Pentax K-3 III vs Sony NEX-7
The Pentax K-3 III and the Sony Alpha NEX-7 are two enthusiast cameras that were revealed to the public, respectively, in March 2021 and August 2011. The K-3 III is a DSLR, while the NEX-7 is a mirrorless interchangeable lens camera. Both cameras are equipped with an APS-C sensor. The Pentax has a resolution of 25.6 megapixels, whereas the Sony provides 24 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check K-3 III price at
amazon.com

Check NEX-7 offers at
ebay.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-3 III and the Sony Alpha NEX-7? 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 Pentax K-3 III and the Sony NEX-7. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.
The K-3 III can be obtained in two different colors (black, silver), while the NEX-7 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 Sony NEX-7 is considerably smaller (43 percent) than the Pentax K-3 III. Moreover, the NEX-7 is substantially lighter (51 percent) than the K-3 III. It is worth mentioning in this context that the K-3 III is splash and dust resistant, while the NEX-7 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 K-3 III gets 800 shots out of its Pentax D-LI90 battery, while the NEX-7 can take 430 images on a single charge of its Sony NP-FW50 power pack.
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.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Pentax K-3 III | 135 mm | 104 mm | 74 mm | 820 g | 800 | Y | Mar 2021 | US$ 1 999 | amazon.com | |
| 2. | Sony NEX-7 | 120 mm | 67 mm | 43 mm | 400 g | 430 | n | Aug 2011 | US$ 1 349 | ebay.com | |
| 3. | Fujifilm X-H1 | 140 mm | 97 mm | 86 mm | 673 g | 310 | Y | Feb 2018 | US$ 1 899 | ebay.com | |
| 4. | Fujifilm X-T4 | 135 mm | 93 mm | 64 mm | 607 g | 500 | Y | Feb 2020 | US$ 1 699 | ebay.com | |
| 5. | Fujifilm X100 | 126 mm | 75 mm | 54 mm | 445 g | 300 | n | Sep 2010 | US$ 1 199 | ebay.com | |
| 6. | Nikon Z6 II | 134 mm | 101 mm | 70 mm | 705 g | 410 | Y | Oct 2020 | US$ 1 999 | amazon.com | |
| 7. | Panasonic S5 | 133 mm | 98 mm | 82 mm | 714 g | 440 | Y | Sep 2020 | US$ 1 999 | amazon.com | |
| 8. | Pentax K-3 | 131 mm | 100 mm | 77 mm | 800 g | 560 | Y | Oct 2013 | US$ 1 299 | ebay.com | |
| 9. | Pentax K-3 II | 131 mm | 100 mm | 77 mm | 800 g | 720 | Y | Apr 2015 | US$ 1 099 | ebay.com | |
| 10. | Pentax K-5 II | 131 mm | 97 mm | 73 mm | 760 g | 740 | Y | Sep 2012 | US$ 1 099 | ebay.com | |
| 11. | Pentax K-70 | 126 mm | 93 mm | 74 mm | 688 g | 410 | Y | Jun 2016 | US$ 649 | ebay.com | |
| 12. | Pentax KP | 132 mm | 101 mm | 76 mm | 703 g | 390 | Y | Jan 2017 | US$ 1 099 | ebay.com | |
| 13. | Pentax K-S2 | 123 mm | 91 mm | 73 mm | 678 g | 410 | Y | Feb 2015 | US$ 749 | ebay.com | |
| 14. | Sony A3000 | 128 mm | 91 mm | 85 mm | 411 g | 470 | n | Aug 2013 | US$ 329 | ebay.com | |
| 15. | Sony A6000 | 120 mm | 67 mm | 45 mm | 344 g | 360 | n | Feb 2014 | US$ 599 | ebay.com | |
| 16. | Sony A6400 | 120 mm | 67 mm | 50 mm | 403 g | 410 | Y | Jan 2019 | US$ 899 | amazon.com | |
| 17. | Sony RX1 | 113 mm | 65 mm | 70 mm | 482 g | 270 | n | Sep 2012 | US$ 2 799 | ebay.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 NEX-7 was launched at a markedly lower price (by 33 percent) than the K-3 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. 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 imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the NEX-7 is 1 percent bigger. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a slightly smaller sensor, the Pentax K-3 III offers a higher resolution of 25.6 megapixels, compared with 24 MP of the Sony NEX-7. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 3.90μm for the NEX-7). However, it should be noted that the K-3 III is much more recent (by 9 years and 7 months) than the NEX-7, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the K-3 III has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
Unlike the NEX-7, 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 Pentax K-3 III has a native sensitivity range from ISO 100 to ISO 160000. The corresponding ISO settings for the Sony Alpha NEX-7 are ISO 100 to ISO 16000 (no boost).
