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Panasonic GH3 vs Pentax K-3 III

The Panasonic Lumix DMC-GH3 and the Pentax K-3 III are two enthusiast cameras that were announced, respectively, in September 2012 and March 2021. The GH3 is a mirrorless interchangeable lens camera, while the K-3 III is a DSLR. The cameras are based on a Four Thirds (GH3) and an APS-C (K-3 III) sensor. The Panasonic has a resolution of 15.9 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
Panasonic GH3
versus
Pentax K-3 III
Panasonic GH3   Pentax K-3 III
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Pentax K mount lenses
15.9 MP – Four Thirds sensor 25.6 MP – APS-C sensor
1080/60p Video 4K/30p Video
ISO 200-12,800 (125 - 25,600) ISO 100-160,000
Electronic viewfinder (1746k dots) Optical viewfinder
3.0" LCD – 614k dots 3.2" LCD – 1620k dots
Swivel touchscreen Fixed touchscreen
6 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
540 shots per battery charge800 shots per battery charge
133 x 93 x 82 mm, 550 g 135 x 104 x 74 mm, 820 g
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Check K-3 III price at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-GH3 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 side-by-side display below illustrates the physical size and weight of the Panasonic GH3 and the Pentax K-3 III. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

The K-3 III can be obtained in two different colors (black, silver), while the GH3 is only available in black.

Size Panasonic GH3 vs Pentax K-3 III
Compare GH3 versus K-3 III top
Comparison GH3 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 notably larger (14 percent) than the Panasonic GH3. Moreover, the K-3 III is substantially heavier (49 percent) than the GH3. 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 GH3 gets 540 shots out of its Panasonic DMW-BLF19 battery, while the K-3 III can take 800 images on a single charge of its Pentax D-LI90 power pack.

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.

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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.
 
Panasonic GH3 133 mm 93 mm 82 mm 550 g 540 Y Sep 2012 1,299ebay.com
2.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 amazon.com
3.
 
Fujifilm X-H1 140 mm 97 mm 86 mm 673 g 310 Y Feb 2018 1,899ebay.com
4.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
5.
 
Olympus E-M5 122 mm 89 mm 43 mm 425 g 360 Y Feb 2012 1,299ebay.com
6.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099ebay.com
7.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
8.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
9.
 
Panasonic G85 128 mm 89 mm 74 mm 505 g 330 Y Sep 2016 899ebay.com
10.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
11.
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 1,499ebay.com
12.
 
Panasonic GM1 99 mm 55 mm 30 mm 204 g 230 n Oct 2013 749ebay.com
13.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
14.
 
Pentax K-3 131 mm 100 mm 77 mm 800 g 560 Y Oct 2013 1,299ebay.com
15.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099ebay.com
16.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649ebay.com
17.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099ebay.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 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 GH3 was launched at a markedly lower price (by 35 percent) than the K-3 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Panasonic GH3 features a Four Thirds sensor and the Pentax K-3 III an APS-C sensor. The sensor area in the K-3 III is 60 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the GH3 has a native 4:3 aspect ratio, while the one in the K-3 III offers a 3:2 aspect.

Panasonic GH3 and Pentax K-3 III sensor measures

With 25.6MP, the K-3 III offers a higher resolution than the GH3 (15.9MP), but the K-3 III nevertheless has the same individual pixel size (pixel pitch of 3.76μm) as the GH3 due to its larger sensor. Moreover, the K-3 III is a much more recent model (by 8 years and 6 months) than the GH3, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. 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.

The resolution advantage of the Pentax K-3 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-3 III for good quality output (200 dots per inch) amounts to 31 x 20.6 inches or 78.6 x 52.4 cm, for very good quality (250 dpi) 24.8 x 16.5 inches or 62.9 x 41.9 cm, and for excellent quality (300 dpi) 20.6 x 13.8 inches or 52.4 x 35 cm. The corresponding values for the Panasonic GH3 are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.

Unlike the GH3, 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 Panasonic Lumix DMC-GH3 has a native sensitivity range from ISO 200 to ISO 12800, which can be extended to ISO 125-25600. The corresponding ISO settings for the Pentax K-3 III are ISO 100 to ISO 160000 (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.

