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Canon EOS R6 Mark IIIvsCanon EOS R100: Which to Buy

The Canon EOS R6 Mark III and Canon EOS R100 both use the Canon RF lens mount. They differ sharply in their sensor formats and professional features, which dictate whether you get a high-end hybrid powerhouse or an ultra-light entry-level shooter.

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Intro

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Best for

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Biggest differences

  • Native ISO maximum

    Canon EOS R6 Mark III leads

    5×

    higher is better

    • Canon EOS R6 Mark III64,000 ISO
    • Canon EOS R10012,800 ISO

  • 4K max frame rate

    Canon EOS R6 Mark III leads

    4.8×

    higher is better

    • Canon EOS R6 Mark III119.9 fps
    • Canon EOS R10025 fps

  • Memory card slots

    Canon EOS R6 Mark III leads

    2×

    higher is better

    • Canon EOS R6 Mark III2 slots
    • Canon EOS R1001 slots

  • Weight

    Canon EOS R100 leads

    1.96×

    lower is better

    • Canon EOS R6 Mark III699 g
    • Canon EOS R100356 g

Features not all of them have

Log profile support

  • Canon EOS R6 Mark III✓
  • Canon EOS R100✕

USB charging & power delivery

  • Canon EOS R6 Mark III✓
  • Canon EOS R100✕

Headphone port

  • Canon EOS R6 Mark III✓
  • Canon EOS R100✕

Where each one wins

  • Canon EOS R6 Mark III

    • Effective pixels
    • Sensor format
    • Native ISO maximum
    • In-body image stabilization
    • Continuous shooting (mechanical)
    • Continuous shooting (electronic)
    • Max mechanical shutter speed
    • Max video resolution
    • 4K max frame rate
    • 4K max frame rate (full width)
    • Raw video recording
    • Video bit depth
    • Log profile support
    • Viewfinder resolution
    • Viewfinder magnification
    • Screen articulation
    • Rear screen resolution
    • Battery life
    • Memory card slots
    • Weather sealing
    • USB charging & power delivery
    • Headphone port
    • HDMI port type

  • Canon EOS R100

    • Weight
    • Width
    • Height
    • Depth

What both have

  • Lens mountCanon RF
  • Sensor typeCMOS
  • Screen size3 in
  • Minimum operating temperature0 °C

Every spec

Red marks the better value in each row.

SpecCanon EOS R6 Mark IIICanon EOS R100
Overview

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Overview specs

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Release date2025-11Not published
Launch price2,799 USDNot published
Lens mountCanon RFCanon RF
High resolution pixel-shift modeNoNot published
Sensor & Image

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Sensor & Image specs

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Effective pixels32.5 MP24.1 MP
Sensor formatFull-frameAPS-C
Native ISO maximum64,000 ISO12,800 ISO1
In-body image stabilization8.5 stops20 stops3
Sensor readout speed13.2 msNot published
Sensor typeCMOSCMOS
Aspect ratios3:23:2, 4:3, 1:1, 16:9
Lens & Autofocus

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Lens & Autofocus specs

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Continuous shooting (mechanical)12 fps6.5 fps
Continuous shooting (electronic)40 fps0 fps4
Max mechanical shutter speed8,000 1/s4,000 1/s
Pre-burst capture duration0.5 s5Not published
AF subject detectionHuman, animal, bird, car, train, airplane, motorcycle6Human
Video

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Video specs

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Max video resolution7K74K
4K max frame rate119.9 fps25 fps
Video codecsH.264, HEVC, XF-AVC, XF-HEVCH.264
4K max frame rate (full width)120 fps80 fps9
Raw video recordingInternalNone
Video bit depth10 bit8 bit
Log profile supportYesNo
Video dynamic range (log)15 stops10Not published
Viewfinder & Screen

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Viewfinder & Screen specs

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Viewfinder resolution3.69 M dots2.36 M dots
Viewfinder magnification0.76 x0.59 x11
Screen size3 in3 in
Screen articulationFully articulatedFixed
Rear screen resolution1.6 M dots1.04 M dots
Handling & Power

