Nikon Z6 III vs Pentax K-3 II
The Nikon Z6 III and the Pentax K-3 II are two enthusiast cameras that were announced, respectively, in June 2024 and April 2015. The Z6 III is a mirrorless interchangeable lens camera, while the K-3 II is a DSLR. The cameras are based on a full frame (Z6 III) and an APS-C (K-3 II) sensor. The Nikon has a resolution of 24.3 megapixels, whereas the Pentax provides 24.1 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check Z6 III price at
amazon.com

Check K-3 II offers at
ebay.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon Z6 III and the Pentax K-3 II? 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 side-by-side display below illustrates the physical size and weight of the Nikon Z6 III and the Pentax K-3 II. 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-3 II can be obtained in two different colors (black, silver), while the Z6 III is only available in black.



If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-3 II is notably smaller (8 percent) than the Nikon Z6 III. However, the K-3 II is markedly heavier (19 percent) than the Z6 III. 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 Z6 III gets 380 shots out of its Nikon EN-EL15c battery, while the K-3 II can take 720 images on a single charge of its Pentax D-LI90 power pack. The power pack in the Z6 III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
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.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon Z6 III | 139 mm | 102 mm | 74 mm | 670 g | 380 | Y | Jun 2024 | US$ 2 499 | amazon.com | |
| 2. | Pentax K-3 II | 131 mm | 100 mm | 77 mm | 800 g | 720 | Y | Apr 2015 | US$ 1 099 | ebay.com | |
| 3. | Canon R6 Mark II | 138 mm | 98 mm | 88 mm | 670 g | 450 | Y | Nov 2022 | US$ 2 499 | amazon.com | |
| 4. | Nikon D7200 | 136 mm | 107 mm | 76 mm | 765 g | 1110 | Y | Mar 2015 | US$ 1 199 | ebay.com | |
| 5. | Nikon Z5 | 134 mm | 101 mm | 67 mm | 675 g | 470 | Y | Jul 2020 | US$ 1 399 | ebay.com | |
| 6. | Nikon Z5 II | 134 mm | 101 mm | 72 mm | 700 g | 330 | Y | Apr 2025 | US$ 1 699 | amazon.com | |
| 7. | Nikon Z6 | 134 mm | 101 mm | 67 mm | 675 g | 310 | Y | Aug 2018 | US$ 1 999 | ebay.com | |
| 8. | Nikon Z6 II | 134 mm | 101 mm | 70 mm | 705 g | 410 | Y | Oct 2020 | US$ 1 999 | amazon.com | |
| 9. | Nikon Z7 II | 134 mm | 101 mm | 70 mm | 705 g | 420 | Y | Oct 2020 | US$ 2 999 | amazon.com | |
| 10. | Nikon Z8 | 144 mm | 119 mm | 83 mm | 910 g | 340 | Y | May 2023 | US$ 3 999 | amazon.com | |
| 11. | Nikon Zf | 144 mm | 103 mm | 49 mm | 710 g | 380 | Y | Sep 2023 | US$ 1 999 | amazon.com | |
| 12. | Panasonic S5 II | 134 mm | 102 mm | 90 mm | 740 g | 370 | Y | Jan 2023 | US$ 1 999 | amazon.com | |
| 13. | Pentax K-3 | 131 mm | 100 mm | 77 mm | 800 g | 560 | Y | Oct 2013 | US$ 1 299 | ebay.com | |
| 14. | Pentax K-3 III | 135 mm | 104 mm | 74 mm | 820 g | 800 | Y | Mar 2021 | US$ 1 999 | amazon.com | |
| 15. | Pentax K-5 II | 131 mm | 97 mm | 73 mm | 760 g | 740 | Y | Sep 2012 | US$ 1 099 | ebay.com | |
| 16. | Pentax K-S2 | 123 mm | 91 mm | 73 mm | 678 g | 410 | Y | Feb 2015 | US$ 749 | ebay.com | |
| 17. | Sony A9 III | 136 mm | 97 mm | 83 mm | 702 g | 530 | Y | Nov 2023 | US$ 5 999 | amazon.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 K-3 II was launched at a markedly lower price (by 56 percent) than the Z6 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.
Sensor comparison
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. 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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Nikon Z6 III features a full frame sensor and the Pentax K-3 II an APS-C sensor. The sensor area in the K-3 II is 57 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.

