Canon 20D vs Canon R5
The Canon EOS 20D and the Canon EOS R5 are two enthusiast cameras that were officially introduced, respectively, in August 2004 and July 2020. The 20D is a DSLR, while the Canon R5 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (20D) and a full frame (Canon R5) sensor. The 20D has a resolution of 8.2 megapixels, whereas the Canon R5 provides 44.8 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 20D and the Canon EOS R5? 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.
An illustration of the physical size and weight of the Canon 20D and the Canon R5 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon R5 is notably smaller (11 percent) than the Canon 20D. Moreover, the Canon R5 is slightly lighter (4 percent) than the 20D. It is noteworthy in this context that the Canon R5 is splash and dust-proof, while the 20D does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
Concerning battery life, the 20D gets 700 shots out of its BP-511A battery, while the Canon R5 can take 320 images on a single charge of its LP-E6NH power pack. The power pack in the Canon R5 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, you can use the CAM-parator app to select your camera combination among a large number of options.
|1.||Canon 20D||144 mm||106 mm||72 mm||770 g||700||n||Aug 2004||1,499|
|2.||Canon R5||138 mm||98 mm||88 mm||738 g||320||Y||Jul 2020||3,899|
|3.||Canon R6||138 mm||98 mm||88 mm||680 g||360||Y||Jul 2020||2,499|
|4.||Canon 7D II||149 mm||112 mm||78 mm||910 g||670||Y||Sep 2014||1,799|
|5.||Canon 60D||145 mm||106 mm||79 mm||755 g||1100||Y||Aug 2010||1,399|
|6.||Canon 7D||148 mm||111 mm||74 mm||860 g||800||Y||Sep 2009||1,699|
|7.||Canon 50D||146 mm||108 mm||74 mm||822 g||800||Y||Aug 2008||1,299|
|8.||Canon 40D||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299|
|9.||Canon 30D||144 mm||106 mm||74 mm||785 g||750||n||Feb 2006||1,399|
|10.||Canon XT||127 mm||94 mm||64 mm||540 g||400||n||Feb 2005||899|
|11.||Canon 10D||150 mm||107 mm||75 mm||850 g||500||n||Feb 2003||1,999|
|12.||Canon Rebel||142 mm||99 mm||72 mm||649 g||400||n||Aug 2003||899|
|13.||Nikon Z7||134 mm||101 mm||67 mm||675 g||330||Y||Aug 2018||3,399|
|14.||Nikon D200||147 mm||113 mm||74 mm||920 g||400||Y||Nov 2005||1,699|
|15.||Sony A7R III||127 mm||96 mm||74 mm||650 g||650||Y||Oct 2017||3,199|
|16.||Sony A99 II||143 mm||104 mm||76 mm||849 g||490||Y||Sep 2016||3,199|
|17.||Sony A7R II||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. 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. The 20D was launched at a markedly lower price (by 62 percent) than the Canon R5, which puts it into a different market segment. 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.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and 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 R5 a full frame sensor. The sensor area in the Canon R5 is 156 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Technology-wise, the Canon R5 uses a more advanced image processing engine (DIGIC X) than the 20D (DIGIC 2), with benefits for noise reduction, color accuracy, and processing speed.
With 44.8MP, the Canon R5 offers a higher resolution than the 20D (8.2MP), but the Canon R5 has smaller individual pixels (pixel pitch of 4.39μm versus 6.42μm for the 20D). Yet, the Canon R5 is a much more recent model (by 15 years and 10 months) than the 20D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.
The resolution advantage of the Canon R5 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Canon R5 for good quality output (200 dots per inch) amounts to 41 x 27.3 inches or 104 x 69.4 cm, for very good quality (250 dpi) 32.8 x 21.9 inches or 83.2 x 55.5 cm, and for excellent quality (300 dpi) 27.3 x 18.2 inches or 69.4 x 46.3 cm. The corresponding values for the Canon 20D are 17.5 x 11.7 inches or 44.5 x 29.7 cm for good quality, 14 x 9.3 inches or 35.6 x 23.7 cm for very good quality, and 11.7 x 7.8 inches or 29.7 x 19.8 cm for excellent quality prints.
