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

Updated August 2026 — Canon EOS R100 Mirrorless Camera RF-S18- wins on price and usability, Canon EOS R6 Mark III Mirrorless Camera with Extra wins on weight and battery.

The Canon EOS R100 is an excellent entry-level camera, while the EOS R6 Mark III offers superior performance for professionals.

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 beginners with straightforward controls.

Why Canon EOS R6 Mark III Mirrorless Camera with Extra 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 Performance

R6 Mark III can shoot at up to 40 fps.

Overall score

Canon EOS R100 Mirrorless Camera RF-S18-
70
Canon EOS R6 Mark III Mirrorless Camera with Extra
90

Specifications

SpecCanon EOS R100 Mirrorless Camera RF-S18-Canon EOS R6 Mark III Mirrorless Camera with Extra
Sensor24.1MP APS-C32.5MP Full-Frame
Video4K at 24 fps40 fps continuous
Autofocus143 zonesDual Pixel AF II
Continuous Shooting6.5 fps40 fps
Weight0.5 kg0.7 kg

Dimension comparison

Canon EOS R100 Mirrorless Camera RF-S18-Canon EOS R6 Mark III Mirrorless Camera with Extra

Overview

The Canon EOS R100 is priced at $579.00, making it about 79% cheaper than the Canon EOS R6 Mark III, which costs $2,799.00. This vast price difference highlights two distinct market segments for these mirrorless cameras. The EOS R100 is designed for entry-level users seeking a compact camera with robust features, while the EOS R6 Mark III targets professionals requiring advanced technology and higher performance in photography and videography.

Image Quality

The Canon EOS R100 features a 24.1 megapixel APS-C sensor, providing excellent image clarity and detail, making it suitable for casual photography and videography. It captures stunning 4K video, although at a maximum of 24 frames per second. In comparison, the Canon EOS R6 Mark III offers an impressive 32.5MP full-frame sensor, delivering superior image quality, especially in low-light conditions. This camera can shoot at up to 40 frames per second, making it ideal for fast-action photography. Thus, for users who prioritize high-resolution images and versatility, the EOS R6 Mark III stands out.

Autofocus Capabilities

The EOS R100 employs Dual Pixel CMOS AF with 143 zones, excelling in human face and eye detection, which is particularly beneficial for portraits and everyday shooting. This model also captures up to 6.5 shots per second, making it suitable for basic action photography. Conversely, the EOS R6 Mark III features the advanced Dual Pixel CMOS AF II, which includes enhanced detection for people, animals, and vehicles. This autofocus system supports various photography genres, including wildlife and sports, due to its responsiveness and accuracy. Therefore, the R6 Mark III's autofocus capabilities cater to more demanding photographic scenarios.

Video Performance

Video capabilities differ significantly between the two models. The EOS R100 can shoot 4K video at 24 fps and Full HD video at 60 fps, making it a solid choice for beginner filmmakers looking to explore content creation. However, the EOS R6 Mark III offers a plethora of video features, including up to 40 fps continuous shooting in photo mode and enhanced in-body stabilization, making it a superior choice for professional videography. The ability to capture high-speed sequences and the inclusion of advanced image stabilization technology in the R6 Mark III make it more appealing for serious video projects.

Design and Portability

The Canon EOS R100 is designed to be compact and lightweight, making it the smallest and lightest camera in the EOS R series. This portability is a significant advantage for users who prioritize mobility in their photography. The camera’s design suits casual photographers who may not want the bulk of larger models. On the other hand, the EOS R6 Mark III, while still relatively portable for a full-frame camera, is larger and heavier, given its professional-grade features. Thus, the R100 is ideal for those needing a camera that is easy to carry, while the R6 Mark III is better suited for users who require more advanced functionality despite the additional weight.

Battery Life

In terms of power, the EOS R6 Mark III includes an extra Canon LP-E6P battery, enhancing its longevity during extended shooting sessions. While specific battery life details aren’t provided, the inclusion of a second battery indicates a focus on usability for professional environments where long shooting days are common. Conversely, the EOS R100 does not mention any additional battery packs, which may limit its usability during prolonged use. Users expecting to shoot extensively without frequent recharging may find the R6 Mark III more accommodating in this aspect.

Usability and Features

The Canon EOS R100 is designed with beginner users in mind, featuring a user-friendly interface and straightforward controls that make it easy to operate. Its compact design and lightweight body further enhance its usability for newcomers to photography. In contrast, the EOS R6 Mark III, with its more complex features and capabilities, caters to experienced photographers who require advanced settings and controls to fine-tune their shots. The dual card slots in the R6 Mark III, including a CFexpress Type B card, also offer greater flexibility for professional users needing to manage large files efficiently.

Which should you buy?

Choosing between the Canon EOS R100 and the Canon EOS R6 Mark III ultimately depends on your photography needs and budget. The EOS R100, priced at $579.00, is an excellent option for beginners or casual photographers looking for a lightweight and easy-to-use camera. In contrast, the EOS R6 Mark III, at $2,799.00, is tailored for professionals seeking high performance, advanced features, and superior image quality. If you’re serious about photography or videography and require the best technology available, the R6 Mark III is worth the investment. However, for users just starting or seeking a more budget-friendly option, the R100 offers exceptional value without overwhelming complexity.