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Handling & Power specs

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Battery life620 shots12430 shots
Memory card slots2 slots1 slots
Weather sealingDust and drip resistantNone
Weight699 g356 g13
Width138.4 mm116.3 mm
Height98.4 mm85.5 mm
Depth88.4 mm68.8 mm
USB charging & power deliveryYes14No15
Minimum operating temperature0 °C0 °C
Headphone portYesNo
HDMI port typeFull-sizeMicro
Notes on 15 values — test conditions and caveats
  1. 1Canon EOS R100, Native ISO maximum: ISO 25600 (H) is an expanded setting, not a native sensitivity.
  2. 2Canon EOS R6 Mark III, In-body image stabilization: 8.5 stops is Canon's best-case center rating with certain RF lenses; peripheral and other lenses see less, down to 7.5 stops.
  3. 3Canon EOS R100, In-body image stabilization: No in-body stabilization; shake correction relies on IS lenses or Movie Digital IS.
  4. 4Canon EOS R100, Continuous shooting (electronic): The electronic (silent) shutter does not support continuous shooting on this camera.
  5. 5Canon EOS R6 Mark III, Pre-burst capture duration: Works only in the 40 fps electronic-shutter mode; Canon states it as up to 20 frames.
  6. 6Canon EOS R6 Mark III, AF subject detection: Car detection is tuned for racing cars, per Canon.
  7. 7Canon EOS R6 Mark III, Max video resolution: 7K is available only in RAW Video mode; standard MP4 recording tops out at 4K.
  8. 8Canon EOS R6 Mark III, 4K max frame rate (full width): 4K 120p uses the full width but is not oversampled; oversampled 4K tops out at 60p.
  9. 9Canon EOS R100, 4K max frame rate (full width): All 4K recording uses a ~1.6x centre crop, so no full-width 4K mode exists.
  10. 10Canon EOS R6 Mark III, Video dynamic range (log): Canon's claim of 15+ stops in its Canon Log profiles, not a lab measurement.
  11. 11Canon EOS R100, Viewfinder magnification: Canon's 0.95x is quoted with a 50mm lens on APS-C; in 35mm-equivalent terms it is 0.59x.
  12. 12Canon EOS R6 Mark III, Battery life: 620 shots is CIPA's rating using the rear LCD (not the viewfinder) at 23°C; real-world results vary.
  13. 13Canon EOS R100, Weight: CIPA weight: body with battery and memory card, without lens.
  14. 14Canon EOS R6 Mark III, USB charging & power delivery: USB-C charging and power need a capable USB-PD source such as Canon's PD-E2; not every power bank works.
  15. 15Canon EOS R100, USB charging & power delivery: The battery must be charged in the external LC-E17E charger; no USB power delivery.

Image Quality and Sensor

The R6 Mark III features a full-frame sensor paired with 32.5 MP effective pixels, giving it a clear advantage in detail and low-light performance over the APS-C R100. You also get a native maximum ISO of 64,000, which helps in dim settings without needing an expanded setting.

Furthermore, the R6 Mark III includes 8.5 stops of in-body image stabilization. The R100 has 0 stops of in-body shake correction, relying instead on IS lenses or Movie Digital IS.

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Image Quality and Sensor

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Speed and Autofocus

For action and wildlife, the R6 Mark III dominates with a 40 fps electronic continuous shooting mode and advanced subject detection covering animals, vehicles, and more. The R100 tops out at 6.5 fps mechanically and is limited to human subject detection.

The R6 Mark III also offers a mechanical shutter speed of 1/8,000 s and dual memory card slots. The R100 has a single card slot and a slower 1/4,000 s mechanical shutter speed.

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Speed and Autofocus

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Video Performance

Video creators will find vastly superior tools on the R6 Mark III, which records internally in raw video with 10-bit color, log profile support, and 7K maximum resolution. It also supports 4K at 119.9 fps using the full width.

The R100 records video in 4K at 25 fps with an 8-bit H.264 codec and lacks raw internal video. Additionally, all 4K recording on the R100 uses a ~1.6x center crop.

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Video Performance

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Handling and Battery Life

The R6 Mark III is built for heavy-duty use with dust and drip-resistant weather sealing, a fully articulated 1.6 M dot screen, and a 3.69 M dot viewfinder. It delivers 620 shots per battery charge and supports USB-C charging with a capable USB-PD source.

In contrast, the R100 weighs just 356 g, making it far lighter and more compact for travel. It features a fixed 1.04 M dot screen, a 2.36 M dot viewfinder, and provides 430 shots per battery charge.

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Handling and Battery Life

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The Verdict

Buy the R6 Mark III if you need professional video codecs, rapid burst rates, and full-frame low-light capabilities. Buy the R100 if you want an ultra-lightweight, simple camera for basic photography.

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Verdict

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Where to buy

  • Canon EOS R6 Mark III

    Best for Professionals and hybrid shooters needing advanced video and speed

    View on eBay · $2,499.00

  • Canon EOS R100

    Best for Beginners seeking an ultra-light, straightforward RF-mount camera

FAQ

Can I charge the Canon EOS R100 via USB?

No, the battery must be charged in the external LC-E17E charger, as the R100 does not support USB power delivery.

Does the Canon EOS R6 Mark III support headphones?

Yes, the R6 Mark III includes a headphone port, whereas the R100 does not.

What aspect ratios are available on the Canon EOS R100?

The R100 supports 3:2, 4:3, 1:1, and 16:9 aspect ratios.

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FAQ

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