GH3 versus K-3 III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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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.
 
Panasonic GH3 Four Thirds 15.9 4608 34561080/60p22.712.481271
2.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
3.
 
Fujifilm X-H1 APS-C 24.0 6000 40004K/30p24.013.3180682
4.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
5.
 
Olympus E-M5 Four Thirds 15.9 4608 34561080/60i22.812.382671
6.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
7.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
8.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
9.
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671
10.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
11.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
12.
 
Panasonic GM1 Four Thirds 15.8 4592 34481080/60i22.311.766066
13.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
14.
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
15.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
16.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
17.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the K-3 III provides a better video resolution than the GH3. It can shoot movie footage at 4K/30p, while the Panasonic is limited to 1080/60p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the GH3 has an electronic viewfinder (1746k 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 K-3 III has a higher magnification than the one of the GH3 (0.70x vs 0.67x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Panasonic GH3, the Pentax K-3 III, and comparable 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.
 
Panasonic GH31746 n3.0 / 614 swivel Y 1/4000s 6.0/s Y n
2.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
3.
 
Fujifilm X-H13690 Y3.0 / 1040 full-flex Y 1/8000s 14.0/s n Y
4.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
5.
 
Olympus E-M51440 n3.0 / 610 tilting Y 1/4000s 9.0/s n Y
6.
 
Olympus E-M5 II2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
7.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
8.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
9.
 
Panasonic G852360 n3.0 / 1040 swivel Y 1/4000s 9.0/s Y Y
10.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
11.
 
Panasonic GH42359 n3.0 / 1036 swivel Y 1/8000s 12.0/s Y n
12.
 
Panasonic GM1none n3.0 / 1036 fixed Y 1/500s 5.0/s Y n
13.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
14.
 
Pentax K-3optical Y3.2 / 1037 fixed n 1/8000s 8.3/s Y Y
15.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
16.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
17.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The GH3 has one, while the K-3 III does not. While the built-in flash of the GH3 is not very powerful, it can at times be useful as a fill-in light.

The GH3 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 III 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 GH3 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 Panasonic GH3 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.

Concerning the storage of imaging data, both the GH3 and the K-3 III write their files to SDXC cards. The K-3 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the GH3 only has one slot. The K-3 III supports UHS-II cards (on its first slot), while the GH3 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 Panasonic Lumix DMC-GH3 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.
 
Panasonic GH3Ystereo / monoYYmini2.0Y--
2.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
3.
 
Fujifilm X-H1Ystereo / monoY-micro3.0Y--
4.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
5.
 
Olympus E-M5Ystereo / mono--mini2.0---
6.
 
Olympus E-M5 IIYstereo / monoY-micro2.0Y--
7.
 
Panasonic G5Ystereo / mono--mini2.0---
8.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
9.
 
Panasonic G85Ystereo / monoY-micro2.0Y--
10.
 
Panasonic GH2Ystereo / monoY-mini2.0---
11.
 
Panasonic GH4Ystereo / monoYYmicro2.0YY-
12.
 
Panasonic GM1-stereo / mono--micro2.0Y--
13.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
14.
 
Pentax K-3Ymono / monoYYmini3.0---
15.
 
Pentax K-3 IIYmono / monoYYmini3.0---
16.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
17.
 
Pentax KPYstereo / monoY--2.0Y--

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-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 GH3 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the GH3 was succeeded by the Panasonic GH4. Further information on the features and operation of the GH3 and K-3 III can be found, respectively, in the Panasonic GH3 Manual (free pdf) or the online Pentax K-3 III Manual.

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Review summary

So how do things add up? Is the Panasonic GH3 better than the Pentax K-3 III or vice versa? The listing below highlights the relative strengths of the two models.

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Arguments in favor of the Panasonic Lumix DMC-GH3:

  • 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.
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (133x93mm vs 135x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 270g or 33 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (35 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in September 2012).

