Canon EOS R100 Mirrorless Camera RF-S18- vs Sony Alpha a6400 Mirrorless Camera: Compact APS-C
Updated August 2026 — Canon EOS R100 Mirrorless Camera RF-S18- wins on ease of use and portability, Sony Alpha a6400 Mirrorless Camera: Compact APS-C wins on build quality and battery life.
The Canon EOS R100 is a more portable and budget-friendly option, while the Sony Alpha a6400 offers advanced features and superior autofocus.
Why Canon EOS R100 Mirrorless Camera RF-S18- is better
Portability
Canon is the smallest and lightest in the EOS R series.
Price
Canon is approximately 30% cheaper than Sony.
User-Friendly
Canon is designed for ease of use, ideal for beginners.
Why Sony Alpha a6400 Mirrorless Camera: Compact APS-C is better
Autofocus
Sony has 425 phase and contrast detection points.
Video Features
Sony supports time-lapse and slow/quick motion videos.
Image Technology
Sony uses a stacked back illuminated sensor for better low-light performance.
Overall score
Specifications
| Spec | Canon EOS R100 Mirrorless Camera RF-S18- | Sony Alpha a6400 Mirrorless Camera: Compact APS-C |
|---|---|---|
| Megapixels | 24.1MP | 20.1MP |
| Sensor Type | APS-C | APS-C |
| Video Resolution | 4K at 24fps | 4K at 30fps |
| Autofocus Points | 143 | 850 |
| Price | $579.00 | $835.90 |
Dimension comparison
Design and Portability
The Canon EOS R100 is considerably more compact and lightweight compared to the Sony Alpha a6400. Weighing less, the Canon model is marketed as the smallest and lightest in the EOS R series, making it a great choice for those prioritizing mobility. The Canon's design is tailored for excellent portability, making it a suitable companion for travel and on-the-go photography.
In contrast, the Sony Alpha a6400, while still compact, is slightly bulkier due to its construction. It features a tiltable LCD screen which adds versatility for various shooting angles, particularly for vlogging or professional filming. However, this design feature does not outweigh the R100’s advantage in terms of sheer portability.
Image Quality
When it comes to image quality, the Canon EOS R100 boasts a 24.1 megapixel APS-C sensor, delivering stunning image clarity and natural bokeh effects. This high-resolution sensor is ideal for capturing detailed stills and 4K video, enhancing the overall versatility of the camera.
On the other hand, the Sony Alpha a6400 features a 20.1MP stacked back illuminated Exmor RS CMOS sensor. While slightly lower in megapixels, it utilizes advanced technology for enhanced image quality, including high ISO performance and better low-light capabilities. Both cameras provide excellent image quality, but the Canon offers a higher resolution, which may be a deciding factor for photographers seeking maximum detail.
Autofocus Performance
The Canon EOS R100 features advanced Dual Pixel CMOS AF with 143 focus zones, enabling precise human face and eye detection. This autofocus system is particularly beneficial for capturing moving subjects and ensures sharp focus in both stills and video.
Conversely, the Sony Alpha a6400 excels with its 425 phase and 425 contrast detection points, covering over 84% of the sensor. This extensive autofocus system allows for rapid and accurate subject capture, making it a stellar choice for action shots or fast-moving subjects. While both cameras excel in autofocus performance, the Sony's system may provide a slight edge in speed and versatility.
Video Capabilities
Both cameras offer impressive video features, but they cater to different needs. The Canon EOS R100 can record 4K video at 24 frames per second, along with Full HD capabilities at 60 fps. This makes it an ideal entry-level option for videographers looking for high-quality footage without breaking the bank.
Meanwhile, the Sony Alpha a6400 also supports 4K video recording, but it allows additional features like time-lapse and slow/quick motion videos without post-processing. This added functionality may appeal to more advanced users interested in creative video projects. The choice between these cameras for video may depend on the specific requirements and level of expertise of the user.
Pricing
The Canon EOS R100 is priced at $579.00, making it approximately 30% cheaper than the Sony Alpha a6400, which retails for $835.90. This significant price difference makes the Canon an attractive option for beginners or those on a budget.
Despite the higher price, the Sony Alpha a6400 justifies its cost with advanced features and superior autofocus capabilities. However, for users seeking a capable mirrorless camera without spending too much, the R100 presents a compelling offer.
Sales Rank and Market Position
In terms of market presence, the Canon EOS R100 has a sales rank of 5316, while the Sony Alpha a6400 is slightly higher at 5200. Both cameras have established themselves well within the mirrorless camera category, appealing to different segments of photographers and videographers.
The similarity in sales rank indicates that both products are popular choices among consumers, but the slight edge for the Sony may reflect its broader feature set and brand loyalty. This factor could influence potential buyers, especially those who prioritize brand reputation in their purchasing decisions.
User Experience
The Canon EOS R100 is designed for ease of use, making it a great entry point for those new to mirrorless cameras. The compact design combined with a user-friendly interface allows for quick adjustments and seamless shooting. The camera's lightweight nature enhances user experience during extended usage, whether for photography or videography.
On the other hand, the Sony Alpha a6400 provides a more comprehensive suite of features that cater to experienced users. Its customizable settings and advanced functionalities allow for greater creative control. However, this complexity may be daunting for beginners, making it less accessible than the Canon for those just starting in photography.
Which should you buy?
The decision between the Canon EOS R100 and the Sony Alpha a6400 ultimately hinges on your specific needs and budget. If portability, ease of use, and a lower price point are your top priorities, the Canon EOS R100 is a fantastic choice. It offers excellent image quality, advanced autofocus, and impressive video capabilities at a more accessible price.
However, if you seek advanced features, superior autofocus performance, and are willing to invest more for enhanced functionality, the Sony Alpha a6400 could be the better option for you. Both cameras have their strengths, so consider your photography style and requirements carefully before making a purchase.

