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Canon 1D X Mark III vs Pentax K-S1

The Canon EOS-1D X Mark III and the Pentax K-S1 are two digital cameras that were announced, respectively, in January 2020 and August 2014. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (1DX Mark III) and an APS-C (K-S1) sensor. Both cameras offer a resolution of 20 megapixels.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon 1D X Mark III versus Pentax K-S1
Canon 1D X Mark III Pentax K-S1
Digital single lens reflex Digital single lens reflex
Canon EF mount lenses Pentax K mount lenses
20 MP, Full Frame Sensor 20 MP, APS-C Sensor
4K/60p Video 1080/30p Video
ISO 100-102,400 (50 - 819,200) ISO 100-51,200
Optical viewfinder Optical viewfinder
3.2 LCD, 2100k dots 3.0 LCD, 921k dots
Fixed touchscreen Fixed screen (not touch-sensitive)
20 shutter flaps per second 5.4 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodynot weather sealed
2850 shots per battery charge410 shots per battery charge
158 x 168 x 83 mm, 1440 g 121 x 93 x 70 mm, 558 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D X Mark III 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.

Body comparison

The physical size and weight of the Canon 1D X Mark III 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 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 K-S1 can be obtained in four different colors (black, grey, orange, white), while the 1DX Mark III is only available in black.

Size Canon 1D X Mark III vs Pentax K-S1
Compare 1DX Mark III versus K-S1 top
Comparison 1DX Mark III or K-S1 rear

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 considerably smaller (58 percent) than the Canon 1D X Mark III. Moreover, the K-S1 is substantially lighter (61 percent) than the 1DX Mark III. It is worth mentioning in this context that the 1DX Mark III is splash and dust resistant, while the K-S1 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 1DX Mark III gets 2850 shots out of its LP-E19 battery, while the K-S1 can take 410 images on a single charge of its D-LI109 power pack. As can be seen in the images above, the 1DX Mark III has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 1D X Mark III 158 mm 168 mm 83 mm 1440 g 2850 Y Jan 2020 6,499 i
2.
 
Pentax K-S1 121 mm 93 mm 70 mm 558 g 410 n Aug 2014 749i
3.
 
Canon 1D X Mark II 158 mm 168 mm 83 mm 1530 g 1210 Y Feb 2016 5,999i
4.
 
Canon 1D C 158 mm 164 mm 83 mm 1545 g 1120 Y Apr 2012 14,999i
5.
 
Canon 5D Mark III 152 mm 116 mm 76 mm 950 g 950 Y Mar 2012 3,499i
6.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799i
7.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999i
8.
 
Canon 5D Mark II 152 mm 114 mm 75 mm 850 g 850 Y Sep 2008 3,499i
9.
 
Canon 1Ds Mark III 150 mm 160 mm 80 mm 1385 g 1800 Y Aug 2007 7,999i
10.
 
Canon 1Ds Mark II 156 mm 158 mm 80 mm 1215 g 1200 Y Sep 2004 7,999i
11.
 
Canon 1D 156 mm 158 mm 80 mm 1585 g 500 Y Sep 2001 6,499i
12.
 
Nikon D6 160 mm 163 mm 92 mm 1270 g 3580 Y Feb 2020 6,499 i
13.
 
Nikon D5300 125 mm 98 mm 76 mm 480 g 600 n Oct 2013 799i
14.
 
Pentax K-S2 123 mm 91 mm 73 mm 678 g 410 Y Feb 2015 749 i
15.
 
Pentax K-500 130 mm 97 mm 71 mm 646 g 710 n Jun 2013 549i
16.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299i
17.
 
Sony A68 143 mm 104 mm 81 mm 610 g 540 n Nov 2015 699i
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 manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The K-S1 was launched at a markedly lower price (by 88 percent) than the 1DX Mark III, 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.

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Sensor comparison

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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 1D X Mark III features a full frame sensor and the Pentax K-S1 an APS-C sensor. The sensor area in the K-S1 is 58 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 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.

Canon 1D X Mark III and Pentax K-S1 sensor measures

Even though the 1DX Mark III has a larger sensor, both cameras offer the same resolution of 20 megapixels. This implies that the 1DX Mark III has a lower pixel density and larger individual pixels (with a pixel pitch of 6.57μm versus 4.28μm for the K-S1), which gives it a potential advantage in terms of light gathering capacity. In addition, the 1DX Mark III is much more recent (by 5 years and 4 months) than the K-S1, and its sensor will have benefitted from technological advances during this time. 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 1DX Mark III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS-1D X Mark III has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 50-819200. The corresponding ISO settings for the Pentax K-S1 are ISO 100 to ISO 51200 (no boost).

1DX Mark III versus K-S1 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the 1DX Mark III provides substantially higher image quality than the K-S1, with an overall score that is 13 points higher. This advantage is based on 0.7 bits higher color depth, 1.5 EV in additional dynamic range, and 1.6 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.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon 1D X Mark III Full Frame 20.0 5472 36484K/60p24.214.5324891
2.
 
Pentax K-S1 APS-C 20.0 5472 36481080/30p23.513.0106178
3.
 
