Mirrorless Camera with RF-S18-Sony ILCE-7M3K/B a7 III 24.
Sensor TypeAPS-CFull Frame
Megapixels24.1MP24.2MP
ISO Range100-1280050-204800
Continuous Shooting6.5 fps10 fps
Video Resolution4K4K HDR

Dimension comparison

Canon EOS R100 Mirrorless Camera with RF-S18-Sony ILCE-7M3K/B a7 III 24.

Price Comparison

When it comes to pricing, the Canon EOS R100 is significantly more budget-friendly. Priced at $579.00, it is about 70% cheaper than the Sony ILCE-7M3K, which retails for $1,898.00. This substantial price difference makes the Canon a more accessible option for amateur photographers or those just starting in the mirrorless camera space. With the Canon's lower price point, you can invest more in accessories or additional lenses without breaking the bank. Meanwhile, the Sony, being a high-end model, justifies its price with advanced features aimed at professionals or serious enthusiasts.

Image Quality

In terms of image quality, both cameras offer impressive specifications, but they cater to different needs. The Canon EOS R100 features a 24.1 megapixel CMOS (APS-C) sensor, capturing high-quality images with natural bokeh. On the other hand, the Sony ILCE-7M3K boasts a 24.2MP Back-Illuminated Full-frame sensor, which provides superior low-light performance and dynamic range. The Sony's 15-stop dynamic range and the ability to shoot with ISO settings ranging from 50 to 204,800 give it a distinct advantage in challenging lighting conditions. For photographers seeking the best possible image quality, the Sony is likely the better choice.

Autofocus System

The autofocus systems of both cameras lend themselves to different shooting styles. The Canon EOS R100 features Dual Pixel CMOS AF, covering 143 zones with human face and eye detection, making it effective for portrait photography and general shooting. It allows for continuous capture of up to 6.5 frames per second in One-Shot AF mode. In contrast, the Sony ILCE-7M3K excels with its 693 phase-detection and 425 contrast AF points, offering 93% image coverage. This advanced tracking system allows for up to 10 frames per second shooting with AE/AF tracking, making it ideal for fast-paced situations like sports or wildlife photography.

Video Capabilities

When it comes to video capabilities, both cameras offer 4K recording but with different specifications. The Canon EOS R100 can capture 4K video at up to 24 frames per second, making it suitable for casual video recording. However, the Sony ILCE-7M3K takes it a step further with its 4K HDR movie recording, providing more options for professional videography. The Sony’s advanced sensor and processing capabilities allow for smoother video quality, making it a better fit for serious videographers.

Build Quality and Design

In terms of build quality and design, the Canon EOS R100 is compact and lightweight, making it the smallest and lightest camera in the EOS R series. This design is excellent for mobility, especially for travel photography. However, the Sony ILCE-7M3K, while slightly larger, is built for durability and reliability. Its body is designed to withstand rigorous use, which can be beneficial for professional photographers who require a camera that can handle tough environments. Ultimately, the choice depends on whether you prioritize portability or ruggedness.

Included Accessories

The Canon EOS R100 comes bundled with a camera shoulder bag and a 64GB memory card, adding extra value to its price. These accessories are essential for new users who might not have invested in them yet. Conversely, the Sony ILCE-7M3K includes a standard kit lens (28-70mm) and various protective caps but does not come with a dedicated memory card or bag. This may require additional expenditure for those who need these items, making the Canon a more complete package right out of the box.

Sales Performance

Sales performance reflects consumer preference and the Canon EOS R100 holds a bestseller rank of 31,530, while the Sony ILCE-7M3K has a higher rank of 13,996. This indicates that the Sony has garnered more attention and preference among buyers, likely due to its advanced features and professional appeal. However, the Canon’s sales rank shows that it is still a popular choice, particularly for those looking for a cost-effective entry into mirrorless photography.

Which should you buy?

Choosing between the Canon EOS R100 and the Sony ILCE-7M3K ultimately depends on your photography needs and budget. If you are a beginner or casual photographer looking for an affordable camera with good image quality, the Canon EOS R100 is the clear winner at $579.00. However, if you are a professional or serious enthusiast willing to invest more for advanced features, superior image quality, and enhanced video capabilities, the Sony ILCE-7M3K is worth the $1,898.00 price tag.