Canon 20D vs SL1
The Canon EOS 20D and the Canon EOS Rebel SL1 (labelled Canon 100D in some countries) are two digital cameras that were revealed to the public, respectively, in August 2004 and March 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The 20D has a resolution of 8.2 megapixels, whereas the SL1 provides 17.9 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 20D||Canon SL1|
|Digital single lens reflex||Digital single lens reflex|
|Canon EF mount lenses||Canon EF mount lenses|
|8.2 MP, APS-C Sensor||17.9 MP, APS-C Sensor|
|no Video||1080/30p Video|
|ISO 100-1600 (100-3200)||ISO 100-12800 (100-25600)|
|Optical viewfinder||Optical viewfinder|
|1.8" LCD, 118k dots||3.0" LCD, 1040k dots|
|Fixed screen (not touch-sensitive)||Fixed touchscreen|
|5 shutter flaps per second||4.9 shutter flaps per second|
|700 shots per battery charge||380 shots per battery charge|
|144 x 106 x 72 mm, 770 g||117 x 91 x 69 mm, 407 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 20D and the Canon EOS Rebel SL1? 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.
The side-by-side display below illustrates the physical size and weight of the Canon 20D and the Canon SL1. 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 dimensions are rounded to the nearest millimeter.
The SL1 can be obtained in two different colors (black, white), while the 20D is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon SL1 is considerably smaller (30 percent) than the Canon 20D. Moreover, the SL1 is substantially lighter (47 percent) than the 20D. In this context, it is worth noting that neither the 20D nor the SL1 are weather-sealed.
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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Canon EF Lens Catalog.
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, 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.
|Canon 20D»||5.7 in||4.2 in||2.8 in||27.2 oz||700||n||Aug 2004||1,499||Canon 20D|
|Canon SL1«||4.6 in||3.6 in||2.7 in||14.4 oz||380||n||Mar 2013||549||Canon SL1|
|Canon SL2« »||4.8 in||3.7 in||2.8 in||16.0 oz||650||n||Jun 2017||549||Canon SL2|
|Canon 7D II« »||5.9 in||4.4 in||3.1 in||32.1 oz||670||Y||Sep 2014||1,799||Canon 7D II|
|Canon T5i« »||5.2 in||3.9 in||3.1 in||20.5 oz||440||n||Mar 2013||649||Canon T5i|
|Canon M« »||4.3 in||2.6 in||1.3 in||10.5 oz||230||n||Jul 2012||599||Canon M|
|Canon T4i« »||5.2 in||3.9 in||3.1 in||20.3 oz||440||n||Jun 2012||849||Canon T4i|
|Canon T3i« »||5.2 in||3.9 in||3.1 in||20.1 oz||440||n||Feb 2011||599||Canon T3i|
|Canon 60D« »||5.7 in||4.2 in||3.1 in||26.6 oz||1100||Y||Aug 2010||1,399||Canon 60D|
|Canon 7D« »||5.8 in||4.4 in||2.9 in||30.3 oz||800||Y||Sep 2009||1,699||Canon 7D|
|Canon 50D« »||5.7 in||4.3 in||2.9 in||29.0 oz||800||Y||Aug 2008||1,299||Canon 50D|
|Canon 40D« »||5.7 in||4.3 in||2.9 in||29.0 oz||750||n||Aug 2007||1,299||Canon 40D|
|Canon 30D« »||5.7 in||4.2 in||2.9 in||27.7 oz||750||n||Feb 2006||1,399||Canon 30D|
|Canon XT« »||5.0 in||3.7 in||2.5 in||19.0 oz||400||n||Feb 2005||899||Canon XT|
|Canon 10D« »||5.9 in||4.2 in||3.0 in||30.0 oz||500||n||Feb 2003||1,999||Canon 10D|
|Canon Rebel« »||5.6 in||3.9 in||2.8 in||22.9 oz||400||n||Aug 2003||899||Canon Rebel|
|Nikon D200« »||5.8 in||4.4 in||2.9 in||32.5 oz||400||Y||Nov 2005||1,699||Nikon D200|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The SL1 was launched at a markedly lower price (by 63 percent) than the 20D, 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 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the SL1 is 2 percent smaller. They nevertheless have the same format factor of 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Technology-wise, the SL1 uses a more advanced image processing engine (DIGIC 5) than the 20D (DIGIC 2), with benefits for noise reduction, color accuracy, and processing speed.
