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Canon EOS R100 Mirrorless Camera RF-S18- vs Canon EOS R6 Mark III Body

Updated August 2026 — Canon EOS R100 Mirrorless Camera RF-S18- wins on portability, Canon EOS R6 Mark III Body wins on build quality and video capability.

The Canon EOS R100 is a budget-friendly option suitable for entry-level photographers, while the Canon EOS R6 Mark III offers advanced features for professionals. Choose based on your photography needs and budget.

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

Price

R100 is significantly cheaper at $579.

Portability

R100 is the smallest and lightest in the EOS R series.

User-Friendly

R100 is designed for entry-level photographers.

Why Canon EOS R6 Mark III Body is better

Image Quality

R6 Mark III has a 32.5MP full-frame sensor.

Autofocus

R6 Mark III features advanced Dual Pixel CMOS AF II.

Video Capabilities

R6 Mark III can shoot 4K at 120 fps.

Overall score

Canon EOS R100 Mirrorless Camera RF-S18-
75
Canon EOS R6 Mark III Body
90

Specifications

SpecCanon EOS R100 Mirrorless Camera RF-S18-Canon EOS R6 Mark III Body
Sensor TypeAPS-CFull-Frame
Image ProcessorDIGIC 8DIGIC X
Video Resolution4K4K
AutofocusDual Pixel AFDual Pixel AF II
Max ISO25600102400

Dimension comparison

Canon EOS R100 Mirrorless Camera RF-S18-Canon EOS R6 Mark III Body

Price Comparison

The Canon EOS R100 Mirrorless Camera is significantly more budget-friendly than the Canon EOS R6 Mark III Body, priced at $579.00 compared to the R6 Mark III's $2,799.00. This difference of $2,220.00 makes the R100 about 79% cheaper, appealing to entry-level photographers and those seeking a reliable camera without breaking the bank. While both cameras are from the reputable Canon brand, the R6 Mark III's price reflects its advanced features and capabilities, making it a choice for professional photographers.

Image Quality

When it comes to image quality, the Canon EOS R6 Mark III outshines the R100 with its 32.5MP full-frame CMOS Image Sensor, compared to the R100's 24.1MP APS-C sensor. The R6 Mark III's higher resolution allows for more detailed images, ideal for large prints or extensive cropping. However, the R100 still delivers impressive results, thanks to its DIGIC 8 image processor and the ability to record 4K video, which makes it suitable for casual users looking for great stills and video. The image quality difference reflects the intended audience: the R100 for enthusiasts and the R6 Mark III for professionals.

Autofocus System

The autofocus capabilities of the Canon EOS R6 Mark III are superior, utilizing Dual Pixel CMOS AF II, which offers advanced detection for people, animals, and vehicles. This is a significant upgrade over the R100's Dual Pixel CMOS AF that covers 143 zones and includes face and eye detection. While the R100 is capable of continuous capture at 6.5 frames per second, the R6 Mark III can shoot at an impressive 40 frames per second with pre-continuous shooting. This makes the R6 Mark III more suited for fast-paced photography, such as sports or wildlife, providing a clear advantage for professionals.

Video Capabilities

Both cameras excel in video recording, but the Canon EOS R6 Mark III takes the lead with its ability to shoot 4K video at up to 120 frames per second, allowing for high-quality slow-motion footage. In contrast, the R100 records 4K video at 24 frames per second, which is adequate for basic video needs but lacks the versatility offered by the R6 Mark III. Additionally, the R6 Mark III supports advanced features like Canon Log 2 color and 7K RAW recording, making it a more robust option for videographers who require high production quality.

Design and Portability

The Canon EOS R100 is designed for portability and ease of use, being the smallest and lightest camera in the EOS R series. This compact design makes it an excellent choice for travelers or those who prefer a lightweight setup. In contrast, while the R6 Mark III is not overly bulky, it is larger due to its full-frame capabilities and advanced features. Users seeking a camera that they can quickly carry around without added weight will find the R100's design to be a significant advantage.

Target Audience

The Canon EOS R100 targets entry-level photographers and content creators looking for a versatile, affordable camera that still delivers quality images and video. Its features cater to beginners transitioning to mirrorless technology. On the other hand, the Canon EOS R6 Mark III is aimed at professionals and serious enthusiasts who demand high performance, advanced features, and exceptional image quality. This clear distinction in target audience is reflected in their respective prices and capabilities.

Sales Rank

In terms of sales rank, the Canon EOS R100 holds a better position at 5,316, indicating a stronger performance in the market compared to the R6 Mark III, which ranks at 10,303. This suggests that the R100 has been more popular among consumers, likely due to its affordability and user-friendly features, appealing to a broader audience. The R6 Mark III, while perhaps less frequently purchased, remains the choice for those who prioritize advanced capabilities over budget considerations.

Which should you buy?

Choosing between the Canon EOS R100 and the Canon EOS R6 Mark III largely depends on your photography needs and budget. If you are an entry-level photographer or hobbyist seeking an affordable option that still offers excellent image quality and portability, the R100 is the clear choice at $579.00. However, if you are a professional or serious enthusiast in need of superior image quality, advanced features, and high-speed performance, the R6 Mark III at $2,799.00 would be the better investment. Assessing your specific requirements will guide your decision effectively.