The Canon R5 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
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 EOS R5 are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-102400.
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"). Of the two cameras under consideration, the Canon R5 offers substantially better image quality than the 20D (overall score 33 points higher). The advantage is based on 3.4 bits higher color depth, 3.6 EV in additional dynamic range, and 2.1 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|2.||Canon R5||Full Frame||44.8||8192||5464||8k/30p||25.3||14.6||3042||95|
|3.||Canon R6||Full Frame||20.0||5472||3648||4k/60p||24.2||14.3||3394||90|
|4.||Canon 7D II||APS-C||20.0||5472||3648||1080/60p||22.4||11.8||1082||70|
|13.||Nikon Z7||Full Frame||45.4||8256||5504||4K/30p||26.3||14.6||2668||99|
|15.||Sony A7R III||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|16.||Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|17.||Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
Many modern cameras cannot only take still pictures, but also record videos. The Canon R5 indeed provides for movie recording, while the 20D does not. The highest resolution format that the Canon R5 can use is 8k/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the Canon R5 has an electronic viewfinder (5760k dots), while the 20D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the Canon R5 offers a wider field of view (100%) than the one in the 20D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the Canon R5 has a higher magnification (0.76x vs 0.56x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Canon 20D and Canon R5 along with similar information for a selection of comparators.
|4.||Canon 7D II||optical||Y||3.0||1040||fixed||n||1/8000s||10.0||Y||n|
|15.||Sony A7R III||3686||n||3.0||1440||tilting||Y||1/8000s||10.0||n||Y|
|16.||Sony A99 II||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y|
|17.||Sony A7R II||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y|
One difference between the cameras concerns the presence of an on-board flash. The 20D has one, while the Canon R5 does not. While the built-in flash of the 20D is not very powerful, it can at times be useful as a fill-in light.The Canon R5 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 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 Canon R5 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 R5 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 20D writes its imaging data to Compact Flash cards, while the Canon R5 uses CFexpress or SDXC cards. The Canon R5 features dual card slots, which can be very useful in case a memory card fails. In contrast, the 20D only has one slot.
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 EOS R5 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|4.||Canon 7D II||Y||stereo||mono||Y||Y||mini||3.0||-||-||-|
|15.||Sony A7R III||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y|
|16.||Sony A99 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y|
|17.||Sony A7R II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the Canon R5 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 20D does not provide wifi capability.
Studio photographers will appreciate that the Canon 20D (unlike the Canon R5) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The Canon R5 is a recent model that features in the current product line-up of Canon. In contrast, the 20D has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the 20D was succeeded by the Canon 30D. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.
So what is the bottom line? Which of the two cameras – the Canon 20D or the Canon R5 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.
Advantages of the Canon EOS 20D:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (700 versus 320) on a single battery charge.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More affordable: Was introduced into a lower priced category (62 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in August 2004).
Arguments in favor of the Canon EOS R5:
- More detail: Has more megapixels (44.8 vs 8.2MP), which boosts linear resolution by 134%.
- Better image quality: Scores substantially higher (33 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (3.4 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (3.6 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (2.1 stops ISO advantage).
- Better jpgs: Has a more modern image processing engine (DIGIC X vs DIGIC 2).
- Broader imaging potential: Can capture not only stills but also 8k/30p video.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.76x vs 0.56x).
- Larger screen: Has a bigger rear LCD (3.2" vs 1.8") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (2100k vs 118k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or 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 (10 vs 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.
- More compact: Is smaller (138x98mm vs 144x106mm) and will fit more readily into a bag.
- Easier travel charging: Can be conveniently charged via its USB port.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Faster data transfer: Supports a more advanced USB protocol (3.2 vs 1.1).
- 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.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More modern: Reflects 15 years and 10 months of technical progress since the 20D launch.
If the count of relative strengths (bullet points above) is taken as a measure, the Canon R5 is the clear winner of the contest (29 : 6 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding 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.
