Canon T8i vs Pentax K-S1
The Canon EOS Rebel T8i (called Canon 850D in some regions) and the Pentax K-S1 are two digital cameras that were announced, respectively, in February 2020 and August 2014. 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 T8i and the Pentax K-S1? 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 T8i and the Pentax K-S1 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 size dimensions are rounded to the nearest millimeter.
The K-S1 can be obtained in four different colors (black, grey, orange, white), while the T8i 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 Pentax K-S1 is notably smaller (17 percent) than the Canon T8i. However, the K-S1 is markedly heavier (8 percent) than the T8i. In this context, it is worth noting that neither the T8i nor the K-S1 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. 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. 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 T8i||131 mm||103 mm||76 mm||515 g||800||n||Feb 2020||749|
|2.||Pentax K-S1||121 mm||93 mm||70 mm||558 g||410||n||Aug 2014||749|
|3.||Canon SL3||122 mm||93 mm||70 mm||449 g||1070||n||Apr 2019||599|
|4.||Canon T7||129 mm||101 mm||78 mm||475 g||500||n||Feb 2018||449|
|5.||Canon 77D||131 mm||100 mm||76 mm||540 g||600||n||Feb 2017||899|
|6.||Canon SL2||122 mm||93 mm||70 mm||453 g||650||n||Jun 2017||549|
|7.||Canon T7i||131 mm||100 mm||76 mm||532 g||600||n||Feb 2017||749|
|8.||Canon T6i||132 mm||101 mm||78 mm||555 g||440||n||Feb 2015||749|
|9.||Canon T6s||132 mm||101 mm||78 mm||565 g||440||n||Feb 2015||649|
|10.||Canon T5i||133 mm||100 mm||79 mm||580 g||440||n||Mar 2013||649|
|11.||Canon T4i||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849|
|12.||Canon T2i||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|13.||Nikon D5300||125 mm||98 mm||76 mm||480 g||600||n||Oct 2013||799|
|14.||Pentax K-S2||123 mm||91 mm||73 mm||678 g||410||Y||Feb 2015||749|
|15.||Pentax K-500||130 mm||97 mm||71 mm||646 g||710||n||Jun 2013||549|
|16.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|17.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699|
|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 two cameras under review were launched at the same price and fall into the same market segment. 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. 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 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. 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 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 K-S1 is 11 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (T8i) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a smaller sensor, the Canon T8i offers a higher resolution of 24 megapixels, compared with 20 MP of the Pentax K-S1. 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-S1). However, it should be noted that the T8i is much more recent (by 5 years and 5 months) than the K-S1, 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-S1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Canon T8i implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the T8i 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-S1 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 T8i has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon EOS Rebel T8i 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-S1 are ISO 100 to ISO 51200 (no boost).
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the T8i provides a higher video resolution than the K-S1. It can shoot video footage at 4K/24p, while the Pentax is limited to 1080/30p.
Apart from body and sensor, cameras can and do differ across a variety of features. The T8i and the K-S1 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-S1 offers a wider field of view (100%) than the one in the T8i (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the K-S1 has a higher magnification (0.63x vs 0.51x), 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 T8i and Pentax K-S1 along with similar information for a selection of comparators.
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The T8i has a touchscreen, while the K-S1 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.The T8i 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 K-S1 does not have a selfie-screen.
The Canon T8i 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.
Concerning the storage of imaging data, both the T8i and the K-S1 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 T8i and Pentax K-S1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
It is notable that the T8i has a microphone port, which is missing on the K-S1. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
The T8i is a recent model that features in the current product line-up of Canon. In contrast, the K-S1 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the K-S1 was succeeded by the Pentax K-S2. 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 conclusions can be drawn? Is there a clear favorite between the Canon T8i and the Pentax K-S1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Arguments in favor of the Canon EOS Rebel T8i:
- 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/24p vs 1080/30p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Better sound: Can connect to an external microphone for higher quality sound recording.
- More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or 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 (7.5 vs 5.4 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Can take more shots (800 versus 410) on a single battery charge.
- 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 5 years and 5 months of technical progress since the K-S1 launch.
Advantages of the Pentax K-S1:
- 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 0.51x).
- Faster shutter: Has higher mechanical shutter speed (1/6000s vs 1/4000s) to freeze action.
- More compact: Is smaller (121x93mm vs 131x103mm) and will fit more readily into a bag.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More heavily discounted: Has been around for much longer (launched in August 2014).
If the count of individual advantages (bullet points above) is taken as a guide, the T8i is the clear winner of the match-up (15 : 7 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 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.
How about other alternatives? Do the specifications of the Canon T8i and the Pentax K-S1 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the T8i and the K-S1 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 (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 T8i||4.5/5||+||80/100||4/5||3.5/5||Feb 2020||749|
|2.||Pentax K-S1||4/5||..||..||4.5/5||4/5||Aug 2014||749|
|3.||Canon SL3||..||o||79/100||4/5||4/5||Apr 2019||599|
|4.||Canon T7||..||o||..||3.5/5||3.5/5||Feb 2018||449|
|5.||Canon 77D||4.5/5||..||82/100||4.5/5||4/5||Feb 2017||899|
|6.||Canon SL2||4/5||+ +||78/100||4.5/5||4.5/5||Jun 2017||549|
|7.||Canon T7i||4.5/5||..||80/100||4.5/5||4/5||Feb 2017||749|
|8.||Canon T6i||5/5||..||75/100||4.5/5||4.5/5||Feb 2015||749|
|9.||Canon T6s||5/5||+||77/100||4.5/5||4.5/5||Feb 2015||649|
|10.||Canon T5i||..||..||76/100||4.5/5||4.5/5||Mar 2013||649|
|11.||Canon T4i||4/5||+ +||77/100||4.5/5||4.5/5||Jun 2012||849|
|12.||Canon T2i||..||+ +||77/100||4/5||4.5/5||Feb 2010||699|
|13.||Nikon D5300||4/5||+ +||79/100||4.5/5||4.5/5||Oct 2013||799|
|14.||Pentax K-S2||4.5/5||..||..||5/5||4.5/5||Feb 2015||749|
|15.||Pentax K-500||..||..||..||4.5/5||4.5/5||Jun 2013||549|
|16.||Pentax K-3||4/5||..||83/100||5/5||5/5||Oct 2013||1,299|
|17.||Sony A68||3/5||..||..||4/5||4/5||Nov 2015||699|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, 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 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.
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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
Specifications: Canon T8i vs Pentax K-S1
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 T8i||Pentax K-S1|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Pentax K mount lenses|
|Launch Date||February 2020||August 2014|
|Launch Price||USD 749||USD 749|
|Sensor Specs||Canon T8i||Pentax K-S1|
|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/24p 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|
|DXO Sensor Quality (score)||..||78|
|DXO Color Depth (bits)||..||23.5|
|DXO Dynamic Range (EV)||..||13.0|
|DXO Low Light (ISO)||..||1061|
|Screen Specs||Canon T8i||Pentax K-S1|
|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||Fixed screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon T8i||Pentax K-S1|
|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||7.5 shutter flaps/s||5.4 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||Build-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 T8i||Pentax K-S1|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro 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 T8i||Pentax K-S1|
|Battery Life (CIPA)||800 shots per charge||410 shots per charge|
131 x 103 x 76 mm
(5.2 x 4.1 x 3.0 in)
121 x 93 x 70 mm
(4.8 x 3.7 x 2.8 in)
|Camera Weight||515 g (18.2 oz)||558 g (19.7 oz)|
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