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Nikon Z7 vs Pentax K-3 III

The Nikon Z7 and the Pentax K-3 III are two enthusiast cameras that were revealed to the public, respectively, in August 2018 and March 2021. The Z7 is a mirrorless interchangeable lens camera, while the K-3 III is a DSLR. The cameras are based on a full frame (Z7) and an APS-C (K-3 III) sensor. The Nikon has a resolution of 45.4 megapixels, whereas the Pentax provides 25.6 MP.

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

Headline Specifications
Nikon Z7
versus
Pentax K-3 III
Nikon Z7   Pentax K-3 III
Mirrorless system camera Digital single lens reflex
Nikon Z mount lenses Pentax K mount lenses
45.4 MP – Full Frame sensor 25.6 MP – APS-C sensor
4K/30p Video 4K/30p Video
ISO 64-25,600 (32 - 102,400) ISO 100-160,000
Electronic viewfinder (3690k dots) Optical viewfinder
3.2" LCD – 2100k dots 3.2" LCD – 1620k dots
Tilting touchscreen Fixed touchscreen
9 shutter flaps per second 12 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
330 shots per battery charge800 shots per battery charge
134 x 101 x 67 mm, 675 g 135 x 104 x 74 mm, 820 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon Z7 and the Pentax K-3 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 Nikon Z7 and the Pentax K-3 III 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 size dimensions are rounded to the nearest millimeter.

The K-3 III can be obtained in two different colors (black, silver), while the Z7 is only available in black.

Size Nikon Z7 vs Pentax K-3 III
Compare Z7 versus K-3 III top
Comparison Z7 or K-3 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 III is somewhat larger (4 percent) than the Nikon Z7. Moreover, the K-3 III is markedly heavier (21 percent) than the Z7. 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 Z7 gets 330 shots out of its Nikon EN-EL15b battery, while the K-3 III can take 800 images on a single charge of its Pentax D-LI90 power pack. The power pack in the Z7 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.

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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 (USD)
Street
Price
1.
 
Nikon Z7 134 mm 101 mm 67 mm 675 g 330 Y Aug 2018 3,399ebay.com
2.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 amazon.com
3.
 
Canon R5 138 mm 98 mm 88 mm 738 g 320 Y Jul 2020 3,899 amazon.com
4.
 
Fujifilm X-H1 140 mm 97 mm 86 mm 673 g 310 Y Feb 2018 1,899ebay.com
5.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 amazon.com
6.
 
Nikon Z6 134 mm 101 mm 67 mm 675 g 310 Y Aug 2018 1,999ebay.com
7.
 
Nikon Z7 II 134 mm 101 mm 70 mm 705 g 420 Y Oct 2020 2,999 amazon.com
8.
 
Nikon Z8 144 mm 119 mm 83 mm 910 g 340 Y May 2023 3,999 amazon.com
9.
 
Panasonic S1R 149 mm 110 mm 97 mm 1016 g 380 Y Feb 2019 3,699 amazon.com
10.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299ebay.com
11.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099ebay.com
12.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649ebay.com
13.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099ebay.com
14.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
15.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
16.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 3,199 amazon.com
17.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
Note: 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-3 III was launched at a markedly lower price (by 41 percent) than the Z7, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Nikon Z7 features a full frame sensor and the Pentax K-3 III an APS-C sensor. The sensor area in the K-3 III 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.

Nikon Z7 and Pentax K-3 III sensor measures

With 45.4MP, the Z7 offers a higher resolution than the K-3 III (25.6MP), but the Z7 nevertheless has larger individual pixels (pixel pitch of 4.35μm versus 3.76μm for the K-3 III) due to its larger sensor. However, the K-3 III is a much more recent model (by 2 years and 7 months) than the Z7, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. 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 Nikon Z7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Z7 for good quality output (200 dots per inch) amounts to 41.3 x 27.5 inches or 104.9 x 69.9 cm, for very good quality (250 dpi) 33 x 22 inches or 83.9 x 55.9 cm, and for excellent quality (300 dpi) 27.5 x 18.3 inches or 69.9 x 46.6 cm. The corresponding values for the Pentax K-3 III are 31 x 20.6 inches or 78.6 x 52.4 cm for good quality, 24.8 x 16.5 inches or 62.9 x 41.9 cm for very good quality, and 20.6 x 13.8 inches or 52.4 x 35 cm for excellent quality prints.

