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Pentax K-1 vs Sony A7R III

The Pentax K-1 and the Sony Alpha A7R III are two enthusiast cameras that were officially introduced, respectively, in February 2016 and October 2017. The K-1 is a DSLR, while the A7R III is a mirrorless interchangeable lens camera. Both cameras are equipped with a full frame sensor. The Pentax has a resolution of 36.2 megapixels, whereas the Sony provides 42.2 MP.

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

Headline Specifications
Pentax K-1
versus
Sony A7R III
Pentax K-1   Sony A7R III
Digital single lens reflex Mirrorless system camera
Pentax K mount lenses Sony E mount lenses
36.2 MP – Full Frame sensor 42.2 MP – Full Frame sensor
1080/60i Video 4K/30p Video
ISO 100-204,800 ISO 100-32,000 (50 - 102,400)
Optical viewfinder Electronic viewfinder (3686k dots)
3.2" LCD – 1037k dots 3.0" LCD – 1440k dots
Fully flexible screen (no touchscreen) Tilting touchscreen
4.4 shutter flaps per second 10 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
760 shots per battery charge650 shots per battery charge
137 x 110 x 86 mm, 1010 g 127 x 96 x 74 mm, 650 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-1 and the Sony Alpha A7R III? 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.

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Body comparison

The physical size and weight of the Pentax K-1 and the Sony A7R III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The K-1 can be obtained in two different colors (black, silver), while the A7R III is only available in black.

Size Pentax K-1 vs Sony A7R III
Compare K-1 versus A7R III top
Comparison K-1 or A7R III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is notably smaller (19 percent) than the Pentax K-1. Moreover, the A7R III is substantially lighter (36 percent) than the K-1. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 K-1 gets 760 shots out of its Pentax D-LI90 battery, while the A7R III can take 650 images on a single charge of its Sony NP-FZ100 power pack. The power pack in the A7R III can be charged via the USB port, which can be very convenient when travelling.

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.

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Body Specifications
  empty Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-1 137 mm 110 mm 86 mm 1010 g 760 Y Feb 2016 US$ 1 799ebay.com
2.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 US$ 3 199ebay.com
3.
 
Canon 5D Mark IV 151 mm 116 mm 76 mm 890 g 900 Y Aug 2016 US$ 3 499 amazon.com
4.
 
Nikon D500 147 mm 115 mm 81 mm 860 g 1240 Y Jan 2016 US$ 1 999ebay.com
5.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 US$ 1 999ebay.com
6.
 
Pentax K-1 II 137 mm 110 mm 86 mm 1010 g 670 Y Feb 2018 US$ 1 999 amazon.com
7.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 US$ 1 099ebay.com
8.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 US$ 1 999 amazon.com
9.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 US$ 3 199ebay.com
10.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 US$ 3 199 amazon.com
11.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 US$ 3 499ebay.com
12.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 US$ 4 499ebay.com
13.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 US$ 3 199ebay.com
14.
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 US$ 1 999ebay.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 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 K-1 was launched at a markedly lower price (by 44 percent) than the A7R III, which puts it into a different 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.

Sensor comparison

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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 a full frame sensor and have a format factor (sometimes also referred to as "crop factor") of 1.0. Within the spectrum of camera sensors, this places the review cameras among the large-sensor cameras that aim for top notch image quality. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Pentax K-1 and Sony A7R III sensor measures

While the two cameras under review share the same sensor size, the A7R III offers a higher resolution of 42.2 megapixels, compared with 36.2 MP of the K-1. This megapixels advantage translates into a 8 percent gain in linear resolution. On the other hand, these sensor specs imply that the A7R III has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.52μm versus 4.88μm for the K-1). However, it should be noted that the A7R III is a somewhat more recent model (by 1 year and 8 months) than the K-1, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

The resolution advantage of the Sony A7R III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Pentax K-1 are 36.8 x 24.6 inches or 93.5 x 62.4 cm for good quality, 29.4 x 19.6 inches or 74.8 x 49.9 cm for very good quality, and 24.5 x 16.4 inches or 62.3 x 41.6 cm for excellent quality prints.

