PW

Pentax K-1 versus Panasonic G9

The Pentax K-1 and the Panasonic Lumix DC-G9 are two enthusiast cameras that were announced, respectively, in February 2016 and November 2017. The K-1 is a DSLR, while the G9 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (K-1) and a Four Thirds (G9) sensor. The Pentax has a resolution of 36.2 megapixel, whereas the Panasonic provides 20.2 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Pentax K-1 vs Panasonic G9

The side-by-side display below illustrates the physical size and weight of the Pentax K-1 and the Panasonic G9. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the K-1 – represents the basis or 100 percent across all the size and weight measures).

Snapsort Pentax K-1 vs Panasonic G9
Compare K-1 versus G9 top
Compare K-1 and G9 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G9 is notably smaller (12 percent) than the Pentax K-1. Moreover, the G9 is substantially lighter (35 percent) than the K-1. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the K-1 gets 760 shots out of its D-LI90 battery, while the G9 can take 400 images on a single charge of its DMW-BLF19 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Pentax K-1» 5.4 in 4.3 in 3.4 in 35.6 oz 760 Y Feb 2016 1,799- i
Panasonic G9« 5.4 in 3.8 in 3.6 in 23.2 oz 400 Y Nov 2017 1,699 i i
Canon 5D Mark IV« » 5.9 in 4.6 in 3.0 in 31.4 oz 900 Y Aug 2016 3,499 i i
Fujifilm X-H1« » 5.5 in 3.8 in 3.4 in 23.7 oz 310 Y Feb 2018 1,899 i i
Nikon D500« » 5.8 in 4.5 in 3.2 in 30.3 oz 1240 Y Jan 2016 1,999 i i
Olympus E-M1 II« » 5.3 in 3.6 in 2.6 in 20.2 oz 440 Y Sep 2016 1,999 i i
Panasonic GH5s« » 5.5 in 3.9 in 3.4 in 23.3 oz 440 Y Jan 2018 2,499 i i
Panasonic GH5« » 5.5 in 3.9 in 3.4 in 25.6 oz 410 Y Jan 2017 1,999 i i
Panasonic G85« » 5.0 in 3.5 in 2.9 in 17.8 oz 330 Y Sep 2016 899 i i
Pentax K-1 II« » 5.4 in 4.3 in 3.4 in 35.6 oz 670 Y Feb 2018 1,999 i i
Pentax K-3 II« » 5.2 in 3.9 in 3.0 in 28.2 oz 720 Y Apr 2015 1,099 i i
Sony A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i
Sony A99 II« » 5.6 in 4.1 in 3.0 in 29.9 oz 490 Y Sep 2016 3,199 i i
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i
Sony A850« » 6.1 in 4.6 in 3.2 in 31.6 oz 880 Y Aug 2009 1,999- i

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The G9 was somewhat cheaper (by 6 percent) than the K-1 at launch, but both cameras fall into the same price category. 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: Pentax K-1 vs Panasonic G9

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Pentax K-1 features a full frame sensor and the Panasonic G9 a Four Thirds sensor. The sensor area in the G9 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the K-1 has a native 3:2 aspect ratio, while the one in the G9 offers a 4:3 aspect.

Pentax K-1 and Panasonic G9 sensor measures

With 36.2MP, the K-1 offers a higher resolution than the G9 (20.2MP), but the K-1 nevertheless has larger individual pixels (pixel pitch of 4.88μm versus 3.34μm for the G9) due to its larger sensor. However, the G9 is a somewhat more recent model (by 1 year and 8 months) than the K-1, and its sensor might have benefitted from technological advances during this time that 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.

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).

K-1 versus G9 MP

For most cameras, data on sensor performance has been reported by DXO Mark. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Pentax K-1» Full Frame 36.2 7360 49121080/60i25.414.6328096
Panasonic G9« Four Thirds 20.2 5184 38884K/60p----
Canon 5D Mark IV« » Full Frame 30.1 6720 44804K/30p24.813.6299591
Fujifilm X-H1« » APS-C 24.0 6000 40004K/30p----
Nikon D500« » APS-C 20.7 5568 37124K/30p24.014.0132483
Olympus E-M1 II« » Four Thirds 20.2 5184 38884K/30p23.712.8131280
Panasonic GH5s« » Four Thirds 9.9 3680 27004K/60p----
Panasonic GH5« » Four Thirds 20.2 5184 38884K/60p23.913.080777
Panasonic G85« » Four Thirds 15.8 4592 34484K/30p22.812.565671
Pentax K-1 II« » Full Frame 36.2 7360 49121080/60i----
Pentax K-3 II« » APS-C 24.1 6016 40001080/60i23.613.6110680
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100
Sony A99 II« » Full Frame 42.2 7952 53044K/30p25.413.4231792
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498
Sony A850« » Full Frame 24.4 6048 4032-23.812.2141579

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 G9 provides a better video resolution than the K-1. It can shoot movie footage at 4K/60p, while the Pentax is limited to 1080/60i.