The Z7 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the Z7, the K-3 III has the capacity to capture high quality composite images (YESMP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Nikon Z7 has a native sensitivity range from ISO 64 to ISO 25600, which can be extended to ISO 32-102400. The corresponding ISO settings for the Pentax K-3 III are ISO 100 to ISO 160000 (no boost).

In terms of underlying technology, the Z7 is build around a BSI-CMOS sensor, while the K-3 III uses a 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.

Z7 versus K-3 III MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The 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.
 
Nikon Z7 Full Frame 45.4 8256 55044K/30p26.314.6266899
2.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
3.
 
Canon R5 Full Frame 44.8 8192 54648K/30p25.314.6304295
4.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
5.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
6.
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
7.
 
Nikon Z7 II Full Frame 45.4 8256 55044K/60p26.314.72841100
8.
 
Nikon Z8 Full Frame 45.4 8256 55048K/30p26.314.2254898
9.
 
Panasonic S1R Full Frame 46.7 8368 55844K/60p26.414.13525100
10.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
11.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
12.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
13.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
14.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
15.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
16.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
17.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
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 are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the Z7 has an electronic viewfinder (3690k dots), while the K-3 III 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 Z7 has a higher magnification than the one of the K-3 III (0.80x 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 Nikon Z7 and Pentax K-3 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.
 
Nikon Z73690 Y3.2 / 2100 tilting Y 1/8000s 9.0/s n Y
2.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
3.
 
Canon R55760 Y3.2 / 2100 swivel Y 1/8000s 12.0/s n Y
4.
 
Fujifilm X-H13690 Y3.0 / 1040 full-flex Y 1/8000s 14.0/s n Y
5.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0/s n n
6.
 
Nikon Z63690 Y3.2 / 2100 tilting Y 1/8000s 12.0/s n Y
7.
 
Nikon Z7 II3690 Y3.2 / 2100 tilting Y 1/8000s 10.0/s n Y
8.
 
Nikon Z83690 Y3.2 / 2089 full-flex Y 1/32000s 30.0/s n Y
9.
 
Panasonic S1R5760 Y3.2 / 2100 full-flex Y 1/8000s 9.0/s n Y
10.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
11.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
12.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
13.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
14.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
17.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

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 Z7 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 Nikon Z7 and the Pentax K-3 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 Z7 writes its imaging data to XQD cards, while the K-3 III uses SDXC cards. The K-3 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the Z7 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 Nikon Z7 and Pentax K-3 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.
 
Nikon Z7Ystereo / monoYYmicro3.1Y-Y
2.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
3.
 
Canon R5Ymono / monoYYmicro3.2Y-Y
4.
 
Fujifilm X-H1Ystereo / monoY-micro3.0Y--
5.
 
Nikon D850Ystereo / monoYYmini3.0YYY
6.
 
Nikon Z6Ystereo / monoYYmicro3.1Y-Y
7.
 
Nikon Z7 IIYstereo / monoYYmicro3.2Y-Y
8.
 
Nikon Z8Ystereo / monoYYfull3.2Y-Y
9.
 
Panasonic S1RYstereo / monoYYfull3.1Y-Y
10.
 
Pentax K-3Ymono / monoYYmini3.0---
11.
 
Pentax K-3 IIYmono / monoYYmini3.0---
12.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
13.
 
Pentax KPYstereo / monoY--2.0Y--
14.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
16.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
17.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY

Studio photographers will appreciate that the Pentax K-3 III (unlike the Z7) 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 K-3 III has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The K-3 III is a recent model that features in the current product line-up of Pentax. In contrast, the Z7 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the Z7 was succeeded by the Nikon Z7 II. Further information on the features and operation of the Z7 and K-3 III can be found, respectively, in the Nikon Z7 Manual (free pdf) or the online Pentax K-3 III Manual.

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Review summary

So what conclusions can be drawn? Which of the two cameras – the Nikon Z7 or the Pentax K-3 III – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Nikon Z7:

  • More detail: Offers more megapixels (45.4 vs 25.6MP) with a 33% higher linear resolution.
  • Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
  • Richer colors: The pixel size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
  • 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 (0.80x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (2100k vs 1620k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Less heavy: Is lighter (by 145g or 18 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More heavily discounted: Has been available for much longer (launched in August 2018).

