Canon SL3 vs Pentax K-S2
The Canon EOS Rebel SL3 (called Canon 250D in some regions) and the Pentax K-S2 are two digital cameras that were announced, respectively, in April 2019 and February 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Canon has a resolution of 24 megapixels, whereas the Pentax provides 20 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 Rebel SL3 and the Pentax K-S2? 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 physical size and weight of the Canon SL3 and the Pentax K-S2 are illustrated 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.
The SL3 can be obtained in two different colors (black, white), while the K-S2 is available in six color-versions (black, grey, pink, orange, green, white).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-S2 is somewhat smaller (1 percent) than the Canon SL3. However, the K-S2 is substantially heavier (51 percent) than the SL3. It is noteworthy in this context that the K-S2 is splash and dust-proof, while the SL3 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.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.
|1.||Canon SL3||122 mm||93 mm||70 mm||449 g||1070||n||Apr 2019||599|
|2.||Pentax K-S2||123 mm||91 mm||73 mm||678 g||410||Y||Feb 2015||749|
|3.||Canon T8i||131 mm||103 mm||76 mm||515 g||800||n||Feb 2020||749|
|4.||Canon M50 Mark II||116 mm||88 mm||59 mm||387 g||305||n||Oct 2020||599|
|5.||Canon M50||116 mm||88 mm||59 mm||390 g||235||n||Feb 2018||779|
|6.||Canon T7||129 mm||101 mm||78 mm||475 g||500||n||Feb 2018||449|
|7.||Canon 77D||131 mm||100 mm||76 mm||540 g||600||n||Feb 2017||899|
|8.||Canon SL2||122 mm||93 mm||70 mm||453 g||650||n||Jun 2017||549|
|9.||Canon T7i||131 mm||100 mm||76 mm||532 g||600||n||Feb 2017||749|
|10.||Canon T6s||132 mm||101 mm||78 mm||565 g||440||n||Feb 2015||649|
|11.||Canon SL1||117 mm||91 mm||69 mm||407 g||380||n||Mar 2013||549|
|12.||Canon T2i||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|13.||Pentax KP||132 mm||101 mm||76 mm||703 g||390||Y||Jan 2017||1,099|
|14.||Pentax K-70||126 mm||93 mm||74 mm||688 g||410||Y||Jun 2016||649|
|15.||Pentax K-3 II||131 mm||100 mm||77 mm||800 g||720||Y||Apr 2015||1,099|
|16.||Pentax K-S1||121 mm||93 mm||70 mm||558 g||410||n||Aug 2014||749|
|17.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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. The SL3 was launched at a somewhat lower price (by 20 percent) than the K-S2, which makes it more attractive for photographers on a tight budget. 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. 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.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the K-S2 is 11 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (SL3) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.
Despite having a smaller sensor, the Canon SL3 offers a higher resolution of 24 megapixels, compared with 20 MP of the Pentax K-S2. 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 3.72μm versus 4.28μm for the K-S2). However, it should be noted that the SL3 is much more recent (by 4 years and 2 months) than the K-S2, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the K-S2 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Canon SL3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the SL3 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Pentax K-S2 are 27.4 x 18.2 inches or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inches or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inches or 46.3 x 30.9 cm for excellent quality prints.
The SL3 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon EOS Rebel SL3 has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 100-51200. The corresponding ISO settings for the Pentax K-S2 are ISO 100 to ISO 51200 (no boost).
For many cameras, data on sensor performance has been reported by DXO Mark. 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 table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|4.||Canon M50 Mark II||APS-C||24.0||6000||4000||4K/24p||..||..||..||..|
|15.||Pentax K-3 II||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80|
Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the SL3 provides a higher video resolution than the K-S2. It can shoot video footage at 4K/25p, while the Pentax is limited to 1080/30p.
Apart from body and sensor, cameras can and do differ across a variety of features. The SL3 and the K-S2 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 viewfinder in the K-S2 offers a wider field of view (100%) than the one in the SL3 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the K-S2 has a higher magnification (0.63x vs 0.54x), 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 SL3 and Pentax K-S2 along with similar information for a selection of comparators.
|4.||Canon M50 Mark II||2360||n||3.0||1040||swivel||Y||1/4000s||10.0||Y||n|
|15.||Pentax K-3 II||optical||Y||3.2||1037||fixed||n||1/8000s||8.3||n||Y|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The SL3 has a touchscreen, while the K-S2 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.
The Canon SL3 and the Pentax K-S2 both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
Concerning the storage of imaging data, both the SL3 and the K-S2 write their files to SDXC cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 Rebel SL3 and Pentax K-S2 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|4.||Canon M50 Mark II||Y||stereo||mono||Y||-||micro||2.0||Y||-||Y|
|15.||Pentax K-3 II||Y||mono||mono||Y||Y||mini||3.0||-||-||-|
Both the SL3 and the K-S2 are recent models that are part of the current product line-up. The K-S2 replaced the earlier Pentax K-S1, while the SL3 followed on from 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 and Pentax websites.
