Canon 100D vs Pentax K-S1
The Canon EOS 100D (called Canon SL1 in some regions) and the Pentax K-S1 are two digital cameras that were announced, respectively, in March 2013 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 17.9 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 100D 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.
An illustration of the physical size and weight of the Canon 100D and the Pentax K-S1 is provided 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.
The 100D can be obtained in two different colors (black, white), while the K-S1 is available in four color-versions (black, grey, orange, white).
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 larger (6 percent) than the Canon 100D. Moreover, the K-S1 is substantially heavier (37 percent) than the 100D. In this context, it is worth noting that neither the 100D 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. 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 100D||117 mm||91 mm||69 mm||407 g||380||n||Mar 2013||549||ebay.com|
|2.||Pentax K-S1||121 mm||93 mm||70 mm||558 g||410||n||Aug 2014||749||ebay.com|
|3.||Canon 4000D||129 mm||102 mm||77 mm||436 g||500||n||Feb 2018||399||amazon.com|
|4.||Canon 200D||122 mm||93 mm||70 mm||453 g||650||n||Jun 2017||549||ebay.com|
|5.||Canon 7D II||149 mm||112 mm||78 mm||910 g||670||Y||Sep 2014||1,799||ebay.com|
|6.||Canon 1200D||130 mm||100 mm||78 mm||480 g||500||n||Feb 2014||449||ebay.com|
|7.||Canon 700D||133 mm||100 mm||79 mm||580 g||440||n||Mar 2013||649||ebay.com|
|8.||Canon G16||109 mm||76 mm||40 mm||356 g||360||n||Aug 2013||549||ebay.com|
|9.||Canon 650D||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849||ebay.com|
|10.||Canon M||109 mm||66 mm||32 mm||298 g||230||n||Jul 2012||599||ebay.com|
|11.||Canon 600D||133 mm||100 mm||80 mm||570 g||440||n||Feb 2011||599||ebay.com|
|12.||Nikon D5300||125 mm||98 mm||76 mm||480 g||600||n||Oct 2013||799||ebay.com|
|13.||Panasonic G6||122 mm||85 mm||71 mm||390 g||340||n||Apr 2013||599||ebay.com|
|14.||Pentax K-S2||123 mm||91 mm||73 mm||678 g||410||Y||Feb 2015||749||ebay.com|
|15.||Pentax K-500||130 mm||97 mm||71 mm||646 g||710||n||Jun 2013||549||ebay.com|
|16.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299||ebay.com|
|17.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699||ebay.com|
|Note: 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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The 100D was launched at a markedly lower price (by 27 percent) than the K-S1, 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.
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.
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 (100D) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 20MP, the K-S1 offers a higher resolution than the 100D (17.9MP), but the K-S1 has marginally smaller individual pixels (pixel pitch of 4.28μm versus 4.31μm for the 100D). Yet, the K-S1 is a somewhat more recent model (by 1 year and 5 months) than the 100D, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. 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 Pentax K-S1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-S1 for good quality output (200 dots per inch) amounts to 27.4 x 18.2 inches or 69.5 x 46.3 cm, for very good quality (250 dpi) 21.9 x 14.6 inches or 55.6 x 37.1 cm, and for excellent quality (300 dpi) 18.2 x 12.2 inches or 46.3 x 30.9 cm. The corresponding values for the Canon 100D are 25.9 x 17.3 inches or 65.8 x 43.9 cm for good quality, 20.7 x 13.8 inches or 52.7 x 35.1 cm for very good quality, and 17.3 x 11.5 inches or 43.9 x 29.3 cm for excellent quality prints.
The 100D has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon EOS 100D has a native sensitivity range from ISO 100 to ISO 12800, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax K-S1 are ISO 100 to ISO 51200 (no boost).
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
For many cameras, data on sensor performance has been reported by DXO Mark. 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. Of the two cameras under consideration, the K-S1 offers substantially better image quality than the 100D (overall score 15 points higher). The advantage is based on 1.7 bits higher color depth, 1.7 EV in additional dynamic range, and 0.3 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|5.||Canon 7D II||APS-C||20.0||5472||3648||1080/60p||22.4||11.8||1082||70|
|13.||Panasonic G6||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (1080/30p).