Despite having a slightly smaller sensor, the SL1 offers a higher resolution of 17.9 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 4.31μm versus 6.42μm for the 20D). However, it should be noted that the SL1 is much more recent (by 8 years and 7 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 resolution advantage of the Canon SL1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the SL1 for good quality output (200 dots per inch) amounts to 25.9 x 17.3 inch or 65.8 x 43.9 cm, for very good quality (250 dpi) 20.7 x 13.8 inch or 52.7 x 35.1 cm, and for excellent quality (300 dpi) 17.3 x 11.5 inch or 43.9 x 29.3 cm. The corresponding values for the Canon 20D are 17.5 x 11.7 inch or 44.5 x 29.7 cm for good quality, 14 x 9.3 inch or 35.6 x 23.7 cm for very good quality, and 11.7 x 7.8 inch or 29.7 x 19.8 cm for excellent quality prints.
The SL1 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 Rebel SL1 are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 100-25600.
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 Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Canon 20D||APS-C||8.2||3504||2336||none||21.9||11.0||721||62||Canon 20D|
|Canon SL1||APS-C||17.9||5184||3456||1080/30p||21.8||11.3||843||63||Canon SL1|
|Canon SL2||APS-C||24.0||6000||4000||1080/60p||23.6||13.4||1041||79||Canon SL2|
|Canon 7D II||APS-C||20.0||5472||3648||1080/60p||22.4||11.8||1082||70||Canon 7D II|
|Canon T5i||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||681||61||Canon T5i|
|Canon M||APS-C||17.9||5184||3456||1080/30p||22.1||11.2||827||65||Canon M|
|Canon T4i||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||722||62||Canon T4i|
|Canon T3i||APS-C||17.9||5184||3456||1080/30p||22.1||11.5||793||65||Canon T3i|
|Canon 60D||APS-C||17.9||5184||3456||1080/30p||22.2||11.5||813||66||Canon 60D|
|Canon 7D||APS-C||17.9||5184||3456||1080/30p||22.0||11.7||854||66||Canon 7D|
|Canon 50D||APS-C||15.1||4752||3168||none||21.8||11.4||696||63||Canon 50D|
|Canon 40D||APS-C||10.1||3888||2592||none||22.1||11.3||703||64||Canon 40D|
|Canon 30D||APS-C||8.2||3504||2336||none||21.5||10.8||736||59||Canon 30D|
|Canon XT||APS-C||8.0||3456||2304||none||21.8||10.8||637||60||Canon XT|
|Canon 10D||APS-C||6.3||3072||2048||none||21.1||10.9||571||57||Canon 10D|
|Canon Rebel||APS-C||6.3||3072||2048||none||21.0||10.8||544||55||Canon Rebel|
|Nikon D200||APS-C||10.0||3872||2592||none||22.3||11.5||583||64||Nikon D200|
Many modern cameras cannot only take still pictures, but also record videos. The SL1 indeed provides for movie recording, while the 20D does not. The highest resolution format that the SL1 can use is 1080/30p.
Beyond body and sensor, cameras can and do differ across a range of features. The 20D and the SL1 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the 20D has a higher magnification than the one of the SL1 (0.56x vs 0.54x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 20D, the Canon SL1, and comparable cameras.
|Canon 20D||optical||Y||1.8||118||fixed||n||1/8000s||5.0||Y||n||Canon 20D|
|Canon SL1||optical||n||3.0||1040||fixed||Y||1/4000s||4.9||Y||n||Canon SL1|
|Canon SL2||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon SL2|
|Canon 7D II||optical||Y||3.0||1040||fixed||n||1/8000s||10.0||Y||n||Canon 7D II|
|Canon T5i||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T5i|
|Canon M||none||n||3.0||1040||fixed||Y||1/4000s||4.3||n||n||Canon M|
|Canon T4i||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T4i|
|Canon T3i||optical||n||3.0||1040||swivel||n||1/4000s||3.7||Y||n||Canon T3i|
|Canon 60D||optical||Y||3.0||1040||swivel||n||1/8000s||5.3||Y||n||Canon 60D|
|Canon 7D||optical||Y||3.0||920||fixed||n||1/8000s||8.0||Y||n||Canon 7D|
|Canon 50D||optical||Y||3.0||920||fixed||n||1/8000s||6.3||Y||n||Canon 50D|
|Canon 40D||optical||Y||3.0||230||fixed||n||1/8000s||6.5||Y||n||Canon 40D|
|Canon 30D||optical||Y||2.5||230||fixed||n||1/8000s||5.0||Y||n||Canon 30D|
|Canon XT||optical||n||1.8||115||fixed||n||1/4000s||3.0||Y||n||Canon XT|
|Canon 10D||optical||Y||1.8||118||fixed||n||1/4000s||3.0||Y||n||Canon 10D|
|Canon Rebel||optical||n||1.8||118||fixed||n||1/4000s||2.5||Y||n||Canon Rebel|
|Nikon D200||optical||Y||2.5||230||fixed||n||1/8000s||5.0||Y||n||Nikon D200|
One feature that is present on the 20D, but is missing on the SL1 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 20D writes its imaging data to Compact Flash cards, while the SL1 uses SDXC cards.
