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Canon 20D vs G7X Mark II

The Canon EOS 20D and the Canon PowerShot G7 X Mark II are two digital cameras that were officially introduced, respectively, in August 2004 and February 2016. The 20D is a DSLR, while the G7X Mark II is a fixed lens compact. The cameras are based on an APS-C (20D) and an one-inch (G7X Mark II) sensor. The 20D has a resolution of 8.2 megapixels, whereas the G7X Mark II provides 20 MP. Read on to find out how these two cameras compare with respect to their body size, their sensors, their features, their input-output connections, and their reception by expert reviewers.

Headline Specifications
Canon 20D   Canon G7 X Mark II
Canon 20D Canon G7 X Mark II
Digital single lens reflex Fixed lens compact camera
Canon EF mount lenses 24-100mm f/1.8-2.8
8.2 MP, APS-C Sensor 20 MP, 1" Sensor
no Video 1080/60p Video
ISO 100-1600 (100-3200) ISO 125-12800 (125-25600)
Optical viewfinder No viewfinder, LCD framing
1.8" LCD, 118k dots 3.0" LCD, 1040k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
5 shutter flaps per second 8 shutter flaps per second
700 shots per battery charge265 shots per battery charge
144 x 106 x 72 mm, 770 g 106 x 61 x 42 mm, 319 g

Body comparison: Canon 20D vs G7X Mark II

The physical size and weight of the Canon 20D and the Canon G7 X Mark II are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.

Compare Canon 20D and Canon G7 X Mark II
Compare 20D versus G7X Mark II top
Compare 20D or G7X Mark II rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon G7 X Mark II is considerably smaller (58 percent) than the Canon 20D. In this context, it is worth noting that neither the 20D nor the G7X Mark II are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the G7X Mark II has a lens built in, whereas the 20D 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 20D and their specifications in the Canon EF Lens Catalog.

Concerning battery life, the 20D gets 700 shots out of its BP-511A battery, while the G7X Mark II can take 265 images on a single charge of its NB-13L power pack. The power pack in the G7X Mark II can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon 20D» 144 mm 106 mm 72 mm 770 g 700 n Aug 2004 1,499- i Canon 20D
Canon G7 X Mark II« 106 mm 61 mm 42 mm 319 g 265 n Feb 2016 699 i i Canon G7 X Mark II
Canon M100« » 108 mm 67 mm 35 mm 302 g 295 n Aug 2017 499 i i Canon M100
Canon SX730« » 110 mm 64 mm 40 mm 300 g 250 n Apr 2017 399- i Canon SX730
Canon G5 X« » 112 mm 76 mm 44 mm 353 g 210 n Oct 2015 799 i i Canon G5 X
Canon M3« » 111 mm 68 mm 44 mm 366 g 250 n Feb 2015 679- i Canon M3
Canon 7D II« » 149 mm 112 mm 78 mm 910 g 670 Y Sep 2014 1,799 i i Canon 7D II
Canon G7 X« » 103 mm 60 mm 40 mm 304 g 210 n Sep 2014 699- i Canon G7 X
Canon 60D« » 145 mm 106 mm 79 mm 755 g 1100 Y Aug 2010 1,399- i Canon 60D
Canon 7D« » 148 mm 111 mm 74 mm 860 g 800 Y Sep 2009 1,699- i Canon 7D
Canon 50D« » 146 mm 108 mm 74 mm 822 g 800 Y Aug 2008 1,299- i Canon 50D
Canon 40D« » 146 mm 108 mm 74 mm 822 g 750 n Aug 2007 1,299- i Canon 40D
Canon 30D« » 144 mm 106 mm 74 mm 785 g 750 n Feb 2006 1,399- i Canon 30D
Canon 350D« » 127 mm 94 mm 64 mm 540 g 400 n Feb 2005 899- i Canon 350D
Canon 10D« » 150 mm 107 mm 75 mm 850 g 500 n Feb 2003 1,999- i Canon 10D
Canon 300D« » 142 mm 99 mm 72 mm 649 g 400 n Aug 2003 899- i Canon 300D
Nikon D200« » 147 mm 113 mm 74 mm 920 g 400 Y Nov 2005 1,699- i Nikon D200

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. The G7X Mark II was launched at a lower price than the 20D, despite having a lens built in. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

 

Sensor comparison: Canon 20D vs G7X Mark II

The size of the imaging sensor is a crucial determinant of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the 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 20D features an APS-C sensor and the Canon G7 X Mark II an one-inch sensor. The sensor area in the G7X Mark II is 66 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Technology-wise, the G7X Mark II uses a more advanced image processing engine (DIGIC 7) than the 20D (DIGIC 2), with benefits for noise reduction, color accuracy, and processing speed.

