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Canon G7 X Mark III vs Olympus E-520

The Canon PowerShot G7 X Mark III and the Olympus E-520 are two digital cameras that were announced, respectively, in July 2019 and May 2008. The G7X Mark III is a fixed lens compact, while the E-520 is a DSLR. The cameras are based on an one-inch (G7X Mark III) and a Four Thirds (E-520) sensor. The Canon has a resolution of 20 megapixels, whereas the Olympus provides 10 MP.

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

Headline Specifications
Canon G7 X Mark III
versus
Olympus E-520
Canon G7 X Mark III   Olympus E-520
Fixed lens compact camera Digital single lens reflex
24-100mm f/1.8-2.8 Four Thirds lenses
20 MP – 1" sensor 10 MP – Four Thirds sensor
4K/30p Video no Video
ISO 125-12,800 (125 - 25,600) ISO 100-1,600
No viewfinder, LCD framing Optical viewfinder
3.0" LCD – 1040k dots 2.7" LCD – 215k dots
Tilting touchscreen Fixed screen (not touch-sensitive)
30 shutter flaps per second 3.5 shutter flaps per second
Lens-based stabilizationIn-body stabilization
235 shots per battery charge750 shots per battery charge
105 x 61 x 41 mm, 304 g 136 x 92 x 68 mm, 535 g
logo
Check G7X Mark III price at
amazon.com
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Check E-520 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G7 X Mark III and the Olympus E-520? 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.

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Body comparison

The physical size and weight of the Canon G7 X Mark III and the Olympus E-520 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The G7X Mark III can be obtained in two different colors (black, silver), while the E-520 is only available in black.

Size Canon G7 X Mark III vs Olympus E-520
Compare G7X Mark III versus E-520 top
Comparison G7X Mark III or E-520 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-520 is considerably larger (95 percent) than the Canon G7 X Mark III. In this context, it is worth noting that neither the G7X Mark III nor the E-520 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X Mark III has a lens built in, whereas the E-520 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the E-520 and their specifications in the Four Thirds Lens Catalog.

Concerning battery life, the G7X Mark III gets 235 shots out of its Canon NB-13L battery, while the E-520 can take 750 images on a single charge of its Olympus BLM-1 power pack. The power pack in the G7X Mark III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Canon G7 X Mark III 105 mm 61 mm 41 mm 304 g 235 i Jul 2019 US$ 749 amazon.com
2.
 
Olympus E-520 136 mm 92 mm 68 mm 535 g 750 i May 2008 US$ 699ebay.com
3.
 
Canon G5 X 112 mm 76 mm 44 mm 353 g 210 i Oct 2015 US$ 799ebay.com
4.
 
Canon G5 X Mark II 111 mm 61 mm 46 mm 340 g 230 i Jul 2019 US$ 899ebay.com
5.
 
Canon G7 X 103 mm 60 mm 40 mm 304 g 210 i Sep 2014 US$ 699ebay.com
6.
 
Canon G7 X Mark II 106 mm 61 mm 42 mm 319 g 265 i Feb 2016 US$ 699ebay.com
7.
 
Canon SX740 110 mm 64 mm 40 mm 299 g 265 i Jul 2018 US$ 399 amazon.com
8.
 
Leica C-LUX 113 mm 67 mm 46 mm 340 g 370 i Jun 2018 US$ 1 049ebay.com
9.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 i Mar 2007 US$ 699ebay.com
10.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 i Mar 2008 US$ 599ebay.com
11.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 i Mar 2007 US$ 799ebay.com
12.
 
Olympus E-600 130 mm 94 mm 60 mm 535 g 500 i Aug 2009 US$ 449ebay.com
13.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 i Feb 2009 US$ 699ebay.com
14.
 
Panasonic FZ1000 II 136 mm 97 mm 131 mm 810 g 350 i Feb 2019 US$ 899 amazon.com
15.
 
Panasonic ZS200 111 mm 65 mm 45 mm 340 g 370 i Feb 2018 US$ 799 amazon.com
16.
 
Sony RX100 VI 102 mm 58 mm 43 mm 301 g 240 i Jun 2018 US$ 1 199ebay.com
17.
 
Sony ZV-1 105 mm 60 mm 44 mm 294 g 260 i May 2020 US$ 799ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
  empty Camera
Model

Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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 size of the imaging sensor is a crucial determinant 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon G7 X Mark III features an one-inch sensor and the Olympus E-520 a Four Thirds sensor. The sensor area in the E-520 is 94 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 2.0. The sensor in the G7X Mark III has a native 3:2 aspect ratio, while the one in the E-520 offers a 4:3 aspect.