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

For many cameras, data on sensor performance has been reported by DXO Mark. This service 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Pentax K-3 III | APS-C | 25.6 | 6192 | 4128 | 4K/30p | 24.2 | 13.7 | 2083 | 85 | |
| 2. | Sony NEX-7 | APS-C | 24.0 | 6000 | 4000 | 1080/60i | 24.1 | 13.4 | 1016 | 81 | |
| 3. | Fujifilm X-H1 | APS-C | 24.0 | 6000 | 4000 | 4K/30p | 24.0 | 13.3 | 1806 | 82 | |
| 4. | Fujifilm X-T4 | APS-C | 26.0 | 6240 | 4160 | 4K/60p | 24.1 | 13.6 | 1995 | 84 | |
| 5. | Fujifilm X100 | APS-C | 12.2 | 4288 | 2848 | 720/30p | 22.9 | 12.4 | 1001 | 73 | |
| 6. | Nikon Z6 II | Full Frame | 24.3 | 6048 | 4024 | 4K/60p | 25.0 | 14.4 | 3303 | 94 | |
| 7. | Panasonic S5 | Full Frame | 24.0 | 6000 | 4000 | 4K/60p | 25.1 | 14.5 | 2697 | 94 | |
| 8. | Pentax K-3 | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.7 | 13.4 | 1216 | 80 | |
| 9. | Pentax K-3 II | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.6 | 13.6 | 1106 | 80 | |
| 10. | Pentax K-5 II | APS-C | 16.1 | 4928 | 3264 | 1080/25p | 23.8 | 14.1 | 1235 | 82 | |
| 11. | Pentax K-70 | APS-C | 24.0 | 6000 | 4000 | 1080/60i | 23.8 | 13.1 | 1639 | 80 | |
| 12. | Pentax KP | APS-C | 24.1 | 6016 | 4000 | 1080/60i | 23.9 | 13.2 | 1699 | 81 | |
| 13. | Pentax K-S2 | APS-C | 20.0 | 5472 | 3648 | 1080/30p | 23.6 | 12.9 | 1514 | 79 | |
| 14. | Sony A3000 | APS-C | 19.8 | 5456 | 3632 | 1080/60i | 23.7 | 12.8 | 1068 | 78 | |
| 15. | Sony A6000 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.1 | 13.1 | 1347 | 82 | |
| 16. | Sony A6400 | APS-C | 24.0 | 6000 | 4000 | 4K/30p | 24.0 | 13.6 | 1431 | 83 | |
| 17. | Sony RX1 | Full Frame | 24.0 | 6000 | 4000 | 1080/60p | 25.1 | 14.3 | 2534 | 93 | |
| 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 can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the K-3 III provides a higher video resolution than the NEX-7. It can shoot video footage at 4K/30p, while the Sony is limited to 1080/60i.