Canon 20D and Canon G7 X Mark II sensor measures

Despite having a smaller sensor, the G7X Mark II offers a higher resolution of 20 megapixels, compared with 8.2 MP of the 20D. 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 6.42μm for the 20D). However, it should be noted that the G7X Mark II is much more recent (by 11 years and 6 months) than the 20D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The Canon EOS 20D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Canon PowerShot G7 X Mark II are ISO 125 to ISO 12800, with the possibility to increase the ISO range to 125-25600..

20D versus G7X Mark II MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Canon 20D» APS-C 8.2 3504 2336-21.911.072162Canon 20D
Canon G7 X Mark II« 1-inch 20.0 5472 36481080/60p----Canon G7 X Mark II
Canon M100« » APS-C 24.0 6000 40001080/60p23.512.9127278Canon M100
Canon SX730« » 1/2.3 20.2 5184 38881080/60p----Canon SX730
Canon G5 X« » 1-inch 20.0 5472 36481080/60p----Canon G5 X
Canon M3« » APS-C 24.0 6000 40001080/30p22.811.8116972Canon M3
Canon 7D II« » APS-C 20.0 5472 36481080/60p22.411.8108270Canon 7D II
Canon G7 X« » 1-inch 20.0 5472 36481080/60p23.012.755671Canon G7 X
Canon 60D« » APS-C 17.9 5184 34561080/30p22.211.581366Canon 60D
Canon 7D« » APS-C 17.9 5184 34561080/30p22.011.785466Canon 7D
Canon 50D« » APS-C 15.1 4752 3168-21.811.469663Canon 50D
Canon 40D« » APS-C 10.1 3888 2592-22.111.370364Canon 40D
Canon 30D« » APS-C 8.2 3504 2336-21.510.873659Canon 30D
Canon 350D« » APS-C 8.0 3456 2304-21.810.863760Canon 350D
Canon 10D« » APS-C 6.3 3072 2048-21.110.957157Canon 10D
Canon 300D« » APS-C 6.3 3072 2048-21.010.854455Canon 300D
Nikon D200« » APS-C 10.0 3872 2592-22.311.558364Nikon D200

Many modern cameras cannot only take still pictures, but also record videos. The G7X Mark II indeed provides for movie recording, while the 20D does not. The highest resolution format that the G7X Mark II can use is 1080/60p.

 

Feature comparison: Canon 20D vs G7X Mark II

Beyond body and sensor, cameras can and do differ across a range of features. For example, the 20D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the G7X Mark II relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Canon 20D, the Canon G7 X Mark II, and comparable cameras.

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)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
Canon 20D»optical Y 1.8 118 fixed n 8000 5.0 Y n Canon 20D
Canon G7 X Mark II«- n 3.0 1040 tilting Y 2000 8.0 Y Y Canon G7 X Mark II
Canon M100« »- n 3.0 1040 tilting Y 4000 6.1 Y n Canon M100
Canon SX730« »- n 3.0 922 tilting n 3200 5.9 Y Y Canon SX730
Canon G5 X« »2360 n 3.0 1040 swivel Y 2000 5.9 Y Y Canon G5 X
Canon M3« »- n 3.0 1040 tilting Y 4000 4.2 Y n Canon M3
Canon 7D II« »optical Y 3.0 1040 fixed n 8000 10.0 Y n Canon 7D II
Canon G7 X« »- n 3.0 1040 tilting Y 2000 6.5 Y Y Canon G7 X
Canon 60D« »optical Y 3.0 1040 swivel n 8000 5.3 Y n Canon 60D
Canon 7D« »optical Y 3.0 920 fixed n 8000 8.0 Y n Canon 7D
Canon 50D« »optical Y 3.0 920 fixed n 8000 6.3 Y n Canon 50D
Canon 40D« »optical Y 3.0 230 fixed n 8000 6.5 Y n Canon 40D
Canon 30D« »optical Y 2.5 230 fixed n 8000 5.0 Y n Canon 30D
Canon 350D« »optical n 1.8 115 fixed n 4000 3.0 Y n Canon 350D
Canon 10D« »optical Y 1.8 118 fixed n 4000 3.0 Y n Canon 10D
Canon 300D« »optical n 1.8 118 fixed n 4000 2.5 Y n Canon 300D
Nikon D200« »optical Y 2.5 230 fixed n 8000 5.0 Y n Nikon D200