With 24.3MP, the Z6 III offers a slightly higher resolution than the K-3 II (24.1MP), but the Z6 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.90μm for the K-3 II) due to its larger sensor. Moreover, the Z6 III is a much more recent model (by 9 years and 1 month) than the K-3 II, 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 the K-3 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The Z6 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 Nikon Z6 III has a native sensitivity range from ISO 100 to ISO 64000, which can be extended to ISO 50-204800. The corresponding ISO settings for the Pentax K-3 II are ISO 100 to ISO 51200 (no boost).
In terms of underlying technology, the Z6 III is build around a BSI-CMOS sensor, while the K-3 II 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.

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. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon Z6 III | Full Frame | 24.3 | 6048 | 4024 | 6K/60p | 25.4 | 14.8 | 3318 | 97 | |
| 2. | Pentax K-3 II | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.6 | 13.6 | 1106 | 80 | |
| 3. | Canon R6 Mark II | Full Frame | 24.0 | 6000 | 4000 | 4k/60p | 25.4 | 14.6 | 3154 | 96 | |
| 4. | Nikon D7200 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.5 | 14.6 | 1333 | 87 | |
| 5. | Nikon Z5 | Full Frame | 24.2 | 6016 | 4016 | 4K/30p | 25.3 | 14.3 | 2929 | 95 | |
| 6. | Nikon Z5 II | Full Frame | 24.4 | 6048 | 4032 | 4K/60p | 25.4 | 14.8 | 3398 | 97 | |
| 7. | Nikon Z6 | Full Frame | 24.3 | 6048 | 4024 | 4K/30p | 25.3 | 14.3 | 3299 | 95 | |
| 8. | Nikon Z6 II | Full Frame | 24.3 | 6048 | 4024 | 4K/60p | 25.0 | 14.4 | 3303 | 94 | |
| 9. | Nikon Z7 II | Full Frame | 45.4 | 8256 | 5504 | 4K/60p | 26.3 | 14.7 | 2841 | 100 | |
| 10. | Nikon Z8 | Full Frame | 45.4 | 8256 | 5504 | 8K/30p | 26.3 | 14.2 | 2548 | 98 | |
| 11. | Nikon Zf | Full Frame | 24.3 | 6048 | 4024 | 4K/60p | 25.4 | 14.7 | 3243 | 96 | |
| 12. | Panasonic S5 II | Full Frame | 24.0 | 6000 | 4000 | 6K/30p | 25.4 | 14.6 | 3158 | 96 | |
| 13. | Pentax K-3 | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.7 | 13.4 | 1216 | 80 | |
| 14. | Pentax K-3 III | APS-C | 25.6 | 6192 | 4128 | 4K/30p | 24.2 | 13.7 | 2083 | 85 | |
| 15. | Pentax K-5 II | APS-C | 16.1 | 4928 | 3264 | 1080/25p | 23.8 | 14.1 | 1235 | 82 | |
| 16. | Pentax K-S2 | APS-C | 20.0 | 5472 | 3648 | 1080/30p | 23.6 | 12.9 | 1514 | 79 | |
| 17. | Sony A9 III | Full Frame | 24.0 | 6000 | 4000 | 4K/120p | 25.4 | 14.7 | 3243 | 96 | |
| 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. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the Z6 III provides a higher video resolution than the K-3 II. It can shoot video footage at 6K/60p, while the Pentax is limited to 1080/60i.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. For example, the Z6 III has an electronic viewfinder (5760k dots), while the K-3 II 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 Z6 III has a higher magnification than the one of the K-3 II (0.80x vs 0.63x), 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 Z6 III and Pentax K-3 II in connection with corresponding information for a sample of similar cameras.