Canon G7 X Mark III and Olympus E-520 sensor measures

Despite having a smaller sensor, the Canon G7 X Mark III offers a higher resolution of 20 megapixels, compared with 10 MP of the Olympus E-520. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 4.74μm for the E-520). However, it should be noted that the G7X Mark III is much more recent (by 11 years and 1 month) than the E-520, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The resolution advantage of the Canon G7 X Mark III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G7X Mark III for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the Olympus E-520 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.

The Canon PowerShot G7 X Mark III has a native sensitivity range from ISO 125 to ISO 12800, which can be extended to ISO 125-25600. The corresponding ISO settings for the Olympus E-520 are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the G7X Mark III is build around a BSI-CMOS sensor, while the E-520 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

G7X Mark III versus E-520 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). 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
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon G7 X Mark III 1-inch 20.0 5472 36484K/30p22.212.458365
2.
 
Olympus E-520 Four Thirds 10.0 3648 2736i21.410.454855
3.
 
Canon G5 X 1-inch 20.0 5472 36481080/60p21.412.347162
4.
 
Canon G5 X Mark II 1-inch 20.0 5472 36484K/30p22.212.458365
5.
 
Canon G7 X 1-inch 20.0 5472 36481080/60p23.012.755671
6.
 
Canon G7 X Mark II 1-inch 20.0 5472 36481080/60p21.811.926062
7.
 
Canon SX740 1/2.3 20.2 5184 38884K/30p20.612.1105051
8.
 
Leica C-LUX 1-inch 20.0 5472 36484K/30p22.112.348164
9.
 
Olympus E-410 Four Thirds 10.0 3648 2736i21.110.049451
10.
 
Olympus E-420 Four Thirds 10.0 3648 2736i21.510.452756
11.
 
Olympus E-510 Four Thirds 10.0 3648 2736i21.210.044252
12.
 
Olympus E-600 Four Thirds 12.2 4032 3024i21.510.354155
13.
 
Olympus E-620 Four Thirds 12.2 4032 3024i21.310.353655
14.
 
Panasonic FZ1000 II 1-inch 20.0 5472 36484K/30p22.112.454665
15.
 
Panasonic ZS200 1-inch 20.0 5472 36484K/30p22.012.244964
16.
 
Sony RX100 VI 1-inch 20.0 5472 36484K/30p22.112.347864
17.
 
Sony ZV-1 1-inch 20.0 5472 36484K/30p22.212.666966
Note: DXO values in italics represent estimates based on sensor size and age.
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
  empty Camera
Model

Many modern cameras cannot only take still pictures, but also record videos. The G7X Mark III indeed provides movie recording capabilities, while the E-520 does not. The highest resolution format that the G7X Mark III can use is 4K/30p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-520 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G7X Mark III relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon G7 X Mark III and Olympus E-520 in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon G7 X Mark IIIi i3.0 / 1040 tilting i 1/2000s 30/s i i
2.
 
Olympus E-520optical i2.7 / 215 fixed i 1/4000s 3.5/s i i
3.
 
Canon G5 X2360 i3.0 / 1040 swivel i 1/2000s 5.9/s i i
4.
 
Canon G5 X Mark II2360 i3.0 / 1040 tilting i 1/2000s 30/s i i
5.
 
Canon G7 Xi i3.0 / 1040 tilting i 1/2000s 6.5/s i i
6.
 
Canon G7 X Mark IIi i3.0 / 1040 tilting i 1/2000s 8.0/s i i
7.
 
Canon SX740i i3.0 / 922 tilting i 1/3200s 10.0/s i i
8.
 
Leica C-LUX2330 i3.0 / 1240 fixed i 1/2000s 10.0/s i i
9.
 
Olympus E-410optical i2.5 / 215 fixed i 1/4000s 3.0/s i i
10.
 
Olympus E-420optical i2.7 / 215 fixed i 1/4000s 3.5/s i i
11.
 
Olympus E-510optical i2.5 / 215 fixed i 1/4000s 3.0/s i i
12.
 
Olympus E-600optical i2.7 / 230 swivel i 1/4000s 4.0/s i i
13.
 
Olympus E-620optical i2.7 / 230 swivel i 1/4000s 4.0/s i i
14.
 
Panasonic FZ1000 II2360 i3.0 / 1240 swivel i 1/4000s 12.0/s i i
15.
 
Panasonic ZS2002330 i3.0 / 1240 fixed i 1/2000s 10.0/s i i
16.
 
Sony RX100 VI2359 i3.0 / 1229 tilting i 1/2000s 24.0/s i i
17.
 
Sony ZV-1i i3.0 / 922 swivel i 1/2000s 24.0/s i i
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
  empty Camera
Model

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G7X Mark III has a touchscreen, while the E-520 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The G7X Mark III 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 E-520 does not have a selfie-screen.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the G7X Mark III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Canon G7 X Mark 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.