One feature that is present on the 20D, but is missing on the G7X Mark II is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

The G7X Mark II has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 20D does not have a selfie-screen.

The 20D writes its imaging data to Compact Flash cards, while the G7X Mark II uses SDXC cards.

 

Connectivity comparison: Canon 20D vs G7X Mark II

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 20D and Canon PowerShot G7 X Mark II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Canon 20D»Y-----1.1---Canon 20D
Canon G7 X Mark II«-stereomono--micro2.0YY-Canon G7 X Mark II
Canon M100« »-stereomono--mini2.0YYYCanon M100
Canon SX730« »-stereomono--micro2.0YYYCanon SX730
Canon G5 X« »Ystereomono--mini2.0YY-Canon G5 X
Canon M3« »YstereomonoY-mini2.0YY-Canon M3
Canon 7D II« »YstereomonoYYmini3.0---Canon 7D II
Canon G7 X« »-stereomono--micro2.0YY-Canon G7 X
Canon 60D« »YmonomonoY-mini2.0---Canon 60D
Canon 7D« »Ymono-Y-mini2.0---Canon 7D
Canon 50D« »Y----mini2.0---Canon 50D
Canon 40D« »Y-----2.0---Canon 40D
Canon 30D« »Y-----2.0---Canon 30D
Canon 350D« »Y-----2.0---Canon 350D
Canon 10D« »Y-----1.1---Canon 10D
Canon 300D« »Y-----1.1---Canon 300D
Nikon D200« »Y-----2.0---Nikon D200

It is notable that the 20D has a hotshoe, while the G7X Mark II does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Studio photographers will appreciate that the Canon 20D (unlike the G7X Mark II) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The G7X Mark II is a recent model that features in the current product line-up of Canon. In contrast, the 20D has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 20D was succeeded by the Canon 30D.


Review summary: Canon 20D vs G7X Mark II

So what is the bottom line? Is the Canon 20D better than the Canon G7 X Mark II or vice versa? The listing below highlights the relative strengths of the two models.


Arguments in favor of the Canon EOS 20D:

  • Easier framing: Has an optical viewfinder for image framing and settings control.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 2000/sec) to freeze action.
  • More flexible: Can take a variety of interchangeable lenses, including specialty optics.
  • Longer lasting: Can take more shots (700 versus 265) on a single battery charge.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been available for much longer (launched in August 2004).


Reasons to prefer the Canon PowerShot G7 X Mark II:

  • More detail: Has more megapixels (20 vs 8.2MP), which boosts linear resolution by 56%.
  • Better jpgs: Has a more modern image processing engine (DIGIC 7 vs DIGIC 2).
  • Broader imaging potential: Can capture not only stills but also 1080/60p video.
  • Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 118k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (8 vs 5 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Comes with an integrated lens, while the 20D requires a separate lens.
  • More compact: Is smaller (106x61mm vs 144x106mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens built in (unlike the 20D).
  • 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.
  • Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More affordable: Was introduced at a lower price, despite coming with a built-in lens.
  • More modern: Reflects 11 years and 6 months of technical progress since the 20D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the G7X Mark II is the clear winner of the contest (18 : 8 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.