| 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 Z6 III | 5760 | Y | 3.2 / 2100 | swivel | Y | 1/8000s | 14.0/s | n | Y | |
| 2. | Pentax K-3 II | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | n | Y | |
| 3. | Canon R6 Mark II | 3690 | n | 3.0 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 4. | Nikon D7200 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 6.0/s | Y | n | |
| 5. | Nikon Z5 | 3690 | n | 3.2 / 1040 | tilting | Y | 1/8000s | 4.5/s | n | Y | |
| 6. | Nikon Z5 II | 3690 | n | 3.2 / 2100 | swivel | Y | 1/8000s | 14.0/s | n | Y | |
| 7. | Nikon Z6 | 3690 | Y | 3.2 / 2100 | tilting | Y | 1/8000s | 12.0/s | n | Y | |
| 8. | Nikon Z6 II | 3690 | Y | 3.2 / 2100 | tilting | Y | 1/8000s | 14.0/s | n | Y | |
| 9. | Nikon Z7 II | 3690 | Y | 3.2 / 2100 | tilting | Y | 1/8000s | 10.0/s | n | Y | |
| 10. | Nikon Z8 | 3690 | Y | 3.2 / 2089 | full-flex | Y | 1/32000s | 30.0/s | n | Y | |
| 11. | Nikon Zf | 3690 | n | 3.2 / 2100 | swivel | Y | 1/8000s | 14.0/s | n | Y | |
| 12. | Panasonic S5 II | 3680 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 9.0/s | n | Y | |
| 13. | Pentax K-3 | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | Y | Y | |
| 14. | Pentax K-3 III | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 12.0/s | n | Y | |
| 15. | Pentax K-5 II | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 7.0/s | Y | Y | |
| 16. | Pentax K-S2 | optical | n | 3.0 / 921 | swivel | n | 1/6000s | 5.4/s | Y | Y | |
| 17. | Sony A9 III | 9440 | n | 3.2 / 2100 | full-flex | Y | 1/80000s | 120.0/s | n | Y | |
| Note: *) 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 Z6 III has a touchscreen, while the K-3 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The Z6 III has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the K-3 II does not have a selfie-screen.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 Z6 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 Nikon Z6 III and the Pentax K-3 II 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 Z6 III writes its imaging data to CFexpress (type B) or SDXC cards, while the K-3 II uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The Z6 III supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the K-3 II can use UHS-I cards (up to 104 MB/s).
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 Z6 III and Pentax K-3 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

| Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon Z6 III | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 2. | Pentax K-3 II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
| 3. | Canon R6 Mark II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 4. | Nikon D7200 | Y | stereo / mono | Y | Y | mini | 2.0 | Y | Y | - | |
| 5. | Nikon Z5 | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 6. | Nikon Z5 II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 7. | Nikon Z6 | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 8. | Nikon Z6 II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 9. | Nikon Z7 II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 10. | Nikon Z8 | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 11. | Nikon Zf | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 12. | Panasonic S5 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 13. | Pentax K-3 | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
| 14. | Pentax K-3 III | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 15. | Pentax K-5 II | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
| 16. | Pentax K-S2 | Y | mono / mono | Y | - | micro | 2.0 | Y | Y | - | |
| 17. | Sony A9 III | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y |
It is notable that the Z6 III offers wifi support, while the K-3 II does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the Pentax K-3 II (unlike the Z6 III) 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 II has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
The Z6 III is a recent model that features in the current product line-up of Nikon. In contrast, the K-3 II has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the K-3 II was succeeded by the Pentax K-3 III. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Pentax websites.
Review summary
So what is the bottom line? Is there a clear favorite between the Nikon Z6 III and the Pentax K-3 II? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Nikon Z6 III:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Features a larger and more technologically advanced imaging sensor.
- Richer colors: The sensor size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
- Better video: Provides higher definition movie capture (6K/60p 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 (0.80x vs 0.63x).
- More detailed LCD: Has a higher resolution rear screen (2100k vs 1037k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (14 vs 8.3 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Less heavy: Is lighter (by 130g or 16 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.
- 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.
- Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
- More modern: Reflects 9 years and 1 month of technical progress since the K-3 II launch.