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 Rebel SL1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 20D||Y||none||none||-||-||none||1.1||-||-||-||Canon 20D|
|Canon SL1||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon SL1|
|Canon SL2||Y||stereo||mono||Y||-||mini||2.0||Y||Y||Y||Canon SL2|
|Canon 7D II||Y||stereo||mono||Y||Y||mini||3.0||-||-||-||Canon 7D II|
|Canon T5i||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon T5i|
|Canon M||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon M|
|Canon T4i||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon T4i|
|Canon T3i||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon T3i|
|Canon 60D||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon 60D|
|Canon 7D||Y||mono||none||Y||-||mini||2.0||-||-||-||Canon 7D|
|Canon 50D||Y||none||none||-||-||mini||2.0||-||-||-||Canon 50D|
|Canon 40D||Y||none||none||-||-||none||2.0||-||-||-||Canon 40D|
|Canon 30D||Y||none||none||-||-||none||2.0||-||-||-||Canon 30D|
|Canon XT||Y||none||none||-||-||none||2.0||-||-||-||Canon XT|
|Canon 10D||Y||none||none||-||-||none||1.1||-||-||-||Canon 10D|
|Canon Rebel||Y||none||none||-||-||none||1.1||-||-||-||Canon Rebel|
|Nikon D200||Y||none||none||-||-||none||2.0||-||-||-||Nikon D200|
Studio photographers will appreciate that the Canon 20D (unlike the SL1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 20D and the SL1 have been discontinued, but can regularly be found used on eBay. The 20D was replaced by the Canon 30D, while the SL1 was followed by the Canon SL2. 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 how do things add up? Is there a clear favorite between the Canon 20D and the Canon SL1? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Canon EOS 20D:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.56x vs 0.54x).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Longer lasting: Can take more shots (700 versus 380) on a single battery charge.
- 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 EOS Rebel SL1:
- More detail: Has more megapixels (17.9 vs 8.2MP), which boosts linear resolution by 48%.
- Better jpgs: Has a more modern image processing engine (DIGIC 5 vs DIGIC 2).
- Broader imaging potential: Can capture not only stills but also 1080/30p video.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- 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).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More compact: Is smaller (117x91mm vs 144x106mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 363g or 47 percent) and is thus easier to take along.
- Faster data transfer: Supports a more advanced USB protocol (2.0 vs 1.1).
- More affordable: Was introduced into a lower priced category (63 percent cheaper at launch).
- More modern: Reflects 8 years and 7 months of technical progress since the 20D launch.
If the count of relative strengths (bullet points above) is taken as a measure, the SL1 is the clear winner of the contest (12 : 6 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports 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 SL1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 says little about, for example, the shooting experience and imaging performance of the 20D and the SL1 in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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.
Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
Other camera comparisons
Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
Specifications: Canon 20D vs Canon SL1
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 SL1|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Canon EF mount lenses|
|Launch Date||August 2004||March 2013|
|Launch Price||USD 1499||USD 549|
|Sensor Specs||Canon 20D||Canon SL1|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.5 x 15.0 mm||22.3 x 14.9 mm|
|Sensor Area||337.5 mm2||332.27 mm2|
|Sensor Diagonal||27 mm||26.8 mm|
|Sensor Resolution||8.2 Megapixels||17.9 Megapixels|
|Image Resolution||3504 x 2336 pixels||5184 x 3456 pixels|
|Pixel Pitch||6.42 μm||4.31 μm|
|Pixel Density||2.43 MP/cm2||5.39 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/30p Video|
|ISO Setting||100-1600 ISO||100-12800 ISO|
|ISO Boost||100-3200 ISO||100-25600 ISO|
|Image Processor||DIGIC 2||DIGIC 5|
|DXO Sensor Quality (score)||62||63|
|DXO Color Depth (bits)||21.9||21.8|
|DXO Dynamic Range (EV)||11.0||11.3|
|DXO Low Light (ISO)||721||843|
|Screen Specs||Canon 20D||Canon SL1|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||95%|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View|
|Rear LCD Size||1.8 inch||3.0 inch|
|LCD Resolution||118k dots||1040k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Canon 20D||Canon SL1|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||5 shutter flaps/s||4.9 shutter flaps/s|
|Shutter Life Expectancy||50 000 actuations||100 000 actuations|
|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||Canon 20D||Canon SL1|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 1.1||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 20D||Canon SL1|
|Battery Life (CIPA)||700 shots per charge||380 shots per charge|
144 x 106 x 72 mm
(5.7 x 4.2 x 2.8 in)
117 x 91 x 69 mm
(4.6 x 3.6 x 2.7 in)
|Camera Weight||770 g (27.2 oz)||407 g (14.4 oz)|
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