So what is the bottom line? Which of the two cameras – the Canon SL3 or the Pentax K-S2 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Canon EOS Rebel SL3:
- More detail: Offers more megapixels (24 vs 20MP) with a 10% higher linear resolution.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better video: Provides higher definition movie capture (4K/25p vs 1080/30p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Less heavy: Is lighter (by 229g or 34 percent) and hence easier to carry around.
- Longer lasting: Can take more shots (1070 versus 410) on a single battery charge.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced segment (20 percent cheaper at launch).
- More modern: Reflects 4 years and 2 months of technical progress since the K-S2 launch.
Advantages of the Pentax K-S2:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- 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 (0.63x vs 0.54x).
- Faster shutter: Has higher mechanical shutter speed (1/6000s vs 1/4000s) to freeze action.
- 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.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More heavily discounted: Has been around for much longer (launched in February 2015).
If the count of relative strengths (bullet points above) is taken as a measure, the SL3 emerges as the winner of the contest (11 : 8 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional 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 SL3 and the Pentax K-S2 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 comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the SL3 or the K-S2 perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
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 (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 SL3||..||o||79/100||4/5||4/5||Apr 2019||599|
|2.||Pentax K-S2||4.5/5||..||..||5/5||4.5/5||Feb 2015||749|
|3.||Canon T8i||4.5/5||+||80/100||4/5||3.5/5||Feb 2020||749|
|4.||Canon M50 Mark II||4/5||..||..||4.5/5||3.5/5||Oct 2020||599|
|5.||Canon M50||..||+||79/100||..||3.5/5||Feb 2018||779|
|6.||Canon T7||..||o||..||3.5/5||3.5/5||Feb 2018||449|
|7.||Canon 77D||4.5/5||..||82/100||4.5/5||4/5||Feb 2017||899|
|8.||Canon SL2||4/5||+ +||78/100||4.5/5||4.5/5||Jun 2017||549|
|9.||Canon T7i||4.5/5||..||80/100||4.5/5||4/5||Feb 2017||749|
|10.||Canon T6s||5/5||+||77/100||4.5/5||4.5/5||Feb 2015||649|
|11.||Canon SL1||4/5||+||78/100||4/5||4/5||Mar 2013||549|
|12.||Canon T2i||..||+ +||77/100||4/5||4.5/5||Feb 2010||699|
|13.||Pentax KP||4/5||..||82/100||5/5||4.5/5||Jan 2017||1,099|
|14.||Pentax K-70||4.5/5||..||79/100||4.5/5||4.5/5||Jun 2016||649|
|15.||Pentax K-3 II||4.5/5||..||..||5/5||5/5||Apr 2015||1,099|
|16.||Pentax K-S1||4/5||..||..||4.5/5||4/5||Aug 2014||749|
|17.||Pentax K-3||4/5||..||83/100||5/5||5/5||Oct 2013||1,299|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. 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? 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.
Specifications: Canon SL3 vs Pentax K-S2
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 SL3||Pentax K-S2|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Pentax K mount lenses|
|Launch Date||April 2019||February 2015|
|Launch Price||USD 599||USD 749|
|Sensor Specs||Canon SL3||Pentax K-S2|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||23.5 x 15.6 mm|
|Sensor Area||332.27 mm2||366.6 mm2|
|Sensor Diagonal||26.8 mm||28.2 mm|
|Sensor Resolution||24 Megapixels||20 Megapixels|
|Image Resolution||6000 x 4000 pixels||5472 x 3648 pixels|
|Pixel Pitch||3.72 μm||4.28 μm|
|Pixel Density||7.22 MP/cm2||5.45 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||4K/25p Video||1080/30p Video|
|ISO Setting||100 - 25,600 ISO||100 - 51,200 ISO|
|ISO Boost||100 - 51,200 ISO||no Enhancement|
|Image Processor||DIGIC 8||PRIME MII|
|Screen Specs||Canon SL3||Pentax K-S2|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||100%|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1040k dots||921k dots|
|LCD Attachment||Swivel screen||Swivel screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon SL3||Pentax K-S2|
|Focus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/6000s|
|Continuous Shooting||5 shutter flaps/s||5.4 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Canon SL3||Pentax K-S2|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||Bluetooth built-in||no Bluetooth|
|Body Specs||Canon SL3||Pentax K-S2|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||1070 shots per charge||410 shots per charge|
122 x 93 x 70 mm
(4.8 x 3.7 x 2.8 in)
123 x 91 x 73 mm
(4.8 x 3.6 x 2.9 in)
|Camera Weight||449 g (15.8 oz)||678 g (23.9 oz)|
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