Advantages of the Pentax K-3 II:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Gets more shots (720 versus 380) out of a single battery charge.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More affordable: Was introduced into a lower priced category (56 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in April 2015).
If the count of relative strengths (bullet points above) is taken as a measure, the Z6 III is the clear winner of the match-up (22 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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 Nikon Z6 III and the Pentax K-3 II 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the Z6 III or the K-3 II. 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 adjacent summary-table relays the overall verdicts of several of the most popular camera 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.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Nikon Z6 III | .. | .. | .. | .. | .. | .. | Jun 2024 | US$ 2 499 | amazon.com | |
| 2. | Pentax K-3 II | 4.5/5 | .. | .. | .. | 5/5 | 5/5 | Apr 2015 | US$ 1 099 | ebay.com | |
| 3. | Canon R6 Mark II | 5/5 | + + | 4.5/5 | 91/100 | 4.5/5 | 5/5 | Nov 2022 | US$ 2 499 | amazon.com | |
| 4. | Nikon D7200 | 4/5 | + + | .. | 84/100 | 4.5/5 | 4.5/5 | Mar 2015 | US$ 1 199 | ebay.com | |
| 5. | Nikon Z5 | 4/5 | .. | 4/5 | 89/100 | 4.5/5 | 4/5 | Jul 2020 | US$ 1 399 | ebay.com | |
| 6. | Nikon Z5 II | .. | .. | .. | .. | .. | .. | Apr 2025 | US$ 1 699 | amazon.com | |
| 7. | Nikon Z6 | 5/5 | .. | 5/5 | 89/100 | 4.5/5 | 5/5 | Aug 2018 | US$ 1 999 | ebay.com | |
| 8. | Nikon Z6 II | 4.5/5 | .. | 4/5 | 89/100 | 4.5/5 | 4.5/5 | Oct 2020 | US$ 1 999 | amazon.com | |
| 9. | Nikon Z7 II | 4.5/5 | .. | 4.5/5 | .. | 4.5/5 | 4.5/5 | Oct 2020 | US$ 2 999 | amazon.com | |
| 10. | Nikon Z8 | 5/5 | .. | 5/5 | 94/100 | 5/5 | 4.5/5 | May 2023 | US$ 3 999 | amazon.com | |
| 11. | Nikon Zf | 4.5/5 | .. | 4.5/5 | 90/100 | 4.5/5 | 5/5 | Sep 2023 | US$ 1 999 | amazon.com | |
| 12. | Panasonic S5 II | 4.5/5 | + + | 5/5 | 90/100 | 4.5/5 | 5/5 | Jan 2023 | US$ 1 999 | amazon.com | |
| 13. | Pentax K-3 | 4/5 | .. | .. | 83/100 | 5/5 | 5/5 | Oct 2013 | US$ 1 299 | ebay.com | |
| 14. | Pentax K-3 III | 4/5 | .. | 3/5 | .. | 4.5/5 | .. | Mar 2021 | US$ 1 999 | amazon.com | |
| 15. | Pentax K-5 II | 5/5 | .. | .. | 80/100 | 5/5 | 4.5/5 | Sep 2012 | US$ 1 099 | ebay.com | |
| 16. | Pentax K-S2 | 4.5/5 | .. | .. | .. | 5/5 | 4.5/5 | Feb 2015 | US$ 749 | ebay.com | |
| 17. | Sony A9 III | 4.5/5 | .. | .. | 91/100 | .. | .. | Nov 2023 | US$ 5 999 | amazon.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Check Z6 III price at
amazon.com