The G7X Mark III writes its imaging data to SDXC cards, while the E-520 uses Compact Flash or xD Picture cards. The E-520 features dual card slots, which can be very useful in case a memory card fails. In contrast, the G7X Mark III only has one slot.

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 PowerShot G7 X Mark III and Olympus E-520 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon G7 X Mark IIIistereo / monoiimicro3.1iii
2.
 
Olympus E-520ii / iiii2.0iii
3.
 
Canon G5 Xistereo / monoiimini2.0iii
4.
 
Canon G5 X Mark IIistereo / monoiimicro3.1iii
5.
 
Canon G7 Xistereo / monoiimicro2.0iii
6.
 
Canon G7 X Mark IIistereo / monoiimicro2.0iii
7.
 
Canon SX740istereo / monoiimicro2.0iii
8.
 
Leica C-LUXistereo / monoiimicro2.0iii
9.
 
Olympus E-410ii / iiii2.0iii
10.
 
Olympus E-420ii / iiii2.0iii
11.
 
Olympus E-510ii / iiii2.0iii
12.
 
Olympus E-600ii / iiii2.0iii
13.
 
Olympus E-620ii / iiii2.0iii
14.
 
Panasonic FZ1000 IIistereo / monoiimicro2.0iii
15.
 
Panasonic ZS200istereo / monoiimicro2.0iii
16.
 
Sony RX100 VIistereo / monoiimicro2.0iii
17.
 
Sony ZV-1istereo / monoiimicro2.0iii
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
  empty Camera
Model

It is notable that the G7X Mark III offers wifi support, while the E-520 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

The G7X Mark III is a recent model that features in the current product line-up of Canon. In contrast, the E-520 has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the E-520 from Olympus. Further information on the features and operation of the G7X Mark III and E-520 can be found, respectively, in the Canon G7 X Mark III Manual (free pdf) or the online Olympus E-520 Manual.

Review summary

So what is the bottom line? Is there a clear favorite between the Canon G7 X Mark III and the Olympus E-520? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Canon PowerShot G7 X Mark III:

  • More detail: Offers more megapixels (20 vs 10MP) with a 44% higher linear resolution.
  • Broader imaging potential: Can record not only still images but also 4K/30p movies.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 215k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (30 vs 3.5 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Ready to shoot: Comes with a built-in lens, while the E-520 requires a separate lens.
  • More compact: Is smaller (105x61mm vs 136x92mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a built-in lens (unlike the E-520).
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More modern: Reflects 11 years and 1 month of technical progress since the E-520 launch.

ilogo

Reasons to prefer the Olympus E-520:

  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
  • More flexible: Makes it possible to change lenses and thus to use specialty optics.
  • Longer lasting: Gets more shots (750 versus 235) out of a single battery charge.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been around for much longer (launched in May 2008).

If the count of relative strengths (bullet points above) is taken as a measure, the G7X Mark III is the clear winner of the match-up (18 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

G7X Mark III 18:07 E-520

How about other alternatives? Do the specifications of the Canon G7 X Mark III and the Olympus E-520 place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the G7X Mark III or the E-520 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Canon G7 X Mark III..+ +4/581/1004/5.. Jul 2019 US$ 749 amazon.com
2.
 
Olympus E-520..87/100..+ +4.5/54.5/5 May 2008 US$ 699ebay.com
3.
 
Canon G5 X5/5+ +..78/1004.5/54.5/5 Oct 2015 US$ 799ebay.com
4.
 
Canon G5 X Mark II4/5+4/582/100..4/5 Jul 2019 US$ 899ebay.com
5.
 
Canon G7 X4/5+ +..77/1004.5/54.5/5 Sep 2014 US$ 699ebay.com
6.
 
Canon G7 X Mark II4.5/5+ +..81/1004.5/54.5/5 Feb 2016 US$ 699ebay.com
7.
 
Canon SX740..+3.5/5..4/54/5 Jul 2018 US$ 399 amazon.com
8.
 
Leica C-LUX....3.5/5..4.5/54/5 Jun 2018 US$ 1 049ebay.com
9.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 US$ 699ebay.com
10.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 US$ 599ebay.com
11.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 US$ 799ebay.com
12.
 
Olympus E-600..........4.5/5 Aug 2009 US$ 449ebay.com
13.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 US$ 699ebay.com
14.
 
Panasonic FZ1000 II......83/1004.5/54.5/5 Feb 2019 US$ 899 amazon.com
15.
 
Panasonic ZS200..+ +4.5/581/1004.5/54.5/5 Feb 2018 US$ 799 amazon.com
16.
 
Sony RX100 VI4.5/5+ +..83/1004/54.5/5 Jun 2018 US$ 1 199ebay.com
17.
 