The A7R III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Both cameras have the capacity to capture high quality composite images by combining multiple shots after shifting the sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Pentax K-1 has a native sensitivity range from ISO 100 to ISO 204800. The corresponding ISO settings for the Sony Alpha A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.

In terms of underlying technology, the K-1 is build around a CMOS sensor, while the A7R III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

K-1 versus A7R III MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). Of the two cameras under consideration, the A7R III has a markedly higher DXO score than the K-1 (overall score 4 points higher), which will translate into better image quality. The advantage is based on 0.6 bits higher color depth, 0.1 EV in additional dynamic range, and 0.1 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Pentax K-1 Full Frame 36.2 7360 49121080/60i25.414.6328096
2.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
3.
 
Canon 5D Mark IV Full Frame 30.1 6720 44804K/30p24.813.6299591
4.
 
Nikon D500 APS-C 20.7 5568 37124K/30p24.014.0132483
5.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
6.
 
Pentax K-1 II Full Frame 36.2 7360 49121080/60i25.114.0269893
7.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
8.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
9.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
10.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
11.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
12.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
13.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
14.
 
Sony A850 Full Frame 24.4 6048 4032none23.812.2141579
Note: DXO values in italics represent estimates based on sensor size and age.

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 A7R III provides a better video resolution than the K-1. It can shoot movie footage at 4K/30p, while the Pentax is limited to 1080/60i.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7R III has an electronic viewfinder (3686k dots), while the K-1 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the A7R III has a higher magnification than the one of the K-1 (0.78x vs 0.70x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Pentax K-1 and Sony A7R III in connection with corresponding information for a sample of similar cameras.

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Core Features
  empty Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Pentax K-1optical Y3.2 / 1037 full-flex n 1/8000s 4.4/s n Y
2.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
3.
 
Canon 5D Mark IVoptical Y3.2 / 1620 fixed Y 1/8000s 7.0/s n n
4.
 
Nikon D500optical Y3.2 / 2359 tilting Y 1/8000s 10.0/s n n
5.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
6.
 
Pentax K-1 IIoptical Y3.2 / 1037 full-flex n 1/8000s 4.4/s n Y
7.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
8.
 
Sony A7 III2359 n3.0 / 922 tilting Y 1/8000s 10.0/s n Y
9.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
10.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
11.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
12.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
13.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
14.
 
Sony A850optical Y3.0 / 922 fixed n 1/8000s 3.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the K-1, but is missing on the A7R III 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 reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7R III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Pentax K-1 and the Sony A7R III 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.

The K-1 writes its imaging data to SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The A7R III supports UHS-II cards (on its first slot), while the K-1 can use UHS-I cards.

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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 Pentax K-1 and Sony Alpha A7R III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Pentax K-1Ystereo / monoYYmicro2.0Y--
2.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
3.
 
Canon 5D Mark IVYmono / monoYYmini3.0YY-
4.
 
Nikon D500Ystereo / monoYYmini3.0YYY
5.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
6.
 
Pentax K-1 IIYstereo / monoYYmicro2.0Y--
7.
 
Pentax K-3 IIYmono / monoYYmini3.0---
8.
 
Sony A7 IIIYstereo / monoYYmicro3.1YYY
9.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
10.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
11.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
12.
 
Sony A9Ystereo / monoYYmicro2.0YYY
13.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
14.
 
Sony A850Y- / ---mini2.0---

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

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

Both the K-1 and the A7R III have been discontinued, but can regularly be found used on ebay. The K-1 was replaced by the Pentax K-1 II, while the A7R III was followed by the Sony A7R IV. Further information on the features and operation of the K-1 and A7R III can be found, respectively, in the Pentax K-1 Manual (free pdf) or the online Sony A7R III Manual.

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Review summary

So what is the bottom line? Is there a clear favorite between the Pentax K-1 and the Sony A7R III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Pentax K-1:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • 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 flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Longer lasting: Can take more shots (760 versus 650) on a single battery charge.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • More affordable: Was introduced into a lower priced category (44 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in February 2016).