Check K-3 II offers at
ebay.com
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. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon 850D vs Nikon Z6 III
- Fujifilm X100F vs Pentax K-3 II
- Fujifilm XP130 vs Pentax K-3 II
- Leica SL vs Nikon Z6 III
- Nikon D600 vs Nikon Z6 III
- Nikon D810 vs Pentax K-3 II
- Nikon Z6 III vs Nikon Zf
- Nikon Z6 III vs Sony A6100
- Nikon Z6 III vs Sony A7C II
- Panasonic GX800 vs Pentax K-3 II
- Pentax K-3 II vs Pentax K-70
- Pentax K-3 II vs Sony A5100
Specifications: Nikon Z6 III vs Pentax K-3 II
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 | Nikon Z6 III | Pentax K-3 II |
|---|---|---|
| Camera Type | Mirrorless system camera | Digital single lens reflex |
| Camera Lens | Nikon Z mount lenses | Pentax K mount lenses |
| Launch Date | June 2024 | April 2015 |
| Launch Price | USD 2,499 | USD 1,099 |
| Sensor Specs | Nikon Z6 III | Pentax K-3 II |
| Sensor Technology | BSI-CMOS | CMOS |
| Sensor Format | Full Frame Sensor | APS-C Sensor |
| Sensor Size | 35.9 x 23.9 mm | 23.5 x 15.6 mm |
| Sensor Area | 858.01 mm2 | 366.6 mm2 |
| Sensor Diagonal | 43.1 mm | 28.2 mm |
| Crop Factor | 1.0x | 1.5x |
| Sensor Resolution | 24.3 Megapixels | 24.1 Megapixels |
| Image Resolution | 6048 x 4024 pixels | 6016 x 4000 pixels |
| Pixel Pitch | 5.94 μm | 3.90 μm |
| Pixel Density | 2.84 MP/cm2 | 6.56 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | 6K/60p Video | 1080/60i Video |
| ISO Setting | 100 - 64,000 ISO | 100 - 51,200 ISO |
| ISO Boost | 50 - 204,800 ISO | no Enhancement |
| Image Processor | EXPEED 7 | PRIME III |
| DXO Sensor Quality (score) | .. | 80 |
| DXO Color Depth (bits) | .. | 23.6 |
| DXO Dynamic Range (EV) | .. | 13.6 |
| DXO Low Light (ISO) | .. | 1106 |
| Screen Specs | Nikon Z6 III | Pentax K-3 II |
| Viewfinder Type | Electronic viewfinder | Optical viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.80x | 0.63x |
| Viewfinder Resolution | 5760k 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 | 1037k dots |
| LCD Attachment | Swivel screen | Fixed screen |
| Touch Input | Touchscreen | no Touchscreen |
| Shooting Specs | Nikon Z6 III | Pentax K-3 II |
| Focus System | On-Sensor Phase-detect | Phase-detect AF |
| Manual Focusing Aid | Focus Peaking | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/8000s |
| Continuous Shooting | 14 shutter flaps/s | 8.3 shutter flaps/s |
| Shutter Life Expectancy | 200 000 actuations | 200 000 actuations |
| Electronic Shutter | up to 1/16000s | no E-Shutter |
| Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
| Image Stabilization | In-body stabilization | In-body stabilization |
| Fill Flash | no On-Board Flash | no On-Board Flash |
| Storage Medium | CFexB or SDXC cards | SDXC cards |
| Single or Dual Card Slots | Dual card slots | Dual card slots |
| UHS card support | UHS-II | UHS-I |
| Connectivity Specs | Nikon Z6 III | Pentax K-3 II |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | no PC Sync | PC Sync socket |
| USB Connector | USB 3.2 | USB 3.0 |
| HDMI Port | micro HDMI | mini HDMI |
| Microphone Port | External MIC port | External MIC port |
| Headphone Socket | Headphone port | Headphone port |
| Wifi Support | Wifi built-in | no Wifi |
| Bluetooth Support | Bluetooth built-in | no Bluetooth |
| Geotagging | no internal GPS | GPS built-in |
| Body Specs | Nikon Z6 III | Pentax K-3 II |
| Environmental Sealing | Weathersealed body | Weathersealed body |
| Battery Type | Nikon EN-EL15c | Pentax D-LI90 |
| Battery Life (CIPA) | 380 shots per charge | 720 shots per charge |
| In-Camera Charging | USB charging | no USB charging |
| Body Dimensions |
139 x 102 x 74 mm (5.5 x 4.0 x 2.9 in) |
131 x 100 x 77 mm (5.2 x 3.9 x 3.0 in) |
| Camera Weight | 670 g (23.6 oz) | 800 g (28.2 oz) |

Check Z6 III price at
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Check K-3 II offers at
ebay.com
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