 

Feature comparison: Pentax K-1 vs Panasonic G9

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the G9 has an electronic viewfinder (3680k dots), while the K-1 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Pentax K-1 and Panasonic G9 in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

Core Features
  Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Pentax K-1»optical Y 3.2 1037 full-flex n 8000 4.4 n Y
Panasonic G9«3680 Y 3.0 1040 swivel Y 8000 20.0 n Y
Canon 5D Mark IV« »optical Y 3.2 1620 fixed Y 8000 7.0 n n
Fujifilm X-H1« »3690 Y 3.0 1040 full-flex Y 8000 14.0 n Y
Nikon D500« »optical Y 3.2 2359 tilting Y 8000 10.0 n n
Olympus E-M1 II« »2360 n 3.0 1037 swivel Y 8000 18.0 n Y
Panasonic GH5s« »3680 n 3.2 1620 swivel Y 8000 12.0 n n
Panasonic GH5« »3680 n 3.2 1620 swivel Y 8000 12.0 n Y
Panasonic G85« »2360 n 3.0 1040 swivel Y 4000 9.0 Y Y
Pentax K-1 II« »optical Y 3.2 1037 full-flex n 8000 4.4 n Y
Pentax K-3 II« »optical Y 3.2 1037 fixed n 8000 8.3 n Y
Sony A7R III« »3686 n 3.0 1440 tilting Y 8000 10.0 n Y
Sony A99 II« »2400 Y 3.0 1229 full-flex n 8000 12.0 n Y
Sony A7R II« »2400 n 3.0 1229 tilting n 8000 5.0 n Y
Sony A850« »optical Y 3.0 922 fixed n 8000 3.0 n Y

The G9 is a current model that online retailers, such as amazon, will have in stock. In contrast, the K-1 has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the K-1 was succeeded by the Pentax K-1 II.

Review summary: Pentax K-1 vs Panasonic G9

So what is the bottom line? Is there a clear favorite between the Pentax K-1 and the Panasonic G9? The listing below highlights the relative strengths of the two models.

ilogo

Reasons to prefer the Pentax K-1:

  • More detail: Offers more megapixels (36.2 vs 20.2MP) with a 37% higher linear resolution.
  • Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • Longer lasting: Can take more shots (760 versus 400) on a single battery charge.
  • More heavily discounted: Has been on the market for longer (launched in February 2016).

ilogo

Advantages of the Panasonic Lumix DC-G9:

  • Better video: Provides higher definition movie capture (4K/60p vs 1080/60i).
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (20 vs 4.4 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (137x97mm vs 137x110mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 352g or 35 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • More modern: Was introduced somewhat (1 year and 8 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the G9 emerges as the winner of the match-up (8 : 6 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.

K-1 06:08 G9

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the K-1 and the G9 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why hands-on reviews by experts are important. The table below summarizes the assessments of some of the best known camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The full reviews are available by clicking on the site logo in the table header.

Review scores
  Camera cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Pentax K-1»-84/1005/54.5/55/5 Feb 2016 1,799- i
Panasonic G9«HiRec85/1005/5-5/5 Nov 2017 1,699 i i
Canon 5D Mark IV« »HiRec87/1004.5/55/54.5/5 Aug 2016 3,499 i i
Fujifilm X-H1« »Rec86/1004.5/5-4.5/5 Feb 2018 1,899 i i
Nikon D500« »HiRec91/1004.5/55/55/5 Jan 2016 1,999 i i
Olympus E-M1 II« »HiRec85/1004.5/55/54.5/5 Sep 2016 1,999 i i
Panasonic GH5s« »-84/1004.5/5-4.5/5 Jan 2018 2,499 i i
Panasonic GH5« »HiRec85/1004.5/55/55/5 Jan 2017 1,999 i i
Panasonic G85« »HiRec84/1005/54.5/54.5/5 Sep 2016 899 i i
Pentax K-1 II« »-79/1004.5/5-4.5/5 Feb 2018 1,999 i i
Pentax K-3 II« »--5/54.5/55/5 Apr 2015 1,099 i i
Sony A7R III« »HiRec90/1004.5/55/55/5 Oct 2017 3,199 i i
Sony A99 II« »-85/1004.5/54.5/54.5/5 Sep 2016 3,199 i i
Sony A7R II« »HiRec90/1005/54.5/55/5 Jun 2015 3,199- i
Sony A850« »-75/100-4/54.5/5 Aug 2009 1,999- i

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

 

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If you do not see the camera that you are looking for, please send me an email, and I will try to add information on that model to the database.

vs

    You are here  »   »