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Reasons to prefer the Sony Alpha A7R III:

  • More detail: Has more megapixels (42.2 vs 36.2MP), which boosts linear resolution by 8%.
  • Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (1440k vs 1037k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (10 vs 4.4 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (127x96mm vs 137x110mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 360g or 36 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Was introduced somewhat (1 year and 8 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the A7R III is the clear winner of the contest (19 : 8 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.

K-1 08:19 A7R III

How about other alternatives? Do the specifications of the Pentax K-1 and the Sony A7R III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the K-1 or the A7R III. 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 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.

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Expert Camera Reviews
  empty  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price
Street
Price
1.
 
Pentax K-15/5....84/1005/55/5 Feb 2016 US$ 1 799ebay.com
2.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 US$ 3 199ebay.com
3.
 
Canon 5D Mark IV4.5/5+ +4/587/1004.5/54.5/5 Aug 2016 US$ 3 499 amazon.com
4.
 
Nikon D5005/5+ +4.7/591/1004.5/55/5 Jan 2016 US$ 1 999ebay.com
5.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 US$ 1 999ebay.com
6.
 
Pentax K-1 II....4.5/579/1004.5/54.5/5 Feb 2018 US$ 1 999 amazon.com
7.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 US$ 1 099ebay.com
8.
 
Sony A7 III..+ +4.5/589/1005/55/5 Feb 2018 US$ 1 999 amazon.com
9.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 US$ 3 199ebay.com
10.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 US$ 3 199 amazon.com
11.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 US$ 3 499ebay.com
12.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 US$ 4 499ebay.com
13.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 US$ 3 199ebay.com
14.
 
Sony A8503/5....75/100..4.5/5 Aug 2009 US$ 1 999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price 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.

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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. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Pentax K-1 vs Sony A7R III

    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 Pentax K-1 Sony A7R III
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Pentax K mount lenses Sony E mount lenses
    Launch Date February 2016 October 2017
    Launch Price USD 1,799 USD 3,199
    Sensor Specs Pentax K-1 Sony A7R III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Full Frame Sensor Full Frame Sensor
    Sensor Size 35.9 x 24.0 mm 35.9 x 24.0 mm
    Sensor Area 861.6 mm2 861.6 mm2
    Sensor Diagonal 43.2 mm 43.2 mm
    Crop Factor 1.0x 1.0x
    Sensor Resolution 36.2 Megapixels 42.2 Megapixels
    Image Resolution 7360 x 4912 pixels 7952 x 5304 pixels
    Pixel Pitch 4.88 μm 4.52 μm
    Pixel Density 4.20 MP/cm2 4.90 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 1080/60i Video 4K/30p Video
    ISO Setting 100 - 204,800 ISO 100 - 32,000 ISO
    ISO Boost no Enhancement 50 - 102,400 ISO
    Image Processor PRIME IV BIONZ X
    DXO Sensor Quality (score) 96 100
    DXO Color Depth (bits) 25.4 26.0
    DXO Dynamic Range (EV) 14.6 14.7
    DXO Low Light (ISO) 3280 3523
    Screen Specs Pentax K-1 Sony A7R III
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.70x 0.78x
    Viewfinder Resolution 3686k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 1037k dots 1440k dots
    LCD Attachment Fully flexible screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Pentax K-1 Sony A7R III
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 4.4 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy300 000 actuations500 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support UHS-I Single UHS-II
    Connectivity Specs Pentax K-1 Sony A7R III
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.1
    HDMI Port micro HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Geotagging GPS built-in no internal GPS
    Body Specs Pentax K-1 Sony A7R III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Pentax D-LI90 Sony NP-FZ100
    Battery Life (CIPA)760 shots per charge650 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 137 x 110 x 86 mm
    (5.4 x 4.3 x 3.4 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 1010 g (35.6 oz) 650 g (22.9 oz)
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    Check K-1 offers at
    ebay.com
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    Check A7R III offers at
    ebay.com

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