Feature comparison
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the NEX-7 has an electronic viewfinder (2359k 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 NEX-7 has a higher magnification than the one of the K-3 III (0.73x 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-3 III and Sony NEX-7 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. | Pentax K-3 III | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 12.0/s | n | Y | |
| 2. | Sony NEX-7 | 2359 | n | 3.0 / 921 | tilting | n | 1/4000s | 10.0/s | Y | n | |
| 3. | Fujifilm X-H1 | 3690 | Y | 3.0 / 1040 | full-flex | Y | 1/8000s | 14.0/s | n | Y | |
| 4. | Fujifilm X-T4 | 3690 | n | 3.0 / 1620 | swivel | Y | 1/8000s | 15.0/s | n | Y | |
| 5. | Fujifilm X100 | 1440 | n | 2.8 / 460 | fixed | n | 1/4000s | 5.0/s | Y | n | |
| 6. | Nikon Z6 II | 3690 | Y | 3.2 / 2100 | tilting | Y | 1/8000s | 14.0/s | n | Y | |
| 7. | Panasonic S5 | 2360 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 7.0/s | n | Y | |
| 8. | Pentax K-3 | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | Y | Y | |
| 9. | Pentax K-3 II | optical | Y | 3.2 / 1037 | fixed | n | 1/8000s | 8.3/s | n | Y | |
| 10. | Pentax K-5 II | optical | Y | 3.0 / 921 | fixed | n | 1/8000s | 7.0/s | Y | Y | |
| 11. | Pentax K-70 | optical | n | 3.0 / 921 | swivel | n | 1/6000s | 6.0/s | Y | Y | |
| 12. | Pentax KP | optical | n | 3.0 / 921 | tilting | n | 1/6000s | 7.0/s | Y | Y | |
| 13. | Pentax K-S2 | optical | n | 3.0 / 921 | swivel | n | 1/6000s | 5.4/s | Y | Y | |
| 14. | Sony A3000 | 202 | n | 3.0 / 230 | fixed | n | 1/4000s | 2.5/s | Y | n | |
| 15. | Sony A6000 | 1440 | n | 3.0 / 922 | tilting | n | 1/4000s | 11.0/s | Y | n | |
| 16. | Sony A6400 | 2359 | n | 3.0 / 922 | tilting | Y | 1/4000s | 11.0/s | Y | n | |
| 17. | Sony RX1 | optional | n | 3.0 / 1229 | fixed | n | 1/4000s | 5.0/s | Y | n | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that is present on the K-3 III, but is missing on the NEX-7 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 Pentax K-3 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 K-3 III writes its imaging data to SDXC cards, while the NEX-7 uses SDXC or Memory Stick PRO Duo cards. The K-3 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the NEX-7 only has one slot. The K-3 III supports UHS-II cards on its first slot and UHS-I on its second one, while the NEX-7 cannot take advantage of Ultra High Speed SD cards.
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-3 III and Sony Alpha NEX-7 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. | Pentax K-3 III | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 2. | Sony NEX-7 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
| 3. | Fujifilm X-H1 | Y | stereo / mono | Y | - | micro | 3.0 | Y | - | - | |
| 4. | Fujifilm X-T4 | Y | stereo / mono | Y | - | micro | 3.1 | Y | - | Y | |
| 5. | Fujifilm X100 | Y | stereo / - | - | - | mini | 2.0 | - | - | - | |
| 6. | Nikon Z6 II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 7. | Panasonic S5 | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 8. | Pentax K-3 | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
| 9. | Pentax K-3 II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
| 10. | Pentax K-5 II | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - | |
| 11. | Pentax K-70 | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
| 12. | Pentax KP | Y | stereo / mono | Y | - | - | 2.0 | Y | - | - | |
| 13. | Pentax K-S2 | Y | mono / mono | Y | - | micro | 2.0 | Y | Y | - | |
| 14. | Sony A3000 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 15. | Sony A6000 | Y | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
| 16. | Sony A6400 | Y | stereo / mono | Y | - | micro | 2.0 | Y | Y | Y | |
| 17. | Sony RX1 | Y | stereo / mono | Y | - | mini | 2.0 | - | - | - |
It is notable that the K-3 III has a headphone jack, which is not present on the NEX-7 This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.
Studio photographers will appreciate that the Pentax K-3 III (unlike the NEX-7) 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 NEX-7 has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the NEX-7 from Sony. Further information on the features and operation of the K-3 III and NEX-7 can be found, respectively, in the Pentax K-3 III Manual (free pdf) or the online Sony NEX-7 Manual.
Review summary
So what conclusions can be drawn? Which of the two cameras – the Pentax K-3 III or the Sony NEX-7 – 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.

Advantages of the Pentax K-3 III:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- High quality composites: Can combine several shots after pixel-shifting its sensor.
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- 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 detailed LCD: Has a higher resolution rear screen (1620k 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 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Can take more shots (800 versus 430) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Faster data transfer: Supports a more advanced USB protocol (3.2 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.