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Reasons to prefer the Pentax K-3 III:

  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Faster burst: Shoots at higher frequency (12 vs 9 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (800 versus 330) out of a single battery charge.
  • Easier geotagging: Features an internal GPS sensor to log localization data.
  • Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
  • 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 affordable: Was introduced into a lower priced category (41 percent cheaper at launch).
  • More modern: Reflects 2 years and 7 months of technical progress since the Z7 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the Z7 is the clear winner of the match-up (15 : 10 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.

Z7 15:10 K-3 III

How about other alternatives? Do the specifications of the Nikon Z7 and the Pentax K-3 III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR 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 incomplete and does no justice, for example, to the way the Z7 or the K-3 III 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.

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], 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 (USD)
Street
Price
1.
 
Nikon Z75/5+4.8/589/1004.5/55/5 Aug 2018 3,399ebay.com
2.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 amazon.com
3.
 
Canon R54.5/5+4/591/1004.5/54.5/5 Jul 2020 3,899 amazon.com
4.
 
Fujifilm X-H1..+5/586/1004.5/54.5/5 Feb 2018 1,899ebay.com
5.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 amazon.com
6.
 
Nikon Z65/5..5/589/1004.5/55/5 Aug 2018 1,999ebay.com
7.
 
Nikon Z7 II4.5/5..4.5/5..4.5/54.5/5 Oct 2020 2,999 amazon.com
8.
 
Nikon Z85/5..5/594/1005/54.5/5 May 2023 3,999 amazon.com
9.
 
Panasonic S1R4.5/5..4.6/589/1004.5/54.5/5 Feb 2019 3,699 amazon.com
10.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 1,299ebay.com
11.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099ebay.com
12.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 649ebay.com
13.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099ebay.com
14.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
15.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
16.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 3,199 amazon.com
17.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.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. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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? In case you would like to check on the differences and similarities of other camera models, just use the search menu 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: Nikon Z7 vs Pentax K-3 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 Nikon Z7 Pentax K-3 III
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Nikon Z mount lenses Pentax K mount lenses
    Launch Date August 2018 March 2021
    Launch Price USD 3,399 USD 1,999
    Sensor Specs Nikon Z7 Pentax K-3 III
    Sensor Technology BSI-CMOS CMOS
    Sensor Format Full Frame Sensor APS-C Sensor
    Sensor Size 35.9 x 23.9 mm 23.3 x 15.5 mm
    Sensor Area 858.01 mm2 361.15 mm2
    Sensor Diagonal 43.1 mm 28 mm
    Crop Factor 1.0x 1.5x
    Sensor Resolution 45.4 Megapixels 25.6 Megapixels
    Image Resolution 8256 x 5504 pixels 6192 x 4128 pixels
    Pixel Pitch 4.35 μm 3.76 μm
    Pixel Density 5.30 MP/cm2 7.08 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video 4K/30p Video
    ISO Setting 64 - 25,600 ISO 100 - 160,000 ISO
    ISO Boost 32 - 102,400 ISO no Enhancement
    Image Processor EXPEED 6 PRIME V
    DXO Sensor Quality (score) 99 ..
    DXO Color Depth (bits) 26.3 ..
    DXO Dynamic Range (EV) 14.6 ..
    DXO Low Light (ISO) 2668 ..
    Screen Specs Nikon Z7 Pentax K-3 III
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.80x 0.70x
    Viewfinder Resolution 3690k dots
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.2inch 3.2inch
    LCD Resolution 2100k dots 1620k dots
    LCD Attachment Tilting screen Fixed screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Nikon Z7 Pentax K-3 III
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 9 shutter flaps/s 12 shutter flaps/s
    Shutter Life Expectancy200 000 actuations200 000 actuations
    Electronic Shutterup to 1/8000sno E-Shutter
    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 XQD cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    Connectivity Specs Nikon Z7 Pentax K-3 III
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 3.1 USB 3.2
    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
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Geotagging no internal GPS GPS built-in
    Body Specs Nikon Z7 Pentax K-3 III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Nikon EN-EL15b Pentax D-LI90
    Battery Life (CIPA)330 shots per charge800 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 134 x 101 x 67 mm
    (5.3 x 4.0 x 2.6 in)
    135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    Camera Weight 675 g (23.8 oz) 820 g (28.9 oz)
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