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Reasons to prefer the Pentax K-3 III:

  • More detail: Has more megapixels (25.6 vs 15.9MP), which boosts linear resolution by 29%.
  • 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 image quality: Is equipped with a larger and more technologically advanced 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 (4K/30p vs 1080/60p).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.67x).
  • Easier setting verification: Features a control panel on top to check 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 614k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 6 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (800 versus 540) out of a single battery charge.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • 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 wireless transfer: Supports Bluetooth for image sharing without cables.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 8 years and 6 months of technical progress since the GH3 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the K-3 III is the clear winner of the contest (23 : 11 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

GH3 11:23 K-3 III

How about other alternatives? Do the specifications of the Panasonic GH3 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the GH3 and the K-3 III in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

Expert reviews

This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major 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.

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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.
 
Panasonic GH35/5+ +..79/1004.5/54.5/5 Sep 2012 1,299ebay.com
2.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 amazon.com
3.
 
Fujifilm X-H1..+5/586/1004.5/54.5/5 Feb 2018 1,899ebay.com
4.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
5.
 
Olympus E-M54/5+ +..80/1004.5/55/5 Feb 2012 1,299ebay.com
6.
 
Olympus E-M5 II5/5+ +4.5/581/1005/55/5 Feb 2015 1,099ebay.com
7.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
8.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
9.
 
Panasonic G85..+ +..84/1005/54.5/5 Sep 2016 899ebay.com
10.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
11.
 
Panasonic GH45/5+ +..85/1005/55/5 Feb 2014 1,499ebay.com
12.
 
Panasonic GM13/5+..78/1005/54.5/5 Oct 2013 749ebay.com
13.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
14.
 
Pentax K-34/5....83/1005/55/5 Oct 2013 1,299ebay.com
15.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099ebay.com
16.
 
Pentax K-704.5/5..4/579/1004.5/54.5/5 Jun 2016 649ebay.com
17.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Panasonic GH3 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 Panasonic GH3 Pentax K-3 III
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Pentax K mount lenses
    Launch Date September 2012 March 2021
    Launch Price USD 1,299 USD 1,999
    Sensor Specs Panasonic GH3 Pentax K-3 III
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor APS-C Sensor
    Sensor Size 17.3 x 13.0 mm 23.3 x 15.5 mm
    Sensor Area 224.9 mm2 361.15 mm2
    Sensor Diagonal 21.6 mm 28 mm
    Crop Factor 2.0x 1.5x
    Sensor Resolution 15.9 Megapixels 25.6 Megapixels
    Image Resolution 4608 x 3456 pixels 6192 x 4128 pixels
    Pixel Pitch 3.76 μm 3.76 μm
    Pixel Density 7.08 MP/cm2 7.08 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability 1080/60p Video 4K/30p Video
    ISO Setting 200 - 12,800 ISO 100 - 160,000 ISO
    ISO Boost 125 - 25,600 ISO no Enhancement
    Image Processor Venus VII FHD PRIME V
    DXO Sensor Quality (score) 71 ..
    DXO Color Depth (bits) 22.7 ..
    DXO Dynamic Range (EV) 12.4 ..
    DXO Low Light (ISO) 812 ..
    Screen Specs Panasonic GH3 Pentax K-3 III
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.67x 0.70x
    Viewfinder Resolution 1746k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 614k dots 1620k dots
    LCD Attachment Swivel screen Fixed screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Panasonic GH3 Pentax K-3 III
    Focus System Contrast-detect AF Phase-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 6 shutter flaps/s 12 shutter flaps/s
    Electronic ShutterYESno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium SDXC cards SDXC cards
    Single or Dual Card Slots Single card slot Dual card slots
    UHS card support UHS-I Single UHS-II
    Connectivity Specs Panasonic GH3 Pentax K-3 III
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.2
    HDMI Port mini 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 no Bluetooth Bluetooth built-in
    Geotagging no internal GPS GPS built-in
    Body Specs Panasonic GH3 Pentax K-3 III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Panasonic DMW-BLF19 Pentax D-LI90
    Battery Life (CIPA)540 shots per charge800 shots per charge
    Body Dimensions 133 x 93 x 82 mm
    (5.2 x 3.7 x 3.2 in)
    135 x 104 x 74 mm
    (5.3 x 4.1 x 2.9 in)
    Camera Weight 550 g (19.4 oz) 820 g (28.9 oz)
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