Beyond body and sensor, cameras can and do differ across a range of features. The 100D 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 100D (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 0.54x), 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 100D, the Pentax K-S1, and comparable cameras.
|1.||Canon 100D||optical||n||3.0 / 1040||fixed||Y||1/4000s||4.9/s||Y||n|
|2.||Pentax K-S1||optical||n||3.0 / 921||fixed||n||1/6000s||5.4/s||Y||Y|
|3.||Canon 4000D||optical||n||2.7 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|4.||Canon 200D||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|5.||Canon 7D II||optical||Y||3.0 / 1040||fixed||n||1/8000s||10.0/s||Y||n|
|6.||Canon 1200D||optical||n||3.0 / 460||fixed||n||1/4000s||3.0/s||Y||n|
|7.||Canon 700D||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|8.||Canon G16||optical||n||3.0 / 922||fixed||n||1/4000s||2.2/s||Y||Y|
|9.||Canon 650D||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|10.||Canon M||none||n||3.0 / 1040||fixed||Y||1/4000s||4.3/s||n||n|
|11.||Canon 600D||optical||n||3.0 / 1040||swivel||n||1/4000s||3.7/s||Y||n|
|12.||Nikon D5300||optical||n||3.2 / 1037||swivel||n||1/4000s||5.0/s||Y||n|
|13.||Panasonic G6||1440||n||3.0 / 1036||swivel||Y||1/4000s||7.0/s||Y||n|
|14.||Pentax K-S2||optical||n||3.0 / 921||swivel||n||1/6000s||5.4/s||Y||Y|
|15.||Pentax K-500||optical||n||3.0 / 921||fixed||n||1/6000s||6.0/s||Y||Y|
|16.||Pentax K-3||optical||Y||3.2 / 1037||fixed||n||1/8000s||8.3/s||Y||Y|
|17.||Sony A68||1440||Y||2.7 / 460||tilting||n||1/4000s||8.0/s||Y||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The 100D has a touchscreen, while the K-S1 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
Concerning the storage of imaging data, both the 100D 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 100D and Pentax K-S1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon 100D||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|2.||Pentax K-S1||Y||stereo / mono||-||-||micro||2.0||-||-||-|
|3.||Canon 4000D||Y||mono / mono||-||-||mini||2.0||Y||Y||-|
|4.||Canon 200D||Y||stereo / mono||Y||-||mini||2.0||Y||Y||Y|
|5.||Canon 7D II||Y||stereo / mono||Y||Y||mini||3.0||-||-||-|
|6.||Canon 1200D||Y||mono / mono||-||-||mini||2.0||-||-||-|
|7.||Canon 700D||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|8.||Canon G16||Y||stereo / mono||-||-||mini||2.0||Y||-||-|
|9.||Canon 650D||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|10.||Canon M||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|11.||Canon 600D||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|12.||Nikon D5300||Y||stereo / mono||Y||-||mini||2.0||Y||-||-|
|13.||Panasonic G6||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|14.||Pentax K-S2||Y||mono / mono||Y||-||micro||2.0||Y||Y||-|
|15.||Pentax K-500||Y||mono / mono||-||-||-||2.0||-||-||-|
|16.||Pentax K-3||Y||mono / mono||Y||Y||mini||3.0||-||-||-|
|17.||Sony A68||Y||stereo / mono||Y||-||micro||2.0||-||-||-|
It is notable that the 100D 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.
Both the 100D and the K-S1 have been discontinued, but can regularly be found used on ebay. The 100D was replaced by the Canon 200D, while the K-S1 was followed by the Pentax K-S2. Further information on the features and operation of the 100D and K-S1 can be found, respectively, in the Canon 100D Manual (free pdf) or the online Pentax K-S1 Manual.
So how do things add up? Is the Canon 100D better than the Pentax K-S1 or vice versa? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Canon EOS 100D:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Less heavy: Is lighter (by 151g or 27 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced category (27 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in March 2013).
Arguments in favor of the Pentax K-S1:
- More detail: Has more megapixels (20 vs 17.9MP), which boosts linear resolution by 6%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (15 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.7 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.3 stops ISO advantage).
