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Canon M100 vs Ricoh GR III

The Canon EOS M100 and the Ricoh GR III are two digital cameras that were officially introduced, respectively, in August 2017 and February 2019. The M100 is a mirrorless interchangeable lens camera, while the GR III is a fixed lens compact. Both cameras are equipped with an APS-C sensor. Both cameras offer a resolution of 24 megapixels.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon M100 versus Ricoh GR III
Canon M100 Ricoh GR III
Mirrorless system camera Fixed lens compact camera
Canon EF-M mount lenses 28mm f/2.8
24 MP, APS-C Sensor 24 MP, APS-C Sensor
1080/60p Video 1080/60p Video
ISO 100-25,600 ISO 100-102,400
No viewfinder, LCD framing Viewfinder optional
3.0 LCD, 1040k dots 3.0 LCD, 1037k dots
Tilting touchscreen Fixed touchscreen
6.1 shutter flaps per second 4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
295 shots per battery charge200 shots per battery charge
108 x 67 x 35 mm, 302 g 109 x 62 x 33 mm, 257 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS M100 and the Ricoh GR III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Canon M100 and the Ricoh GR III. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The M100 can be obtained in two different colors (black, white), while the GR III is only available in black.

Size Canon M100 vs Ricoh GR III
Compare M100 versus GR III top
Comparison M100 or GR III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Ricoh GR III is notably smaller (7 percent) than the Canon M100. In this context, it is worth noting that neither the M100 nor the GR III are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the GR III has a lens built in, whereas the M100 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

The power pack in the GR III can be charged via the USB port, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Canon M100 108 mm 67 mm 35 mm 302 g 295 n Aug 2017 499i
 
Ricoh GR III 109 mm 62 mm 33 mm 257 g 200 n Feb 2019 899 i
 
Canon M200 108 mm 67 mm 35 mm 299 g 315 n Sep 2019 549 i
 
Canon G7 X Mark III 105 mm 61 mm 41 mm 304 g 235 n Jul 2019 749 i
 
Canon 2000D 129 mm 101 mm 78 mm 475 g 500 n Feb 2018 449 i
 
Canon 77D 131 mm 100 mm 76 mm 540 g 600 n Feb 2017 899 i
 
Canon 200D 122 mm 93 mm 70 mm 453 g 650 n Jun 2017 549i
 
Canon G9 X Mark II 98 mm 58 mm 31 mm 206 g 235 n Jan 2017 529 i
 
Canon M6 112 mm 68 mm 45 mm 390 g 295 n Feb 2017 779i
 
Canon M5 116 mm 89 mm 61 mm 427 g 295 n Sep 2016 979 i
 
Canon M3 111 mm 68 mm 44 mm 366 g 250 n Feb 2015 679i
 
Canon M10 108 mm 67 mm 35 mm 301 g 255 n Oct 2015 499i
 
Canon M 109 mm 66 mm 32 mm 298 g 230 n Jul 2012 599i
 
Panasonic TZ200 111 mm 65 mm 45 mm 340 g 370 n Feb 2018 799 i
 
Panasonic TZ100 111 mm 65 mm 44 mm 312 g 300 n Jan 2016 699i
 
Ricoh GR II 117 mm 63 mm 35 mm 251 g 320 n Jun 2015 699 i
 
Sony ZV-1 105 mm 60 mm 44 mm 294 g 260 n May 2020 799 i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

The price is, of course, an important factor in any camera decision. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the GR III is 11 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (M100) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

In terms of underlying technology, both cameras are build around CMOS sensors.

Canon M100 and Ricoh GR III sensor measures

Even though the GR III has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the GR III has a lower pixel density and larger individual pixels (with a pixel pitch of 3.91μm versus 3.72μm for the M100), which gives it a potential advantage in terms of light gathering capacity. In addition, the GR III is a somewhat more recent model (by 1 year and 5 months) than the M100, and its sensor might have benefitted from technological advances during this time. Coming back to sensor resolution, it should be mentioned that the GR III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The Canon EOS M100 has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Ricoh GR III are ISO 100 to ISO 102400 (no boost).

M100 versus GR III MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
 
Canon M100 APS-C 24.0 6000 40001080/60p23.512.9127278
 
Ricoh GR III APS-C 24.0 6000 40001080/60p........
 
Canon M200 APS-C 24.0 6000 40004k/25p........
 
Canon G7 X Mark III 1-inch 20.0 5472 36484K/30p........
 
Canon 2000D APS-C 24.0 6000 40001080/30p22.611.9100971
 
Canon 77D APS-C 24.0 6000 40001080/60p23.613.397178
 
Canon 200D APS-C 24.0 6000 40001080/60p23.613.4104179
 
Canon G9 X Mark II 1-inch 20.0 5472 36481080/60p21.912.552265
 
Canon M6 APS-C 24.0 6000 40001080/60p........
 