- Faster buffer clearing: Supports Ultra High Speed (UHS-II and UHS-I) SDXC cards.
- More modern: Reflects 9 years and 7 months of technical progress since the NEX-7 launch.

Reasons to prefer the Sony Alpha NEX-7:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More framing info: Has an electronic viewfinder that displays shooting data.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.70x).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- More compact: Is smaller (120x67mm vs 135x104mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 420g or 51 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was introduced into a lower priced category (33 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in August 2011).
If the count of relative strengths (bullet points above) is taken as a measure, the K-3 III is the clear winner of the match-up (23 : 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.
How about other alternatives? Do the specifications of the Pentax K-3 III and the Sony NEX-7 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 says little about, for example, the shooting experience and imaging performance of the K-3 III and the NEX-7 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], 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. | Pentax K-3 III | 4/5 | .. | 3/5 | .. | 4.5/5 | .. | Mar 2021 | US$ 1 999 | amazon.com | |
| 2. | Sony NEX-7 | 5/5 | + + | .. | 81/100 | 4.5/5 | 5/5 | Aug 2011 | US$ 1 349 | ebay.com | |
| 3. | Fujifilm X-H1 | .. | + | 5/5 | 86/100 | 4.5/5 | 4.5/5 | Feb 2018 | US$ 1 899 | ebay.com | |
| 4. | Fujifilm X-T4 | 5/5 | + + | 5/5 | 88/100 | 5/5 | 5/5 | Feb 2020 | US$ 1 699 | ebay.com | |
| 5. | Fujifilm X100 | 3/5 | .. | .. | 75/100 | 4/5 | 5/5 | Sep 2010 | US$ 1 199 | ebay.com | |
| 6. | Nikon Z6 II | 4.5/5 | .. | 4/5 | 89/100 | 4.5/5 | 4.5/5 | Oct 2020 | US$ 1 999 | amazon.com | |
| 7. | Panasonic S5 | 4.5/5 | + + | 4.5/5 | 88/100 | 4.5/5 | 4.5/5 | Sep 2020 | US$ 1 999 | amazon.com | |
| 8. | Pentax K-3 | 4/5 | .. | .. | 83/100 | 5/5 | 5/5 | Oct 2013 | US$ 1 299 | ebay.com | |
| 9. | Pentax K-3 II | 4.5/5 | .. | .. | .. | 5/5 | 5/5 | Apr 2015 | US$ 1 099 | ebay.com | |
| 10. | Pentax K-5 II | 5/5 | .. | .. | 80/100 | 5/5 | 4.5/5 | Sep 2012 | US$ 1 099 | ebay.com | |
| 11. | Pentax K-70 | 4.5/5 | .. | 4/5 | 79/100 | 4.5/5 | 4.5/5 | Jun 2016 | US$ 649 | ebay.com | |
| 12. | Pentax KP | 4/5 | .. | 3/5 | 82/100 | 5/5 | 4.5/5 | Jan 2017 | US$ 1 099 | ebay.com | |
| 13. | Pentax K-S2 | 4.5/5 | .. | .. | .. | 5/5 | 4.5/5 | Feb 2015 | US$ 749 | ebay.com | |
| 14. | Sony A3000 | 3/5 | + | .. | .. | 4/5 | 4/5 | Aug 2013 | US$ 329 | ebay.com | |
| 15. | Sony A6000 | 5/5 | + | 4.5/5 | 80/100 | 4.5/5 | 5/5 | Feb 2014 | US$ 599 | ebay.com | |
| 16. | Sony A6400 | 4/5 | + | 4/5 | 85/100 | 4.5/5 | 4/5 | Jan 2019 | US$ 899 | amazon.com | |
| 17. | Sony RX1 | 5/5 | .. | .. | 79/100 | 4/5 | 4.5/5 | Sep 2012 | US$ 2 799 | ebay.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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, please note that some of the review sites have changed their methodology and reporting over time.

Check K-3 III price at
amazon.com

Check NEX-7 offers at
ebay.com
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.