- 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.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More modern: Was introduced somewhat (1 year and 5 months) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the K-S1 emerges as the winner of the match-up (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 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 100D 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the 100D or the K-S1 perform in practice. 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 why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], 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 100D||4/5||+||..||78/100||4/5||4/5||Mar 2013||549||ebay.com|
|2.||Pentax K-S1||4/5||..||..||..||4.5/5||4/5||Aug 2014||749||ebay.com|
|3.||Canon 4000D||..||o||3/5||..||3.5/5||3.5/5||Feb 2018||399||amazon.com|
|4.||Canon 200D||4/5||+ +||4/5||78/100||4.5/5||4.5/5||Jun 2017||549||ebay.com|
|5.||Canon 7D II||4.5/5||+||3.5/5||84/100||4/5||4.5/5||Sep 2014||1,799||ebay.com|
|6.||Canon 1200D||3/5||+||..||..||4/5||4.5/5||Feb 2014||449||ebay.com|
|7.||Canon 700D||..||..||..||76/100||4.5/5||4.5/5||Mar 2013||649||ebay.com|
|8.||Canon G16||4/5||+||..||..||4.5/5||4.5/5||Aug 2013||549||ebay.com|
|9.||Canon 650D||4/5||+ +||..||77/100||4.5/5||4.5/5||Jun 2012||849||ebay.com|
|10.||Canon M||3/5||+||..||..||4/5||4/5||Jul 2012||599||ebay.com|
|11.||Canon 600D||3/5||o||..||77/100||4.5/5||4.5/5||Feb 2011||599||ebay.com|
|12.||Nikon D5300||4/5||+ +||..||79/100||4.5/5||4.5/5||Oct 2013||799||ebay.com|
|13.||Panasonic G6||4/5||+ +||..||..||5/5||4.5/5||Apr 2013||599||ebay.com|
|14.||Pentax K-S2||4.5/5||..||..||..||5/5||4.5/5||Feb 2015||749||ebay.com|
|15.||Pentax K-500||..||..||..||..||4.5/5||4.5/5||Jun 2013||549||ebay.com|
|16.||Pentax K-3||4/5||..||..||83/100||5/5||5/5||Oct 2013||1,299||ebay.com|
|17.||Sony A68||3/5||..||..||..||4/5||4/5||Nov 2015||699||ebay.com|
|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 comparisons of ratings among very different cameras or across long time periods 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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 100D vs Canon G5 X
- Canon 100D vs Fujifilm XP130
- Canon 100D vs Fujifilm XP140
- Canon 100D vs Nikon D5000
- Canon 100D vs Nikon D5100
- Canon 100D vs Panasonic GF6
- Nikon Z50 vs Pentax K-S1
- Olympus E-M1 III vs Pentax K-S1
- Panasonic G95 vs Pentax K-S1
- Pentax K-S1 vs Sigma fp L
- Pentax K-S1 vs Sony ZV-E10
- Pentax K-S1 vs Zeiss ZX1
Specifications: Canon 100D 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 100D||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||March 2013||August 2014|
|Launch Price||USD 549||USD 749|
|Sensor Specs||Canon 100D||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||17.9 Megapixels||20 Megapixels|
|Image Resolution||5184 x 3456 pixels||5472 x 3648 pixels|
|Pixel Pitch||4.31 μm||4.28 μm|
|Pixel Density||5.39 MP/cm2||5.45 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/30p Video||1080/30p Video|
|ISO Setting||100 - 12,800 ISO||100 - 51,200 ISO|
|ISO Boost||100 - 25,600 ISO||no Enhancement|
|Image Processor||DIGIC 5||PRIME MII|
|DXO Sensor Quality (score)||63||78|
|DXO Color Depth (bits)||21.8||23.5|
|DXO Dynamic Range (EV)||11.3||13.0|
|DXO Low Light (ISO)||843||1061|
|Screen Specs||Canon 100D||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||Fixed screen||Fixed screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Canon 100D||Pentax K-S1|
|Focus System||Phase-detect AF||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/6000s|
|Continuous Shooting||4.9 shutter flaps/s||5.4 shutter flaps/s|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Single or Dual Card Slots||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Canon 100D||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||no Wifi||no Wifi|
|Body Specs||Canon 100D||Pentax K-S1|
|Battery Life (CIPA)||380 shots per charge||410 shots per charge|
117 x 91 x 69 mm
(4.6 x 3.6 x 2.7 in)
121 x 93 x 70 mm
(4.8 x 3.7 x 2.8 in)
|Camera Weight||407 g (14.4 oz)||558 g (19.7 oz)|
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