Canon 1D X Mark II Full Frame 20.0 5472 36484K/60p24.113.5320788
4.
 
Canon 1D C Full Frame 17.9 5184 34564K/24p........
5.
 
Canon 5D Mark III Full Frame 22.1 5760 38401080/30p24.011.7229381
6.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
7.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
8.
 
Canon 5D Mark II Full Frame 21.0 5616 37441080/30p23.711.9181579
9.
 
Canon 1Ds Mark III Full Frame 21.0 5616 3744none24.012.0166380
10.
 
Canon 1Ds Mark II Full Frame 16.6 4992 3328none23.311.3148074
11.
 
Canon 1D APS-H 4.1 2496 1662none........
12.
 
Nikon D6 Full Frame 20.7 5568 37124K/30p........
13.
 
Nikon D5300 APS-C 24.0 6000 40001080/60p24.013.9133883
14.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p........
15.
 
Pentax K-500 APS-C 16.1 4928 32641080/30p23.713.1108779
16.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
17.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the 1DX Mark III provides a higher video resolution than the K-S1. It can shoot video footage at 4K/60p, while the Pentax is limited to 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The 1DX Mark III 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the 1DX Mark III has a higher magnification than the one of the K-S1 (0.76x vs 0.63x), 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 1D X Mark III, the Pentax K-S1, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
(000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon 1D X Mark IIIoptical Y 3.2 2100 fixed Y 1/8000s 20.0 n n
2.
 
Pentax K-S1optical n 3.0 921 fixed n 1/6000s 5.4 Y Y
3.
 
Canon 1D X Mark IIoptical Y 3.2 1620 fixed Y 1/8000s 16.0 n n
4.
 
Canon 1D Coptical Y 3.2 1040 fixed n 1/8000s 14.0 n n
5.
 
Canon 5D Mark IIIoptical Y 3.2 1040 fixed n 1/8000s 6.0 n n
6.
 
Canon 1D Xoptical Y 3.2 1040 fixed n 1/8000s 14.0 n n
7.
 
Canon 1D Mark IVoptical Y 3.0 920 fixed n 1/8000s 10.0 n n
8.
 
Canon 5D Mark IIoptical Y 3.0 920 fixed n 1/8000s 3.9 n n
9.
 
Canon 1Ds Mark IIIoptical Y 3.0 230 fixed n 1/8000s 5.0 n n
10.
 
Canon 1Ds Mark IIoptical Y 2.0 230 fixed n 1/8000s 4.0 n n
11.
 
Canon 1Doptical Y 2.0 120 fixed n 1/16000s 8.0 n n
12.
 
Nikon D6optical Y 3.2 2359 fixed Y 1/8000s 14.0 n n
13.
 
Nikon D5300optical n 3.2 1037 swivel n 1/4000s 5.0 Y n
14.
 
Pentax K-S2optical n 3.0 921 swivel n 1/6000s 5.4 Y Y
15.
 
Pentax K-500optical n 3.0 921 fixed n 1/6000s 6.0 Y Y
16.
 
Pentax K-3optical Y 3.2 1037 fixed n 1/8000s 8.3 Y Y
17.
 
Sony A681440 Y 2.7 460 tilting n 1/4000s 8.0 Y Y

One feature that is present on the 1DX Mark III, but is missing on the K-S1 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 Canon 1D X Mark III 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 1DX Mark III writes its imaging data to CFexpress cards, while the K-S1 uses SDXC cards. The 1DX Mark III features dual card slots, which can be very useful in case a memory card fails. In contrast, the K-S1 only has one slot.

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Connectivity comparison

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-1D X Mark III and Pentax K-S1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon 1D X Mark IIIYmonomonoYYmini3.1Y-Y
2.
 
Pentax K-S1Ystereomono--micro2.0---
3.
 
Canon 1D X Mark IIYmonomonoYYmini3.0---
4.
 
Canon 1D CYmonomonoYYmini2.0---
5.
 
Canon 5D Mark IIIYmonomonoYYmini2.0---
6.
 
Canon 1D XYmono-Y-mini2.0---
7.
 
Canon 1D Mark IVYstereo-Y-mini2.0---
8.
 
Canon 5D Mark IIYmonomonoY-mini2.0---
9.
 
Canon 1Ds Mark IIIYmono----2.0---
10.
 
Canon 1Ds Mark IIY-----2.0---
11.
 
Canon 1DY-----FW---
12.
 
Nikon D6YstereomonoYYmini3.1Y-Y
13.
 
Nikon D5300YstereomonoY-mini2.0Y--
14.
 
Pentax K-S2YmonomonoY-micro2.0YY-
15.
 
Pentax K-500Ymonomono---2.0---
16.
 
Pentax K-3YmonomonoYYmini3.0---
17.
 
Sony A68YstereomonoY-micro2.0---

It is notable that the 1DX Mark III 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.

Studio photographers will appreciate that the Canon 1D X Mark III (unlike the K-S1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Travel and landscape photographers will find it useful that the 1DX Mark III has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The 1DX Mark III 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.