Canon M5 APS-C 24.0 6000 40001080/60p23.412.4126277
 
Canon M3 APS-C 24.0 6000 40001080/30p22.811.8116972
 
Canon M10 APS-C 17.9 5184 34561080/30p22.211.475365
 
Canon M APS-C 17.9 5184 34561080/30p22.111.282765
 
Panasonic TZ200 1-inch 20.0 5472 36484K/30p........
 
Panasonic TZ100 1-inch 20.0 5472 36484K/30p22.812.555970
 
Ricoh GR II APS-C 16.1 4928 32641080/30p23.613.7107880
 
Sony ZV-1 1-inch 20.0 5472 36484K/30p........

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (1080/60p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The M100 and the GR III are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. That said, the GR III can be equipped with an optional viewfinder – the GV-1. The table below summarizes some of the other core capabilities of the Canon M100 and Ricoh GR III in connection with corresponding information for a sample of similar cameras.

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Core Features
  Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
 
Canon M100none n 3.0 1040 tilting Y 1/4000s 6.1 Y n
 
Ricoh GR IIIoptional n 3.0 1037 fixed Y 1/4000s 4.0 n Y
 
Canon M200none n 3.0 1040 tilting Y 1/4000s 6.1 Y n
 
Canon G7 X Mark IIInone n 3.0 1040 tilting Y 1/2000s 30 Y Y
 
Canon 2000Doptical n 3.0 920 fixed n 1/4000s 3.0 Y n
 
Canon 77Doptical Y 3.0 1040 swivel Y 1/4000s 6.0 Y n
 
Canon 200Doptical n 3.0 1040 swivel Y 1/4000s 5.0 Y n
 
Canon G9 X Mark IInone n 3.0 1040 fixed Y 1/2000s 8.2 Y Y
 
Canon M6optional n 3.0 1040 tilting Y 1/4000s 9.0 Y n
 
Canon M52360 n 3.2 1620 tilting Y 1/4000s 9.0 Y n
 
Canon M3optional n 3.0 1040 tilting Y 1/4000s 4.2 Y n
 
Canon M10none n 3.0 1040 tilting Y 1/4000s 4.6 Y n
 
Canon Mnone n 3.0 1040 fixed Y 1/4000s 4.3 n n
 
Panasonic TZ2002330 n 3.0 1240 fixed Y 1/2000s 10.0 Y Y
 
Panasonic TZ1001166 n 3.0 1040 fixed Y 1/2000s 10.0 Y Y
 
Ricoh GR IIoptional n 3.0 1230 fixed n 1/4000s 4.0 Y n
 
Sony ZV-1none n 3.0 922 swivel Y 1/2000s 24.0 n Y

One difference between the cameras concerns the presence of an on-board flash. The M100 has one, while the GR III does not. While the built-in flash of the M100 is not very powerful, it can at times be useful as a fill-in light.

The M100 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the GR III does not have a selfie-screen.

The Ricoh GR III has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

Concerning the storage of imaging data, both the M100 and the GR III write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.

Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon EOS M100 and Ricoh GR III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
 
Canon M100-stereomono--mini2.0YYY
 
Ricoh GR IIIYstereomono---3.0Y-Y
 
Canon M200-stereomono--micro2.0Y-Y
 
Canon G7 X Mark III-stereomonoY-micro3.1Y-Y
 
Canon 2000DYmonomono--mini2.0YY-
 
Canon 77DYstereomonoY-mini2.0YYY
 
Canon 200DYstereomonoY-mini2.0YYY
 
Canon G9 X Mark II-stereomono--micro2.0YYY
 
Canon M6YstereomonoY-mini2.0YYY
 
Canon M5YstereomonoY-mini2.0YYY
 
Canon M3YstereomonoY-mini2.0YY-
 
Canon M10-stereomono--mini2.0YY-
 
Canon MYstereomonoY-mini2.0---
 
Panasonic TZ200-stereomono--micro2.0Y-Y
 
Panasonic TZ100-stereomono--micro2.0Y--
 
Ricoh GR IIYstereomono--micro2.0YY-
 
Sony ZV-1YstereomonoY-micro2.0YYY

It is notable that the GR III has a hotshoe, which makes it possible to easily attach optional accessories, such as an external flash gun. The M100 does not feature such an accessory-socket.

The GR III is a recent model that features in the current product line-up of Ricoh. In contrast, the M100 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the M100 was succeeded by the Canon M200. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Ricoh websites.