- Canon M200 vs Pentax K-3 III
- Nikon D1 vs Sony NEX-7
- Nikon D70 vs Sony NEX-7
- Nikon D7000 vs Pentax K-3 III
- Olympus E-M5 vs Sony NEX-7
- Olympus E-PL7 vs Sony NEX-7
- Panasonic G100 vs Pentax K-3 III
- Panasonic LX100 II vs Pentax K-3 III
- Pentax K-1 vs Pentax K-3 III
- Pentax K-3 III vs Ricoh WG-6
- Ricoh GR II vs Sony NEX-7
- Samsung NX1 vs Sony NEX-7
Specifications: Pentax K-3 III vs Sony NEX-7
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 | Pentax K-3 III | Sony NEX-7 |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Pentax K mount lenses | Sony E mount lenses |
| Launch Date | March 2021 | August 2011 |
| Launch Price | USD 1,999 | USD 1,349 |
| Sensor Specs | Pentax K-3 III | Sony NEX-7 |
| Sensor Technology | CMOS | CMOS |
| Sensor Format | APS-C Sensor | APS-C Sensor |
| Sensor Size | 23.3 x 15.5 mm | 23.4 x 15.6 mm |
| Sensor Area | 361.15 mm2 | 365.04 mm2 |
| Sensor Diagonal | 28 mm | 28.1 mm |
| Crop Factor | 1.5x | 1.5x |
| Sensor Resolution | 25.6 Megapixels | 24 Megapixels |
| Image Resolution | 6192 x 4128 pixels | 6000 x 4000 pixels |
| Pixel Pitch | 3.76 μm | 3.90 μm |
| Pixel Density | 7.08 MP/cm2 | 6.57 MP/cm2 |
| Moiré control | no AA filter | Anti-Alias filter |
| Movie Capability | 4K/30p Video | 1080/60i Video |
| ISO Setting | 100 - 160,000 ISO | 100 - 16,000 ISO |
| Image Processor | PRIME V | BIONZ |
| DXO Sensor Quality (score) | .. | 81 |
| DXO Color Depth (bits) | .. | 24.1 |
| DXO Dynamic Range (EV) | .. | 13.4 |
| DXO Low Light (ISO) | .. | 1016 |
| Screen Specs | Pentax K-3 III | Sony NEX-7 |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.70x | 0.73x |
| Viewfinder Resolution | 2359k dots | |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.2inch | 3.0inch |
| LCD Resolution | 1620k dots | 921k dots |
| LCD Attachment | Fixed screen | Tilting screen |
| Touch Input | Touchscreen | no Touchscreen |
| Shooting Specs | Pentax K-3 III | Sony NEX-7 |
| Focus System | Phase-detect AF | Contrast-detect AF |
| Manual Focusing Aid | Focus Peaking | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/4000s |
| Continuous Shooting | 12 shutter flaps/s | 10 shutter flaps/s |
| Shutter Life Expectancy | 200 000 actuations | 150 000 actuations |
| Time-Lapse Photography | Intervalometer built-in | no Intervalometer |
| Image Stabilization | In-body stabilization | Lens stabilization only |
| Fill Flash | no On-Board Flash | Built-in Flash |
| Storage Medium | SDXC cards | MS or SDXC cards |
| Single or Dual Card Slots | Dual card slots | Single card slot |
| UHS card support | Single UHS-II | no |
| Connectivity Specs | Pentax K-3 III | Sony NEX-7 |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | no PC Sync |
| USB Connector | USB 3.2 | USB 2.0 |
| HDMI Port | micro HDMI | mini HDMI |
| Microphone Port | External MIC port | External MIC port |
| 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 | Pentax K-3 III | Sony NEX-7 |
| Environmental Sealing | Weathersealed body | not weather sealed |
| Battery Type | Pentax D-LI90 | Sony NP-FW50 |
| Battery Life (CIPA) | 800 shots per charge | 430 shots per charge |
| Body Dimensions |
135 x 104 x 74 mm (5.3 x 4.1 x 2.9 in) |
120 x 67 x 43 mm (4.7 x 2.6 x 1.7 in) |
| Camera Weight | 820 g (28.9 oz) | 400 g (14.1 oz) |

Check K-3 III price at
amazon.com

Check NEX-7 offers at
ebay.com
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