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Review summary

So what is the bottom line? Is there a clear favorite between the Canon 1D X Mark III and the Pentax K-S1? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Canon EOS-1D X Mark III:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores substantially higher (13 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1.5 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.6 stops ISO advantage).
  • Better video: Provides higher definition movie capture (4K/60p 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.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.76x vs 0.63x).
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (2100k vs 921k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/6000s) to freeze action.
  • Faster burst: Shoots at higher frequency (20 vs 5.4 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (2850 versus 410) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • 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.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More modern: Reflects 5 years and 4 months of technical progress since the K-S1 launch.

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Arguments in favor of the Pentax K-S1:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • More compact: Is smaller (121x93mm vs 158x168mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 882g or 61 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (88 percent cheaper at launch).
  • 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 1DX Mark III is the clear winner of the match-up (26 : 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 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.

1DX Mark III 26:07 K-S1

How about other alternatives? Do the specifications of the Canon 1D X Mark III 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 says little about, for example, the shooting experience and imaging performance of the 1DX Mark III 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.

Expert reviews

This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 1D X Mark III..+ +..4.5/54/5 Jan 2020 6,499 i
2.
 
Pentax K-S14/5....4.5/54/5 Aug 2014 749i
3.
 
Canon 1D X Mark II....89/1004.5/54.5/5 Feb 2016 5,999i
4.
 
Canon 1D C.......... Apr 2012 14,999i
5.
 
Canon 5D Mark III..+ +82/1004.5/54.5/5 Mar 2012 3,499i
6.
 
Canon 1D X5/5....4.5/54.5/5 Oct 2011 6,799i
7.
 
Canon 1D Mark IV5/5..89/100.... Oct 2009 4,999i
8.
 
Canon 5D Mark II4/591/10079/1004/5.. Sep 2008 3,499i
9.
 
Canon 1Ds Mark III....+ +4.5/5.. Aug 2007 7,999i
10.
 
Canon 1Ds Mark II....+ +.... Sep 2004 7,999i
11.
 
Canon 1D....+ +.... Sep 2001 6,499i
12.
 
Nikon D6......4.5/54.5/5 Feb 2020 6,499 i
13.
 
Nikon D53004/5+ +79/1004.5/54.5/5 Oct 2013 799i
14.
 
Pentax K-S24.5/5....5/54.5/5 Feb 2015 749 i
15.
 
Pentax K-500......4.5/54.5/5 Jun 2013 549i
16.
 
Pentax K-34/5..83/1005/55/5 Oct 2013 1,299i
17.
 
Sony A683/5....4/54/5 Nov 2015 699i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price 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, please note that some of the review sites have changed their methodology and reporting over time.

Canon 1D X Mark III:
Check Amazon price
Pentax K-S1:
Check Ebay offers

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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Canon 1D X Mark III 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 Specifications
    Camera Model Canon 1D X Mark III 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 January 2020 August 2014
    Launch Price USD 6,499 USD 749
    Sensor Specs Canon 1D X Mark III Pentax K-S1
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor APS-C Sensor
    Sensor Size 36.0 x 24.0 mm 23.5 x 15.6 mm
    Sensor Area 864 mm2 366.6 mm2
    Sensor Diagonal 43.3 mm 28.2 mm
    Crop Factor 1.0x 1.5x
    Sensor Resolution 20 Megapixels 20 Megapixels
    Image Resolution 5472 x 3648 pixels 5472 x 3648 pixels
    Pixel Pitch 6.57 μm 4.28 μm
    Pixel Density 2.31 MP/cm2 5.45 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 4K/60p Video 1080/30p Video
    ISO Setting 100 - 102,400 ISO 100 - 51,200 ISO
    ISO Boost 50 - 819,200 ISO no Enhancement
    Image Processor DIGIC X PRIME MII
    DXO Sensor Quality (score) 91 78
    DXO Color Depth (bits) 24.2 23.5
    DXO Dynamic Range (EV) 14.5 13.0
    DXO Low Light (ISO) 3248 1061
    Screen Specs Canon 1D X Mark III Pentax K-S1
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.76x 0.63x
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 2100k dots 921k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Canon 1D X Mark III Pentax K-S1
    Focus System Phase-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/6000s
    Continuous Shooting 20 shutter flaps/s 5.4 shutter flaps/s
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash Build-in Flash
    Storage Medium CFexpress cards SDXC cards
    Second Storage Option Dual card slots Single card slot
    Connectivity Specs Canon 1D X Mark III Pentax K-S1
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.1 USB 2.0
    HDMI Port mini HDMI micro HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Bluetooth Support Bluetooth built-in no Bluetooth
    Geotagging GPS built-in no internal GPS
    Body Specs Canon 1D X Mark III Pentax K-S1
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type LP-E19 D-LI109
    Battery Life (CIPA)2850 shots per charge410 shots per charge
    Body Dimensions 158 x 168 x 83 mm
    (6.2 x 6.6 x 3.3 in)
    121 x 93 x 70 mm
    (4.8 x 3.7 x 2.8 in)
    Camera Weight 1440 g (50.8 oz) 558 g (19.7 oz)

    Did you notice an error on this page? If so, please get in touch, so that we can correct the information.

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    Once again, thanks for taking the time to provide feedback. I appreciate it.