How about other alternatives? Do the specifications of the Canon 20D and the Canon R5 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 20D or the Canon R5. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], 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.
|1.||Canon 20D||..||..||+ +||..||..||Aug 2004||1,499|
|2.||Canon R5||4.5/5||..||91/100||4.5/5||4.5/5||Jul 2020||3,899|
|3.||Canon R6||5/5||+ +||90/100||4.5/5||5/5||Jul 2020||2,499|
|4.||Canon 7D II||4.5/5||+||84/100||4/5||4.5/5||Sep 2014||1,799|
|5.||Canon 60D||5/5||+||79/100||4/5||4.5/5||Aug 2010||1,399|
|6.||Canon 7D||5/5||+ +||84/100||4.5/5||4.5/5||Sep 2009||1,699|
|7.||Canon 50D||..||+ +||+ +||4.5/5||4.5/5||Aug 2008||1,299|
|8.||Canon 40D||..||+ +||+ +||4.5/5||4.5/5||Aug 2007||1,299|
|9.||Canon 30D||..||+ +||+ +||o||..||Feb 2006||1,399|
|10.||Canon XT||..||80/100||+ +||o||..||Feb 2005||899|
|11.||Canon 10D||..||..||+ +||..||..||Feb 2003||1,999|
|12.||Canon Rebel||..||..||+ +||..||..||Aug 2003||899|
|13.||Nikon Z7||5/5||+||89/100||4.5/5||5/5||Aug 2018||3,399|
|14.||Nikon D200||..||+ +||+ +||o||..||Nov 2005||1,699|
|15.||Sony A7R III||..||+ +||90/100||4.5/5||5/5||Oct 2017||3,199|
|16.||Sony A99 II||..||..||85/100||4.5/5||4.5/5||Sep 2016||3,199|
|17.||Sony A7R II||5/5||+ +||90/100||5/5||5/5||Jun 2015||3,199|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.
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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
Specifications: Canon 20D vs Canon R5
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 Model||Canon 20D||Canon R5|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Canon EF mount lenses||Canon RF mount lenses|
|Launch Date||August 2004||July 2020|
|Launch Price||USD 1,499||USD 3,899|
|Sensor Specs||Canon 20D||Canon R5|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||22.5 x 15.0 mm||36.0 x 24.0 mm|
|Sensor Area||337.5 mm2||864 mm2|
|Sensor Diagonal||27 mm||43.3 mm|
|Sensor Resolution||8.2 Megapixels||44.8 Megapixels|
|Image Resolution||3504 x 2336 pixels||8192 x 5464 pixels|
|Pixel Pitch||6.42 μm||4.39 μm|
|Pixel Density||2.43 MP/cm2||5.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||8k/30p Video|
|ISO Setting||100 - 1,600 ISO||100 - 51,200 ISO|
|ISO Boost||100 - 3,200 ISO||50 - 102,400 ISO|
|Image Processor||DIGIC 2||DIGIC X|
|DXO Sensor Quality (score)||62||95|
|DXO Color Depth (bits)||21.9||25.3|
|DXO Dynamic Range (EV)||11.0||14.6|
|DXO Low Light (ISO)||721||3042|
|Screen Specs||Canon 20D||Canon R5|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||95%||100%|
|Viewfinder Resolution||5760k dots|
|Top-Level Screen||Control Panel||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||1.8inch||3.2inch|
|LCD Resolution||118k dots||2100k dots|
|LCD Attachment||Fixed screen||Swivel screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Canon 20D||Canon R5|
|Focus System||Phase-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/8000s|
|Continuous Shooting||5 shutter flaps/s||10 shutter flaps/s|
|Shutter Life Expectancy||50 000 actuations||300 000 actuations|
|Electronic Shutter||no E-Shutter||up to 1/8000s|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||CF cards||CFexpress or SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|Connectivity Specs||Canon 20D||Canon R5|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 1.1||USB 3.2|
|HDMI Port||no HDMI||micro HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||no Wifi||Wifi built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Canon 20D||Canon R5|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||700 shots per charge||320 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
144 x 106 x 72 mm
(5.7 x 4.2 x 2.8 in)
138 x 98 x 88 mm
(5.4 x 3.9 x 3.5 in)
|Camera Weight||770 g (27.2 oz)||738 g (26.0 oz)|
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