Sony ZV-14/5+4/585/1004/54.5/5 May 2020 US$ 799ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
  empty  Camera 
 Model 

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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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 make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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  • Canon SX1
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  • Fujifilm X70
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  • Fujifilm X100T
  • Fujifilm X100F
  • Fujifilm X100V
  • Fujifilm X100VI
  • Fujifilm XF10
  • Fujifilm XQ1
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  • Fujifilm XP120
  • Fujifilm XP130
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  • Hasselblad X1D
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  • Kodak AZ901
  • Kodak S-1
  • Leica C-LUX
  • Leica CL
  • Leica D-LUX Typ 109
  • Leica D-LUX 5
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  • Leica Digilux 3
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  • Leica T
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  • Leica V-LUX Typ 114
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  • Leica X1
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  • Leica X Vario
  • Leica X Typ 113
  • Leica X-U Typ 113
  • Leitz Ur-Leica
  • Nikon 1 J4
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  • Nikon 1 V1
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  • Nikon Coolpix A
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  • Nikon D1
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  • Olympus E-500
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  • Olympus E-M10
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  • Olympus Stylus 1
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  • OM System OM-1
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  • Panasonic FZ80
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  • Panasonic S9
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  • Pentax 645D
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  • Pentax KP
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  • Pentax MX-1
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  • Ricoh GR
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  • Ricoh WG-6
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  • Samsung NX1
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  • Sigma fp
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  • Sony A7
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  • Sony A7C R
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  • Sony A9
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  • Sony A58
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  • Sony A850
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  • YI M1
  • Zeiss ZX1
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Specifications: Canon G7 X Mark III vs Olympus E-520

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 G7 X Mark III Olympus E-520
Camera Type Fixed lens compact camera Digital single lens reflex
Camera Lens 24-100mm f/1.8-2.8 Four Thirds lenses
Launch Date July 2019 May 2008
Launch Price USD 749 USD 699
Sensor Specs Canon G7 X Mark III Olympus E-520
Sensor Technology BSI-CMOS CMOS
Sensor Format 1" Sensor Four Thirds Sensor
Sensor Size 13.2 x 8.8 mm 17.3 x 13.0 mm
Sensor Area 116.16 mm2 224.9 mm2
Sensor Diagonal 15.9 mm 21.6 mm
Crop Factor 2.7x 2.0x
Sensor Resolution 20 Megapixels 10 Megapixels
Image Resolution 5472 x 3648 pixels 3648 x 2736 pixels
Pixel Pitch 2.41 μm 4.74 μm
Pixel Density 17.18 MP/cm2 4.44 MP/cm2
Moiré control Anti-Alias filter Anti-Alias filter
Movie Capability 4K/30p Video no Video
ISO Setting 125 - 12,800 ISO 100 - 1,600 ISO
ISO Boost 125 - 25,600 ISO no Enhancement
Image Processor DIGIC 8 TruePic III
DXO Sensor Quality (score) .. 55
DXO Color Depth (bits) .. 21.4
DXO Dynamic Range (EV) .. 10.4
DXO Low Light (ISO) .. 548
Screen Specs Canon G7 X Mark III Olympus E-520
Viewfinder Type no viewfinder Optical viewfinder
Viewfinder Field of View 95%
Viewfinder Magnification 0.46x
LCD Framing Live View Live View
Rear LCD Size 3.0inch 2.7inch
LCD Resolution 1040k dots 215k dots
LCD Attachment Tilting screen Fixed screen
Touch Input Touchscreen no Touchscreen
Shooting Specs Canon G7 X Mark III Olympus E-520
Focus System Contrast-detect AF Phase-detect AF
Manual Focusing AidFocus Peakingno Peaking Feature
Continuous Shooting 30 shutter flaps/s 3.5 shutter flaps/s
Electronic Shutterup to 1/25600sno E-Shutter
Time-Lapse PhotographyIntervalometer built-inno Intervalometer
Image StabilizationLens-based stabilizationIn-body stabilization
Fill Flash Built-in Flash Built-in Flash
Storage Medium SDXC cards CF or XD cards
Single or Dual Card Slots Single card slot Dual card slots
Connectivity Specs Canon G7 X Mark III Olympus E-520
External Flash no Hotshoe Hotshoe
USB Connector USB 3.1 USB 2.0
HDMI Port micro HDMI no HDMI
Microphone Port External MIC port no MIC socket
Wifi Support Wifi built-in no Wifi
Bluetooth Support Bluetooth built-in no Bluetooth
Body Specs Canon G7 X Mark III Olympus E-520
Battery Type Canon NB-13L Olympus BLM-1
Battery Life (CIPA)235 shots per charge750 shots per charge
In-Camera Charging USB charging no USB charging
Body Dimensions 105 x 61 x 41 mm
(4.1 x 2.4 x 1.6 in)
136 x 92 x 68 mm
(5.4 x 3.6 x 2.7 in)
Camera Weight 304 g (10.7 oz) 535 g (18.9 oz)
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