20D 08:18 G7X Mark II

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 20D and the G7X Mark II in practical situations. 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: Canon 20D vs G7X Mark II

This is why hands-on reviews by experts are important. The following table reports the overall rankings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon 20D»-HiRec-rev- Aug 2004 1,499- i Canon 20D
Canon G7 X Mark II«HiRec81/1004.5/54/54.5/5 Feb 2016 699 i i Canon G7 X Mark II
Canon M100« »Rec-4/5-3.5/5 Aug 2017 499 i i Canon M100
Canon SX730« »Rec-4/5-4/5 Apr 2017 399- i Canon SX730
Canon G5 X« »HiRec78/1004.5/54/54.5/5 Oct 2015 799 i i Canon G5 X
Canon M3« »rev75/1004.5/54.5/54/5 Feb 2015 679- i Canon M3
Canon 7D II« »Rec84/1004/55/54.5/5 Sep 2014 1,799 i i Canon 7D II
Canon G7 X« »HiRec77/1004.5/53.5/54.5/5 Sep 2014 699- i Canon G7 X
Canon 60D« »Rec79/1004/55/54.5/5 Aug 2010 1,399- i Canon 60D
Canon 7D« »HiRec84/1004.5/55/54.5/5 Sep 2009 1,699- i Canon 7D
Canon 50D« »HiRecHiRec4.5/55/54.5/5 Aug 2008 1,299- i Canon 50D
Canon 40D« »HiRecHiRec4.5/5rev4.5/5 Aug 2007 1,299- i Canon 40D
Canon 30D« »HiRecHiRecrevrev- Feb 2006 1,399- i Canon 30D
Canon 350D« »80/100HiRecrevrev- Feb 2005 899- i Canon 350D
Canon 10D« »-HiRec-rev- Feb 2003 1,999- i Canon 10D
Canon 300D« »-HiRec-rev- Aug 2003 899- i Canon 300D
Nikon D200« »HiRecHiRecrev5/5- Nov 2005 1,699- i Nikon D200

The above review scores should be interpreted 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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Canon 20D:
Check Ebay offers
Canon G7 X Mark II:
Check Amazon price

Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Canon 20D vs Canon G7 X Mark II

    Camera Specifications
    Camera Model Canon 20D Canon G7 X Mark II
    Camera Type Digital single lens reflex Fixed lens compact camera
    Camera Lens Canon EF mount lenses 24-100mm f/1.8-2.8
    Launch Date August 2004 February 2016
    Launch Price USD 1499 USD 699
    Sensor Specs
    Sensor Technology CMOS BSI-CMOS
    Sensor Format APS-C Sensor 1" Sensor
    Sensor Size 22.5 x 15.0 mm 13.2 x 15.0 mm
    Sensor Area 337.5 mm2 116.16 mm2
    Sensor Diagonal 27 mm 15.9 mm
    Crop Factor 1.6x 2.7x
    Sensor Resolution 8.2 Megapixels 20 Megapixels
    Image Resolution 3504 x 2336 pixels 5472 x 3648 pixels
    Pixel Pitch 6.42 μm 2.41 μm
    Pixel Density 2.43 MP/cm2 17.18 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60p Video
    ISO Setting 100-1600 ISO 125-12800 ISO
    ISO Boost 100-3200 ISO 125-25600 ISO
    Image Processor DIGIC 2 DIGIC 7
    DXO Sensor Quality (score) 62 ..
    DXO Color Depth (bits) 21.9 ..
    DXO Dynamic Range (EV) 11.0 ..
    DXO Low Light (ISO) 721 ..
    Screen Specs
    Viewfinder Type Optical viewfinder No viewfinder
    Viewfinder Field of View 95% n/a
    Viewfinder Magnification 0.56x n/a
    Top-Level Screen Control Panel no Top Display
    LCD Framing n/a Live View
    Rear LCD Size 1.8 inch 3.0 inch
    LCD Resolution 118k dots 1040k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs
    Autofocus System Phase-detect AF Contrast-detect AF
    Maximum Shutter Speed 1/8000s 1/2000s
    Continuous Shooting 5 shutter flaps/s 8 shutter flaps/s
    Fill Flash Build-in Flash Build-in Flash
    Storage Medium CF cards SDXC cards
    Second Storage Option Single card slot Single card slot
    Connectivity Specs
    External Flash Hotshoe no Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 1.1 USB 2.0
    HDMI Port no HDMI micro HDMI
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs
    Battery Type BP-511A power pack NB-13L power pack
    Battery Life (CIPA)700 shots per charge265 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 144 x 106 x 72 mm
    (5.7 x 4.2 x 2.8 in)
    106 x 61 x 42 mm
    (4.2 x 2.4 x 1.7 in)
    Camera Weight 770 g (27.2 oz) 319 g (11.3 oz)

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