Review summary

So what conclusions can be drawn? Is the Canon M100 better than the Ricoh GR III or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Canon EOS M100:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (6.1 vs 4 flaps/sec) to capture the decisive moment.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Longer lasting: Can take more shots (295 versus 200) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More heavily discounted: Has been on the market for longer (launched in August 2017).

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Reasons to prefer the Ricoh GR III:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • More framing options: Can be equipped with a hotshoe-mounted accessory-viewfinder.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Ready to shoot: Has an integrated lens, whereas the M100 necessitates an extra lens.
  • Less heavy: Has a lower weight even though it has a lens built in (unlike the M100).
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • More modern: Was introduced somewhat (1 year and 5 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (9 points each). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

M100 09:09 GR III

How about other alternatives? Do the specifications of the Canon M100 and the Ricoh GR III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Prime Lens Compact Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the M100 or the GR III perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Canon M100+..4/5..3.5/5 Aug 2017 499i
 
Ricoh GR III..81/1004/5.... Feb 2019 899 i
 
Canon M200+79/1004/5..4/5 Sep 2019 549 i
 
Canon G7 X Mark III+ +81/1004/5.... Jul 2019 749 i
 
Canon 2000Do..3.5/5..3.5/5 Feb 2018 449 i
 
Canon 77D..82/1004.5/54.5/54/5 Feb 2017 899 i
 
Canon 200D+ +78/1004.5/54.5/54.5/5 Jun 2017 549i
 
Canon G9 X Mark II..75/1004.5/54.5/54.5/5 Jan 2017 529 i
 
Canon M6..80/1004/54.5/54/5 Feb 2017 779i
 
Canon M5+82/1004/54.5/54/5 Sep 2016 979 i
 
Canon M3o75/1004.5/54.5/54/5 Feb 2015 679i
 
Canon M10......o4/5 Oct 2015 499i
 
Canon M+..4/53.5/54/5 Jul 2012 599i
 
Panasonic TZ200+ +81/1004.5/5..4.5/5 Feb 2018 799 i
 
Panasonic TZ100+ +82/1004.5/54/54.5/5 Jan 2016 699i
 
Ricoh GR II....4.5/54.5/54.5/5 Jun 2015 699 i
 
Sony ZV-1........4.5/5 May 2020 799 i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Canon M100:
Check Ebay offers
Ricoh GR III:
Check Amazon price

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Canon M100 vs Ricoh GR III

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Canon M100 Ricoh GR III
    Camera Type Mirrorless system camera Fixed lens compact camera
    Camera Lens Canon EF-M mount lenses 28mm f/2.8
    Launch Date August 2017 February 2019
    Launch Price USD 499 USD 899
    Sensor Specs Canon M100 Ricoh GR III
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor APS-C Sensor
    Sensor Size 22.3 x 14.9 mm 23.5 x 15.6 mm
    Sensor Area 332.27 mm2 366.6 mm2
    Sensor Diagonal 26.8 mm 28.2 mm
    Crop Factor 1.6x 1.5x
    Sensor Resolution 24 Megapixels 24 Megapixels
    Image Resolution 6000 x 4000 pixels 6000 x 4000 pixels
    Pixel Pitch 3.72 μm 3.91 μm
    Pixel Density 7.22 MP/cm2 6.55 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60p Video 1080/60p Video
    ISO Setting 100 - 25,600 ISO 100 - 102,400 ISO
    Image Processor DIGIC 7 GR Engine VI
    DXO Sensor Quality (score) 78 ..
    DXO Color Depth (bits) 23.5 ..
    DXO Dynamic Range (EV) 12.9 ..
    DXO Low Light (ISO) 1272 ..
    Screen Specs Canon M100 Ricoh GR III
    Viewfinder Type no viewfinder Viewfinder optional
    Viewfinder Magnification
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1040k dots 1037k dots
    LCD Attachment Tilting screen Fixed screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Canon M100 Ricoh GR III
    Focus System On-Sensor Phase-detect On-Sensor Phase-detect
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 6.1 shutter flaps/s 4 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Single card slot Single card slot
    UHS card support UHS-I UHS-I
    Connectivity Specs Canon M100 Ricoh GR III
    External Flash no Hotshoe Hotshoe
    USB Connector USB 2.0 USB 3.0
    HDMI Port mini HDMI no HDMI
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in no NFC
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs Canon M100 Ricoh GR III
    Battery Type LP-E12 DB-110
    Battery Life (CIPA)295 shots per charge200 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 108 x 67 x 35 mm
    (4.3 x 2.6 x 1.4 in)
    109 x 62 x 33 mm
    (4.3 x 2.4 x 1.3 in)
    Camera Weight 302 g (10.7 oz) 257 g (9.1 oz)

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