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Panasonic GX8 versus Panasonic ZS100

The Panasonic Lumix DMC-GX8 and the Panasonic Lumix DMC-ZS100 (called Panasonic TZ100 in some regions) are two digital cameras that were revealed to the public, respectively, in July 2015 and January 2016. The GX8 is a mirrorless interchangeable lens camera, while the ZS100 is a fixed lens compact. The cameras are based on a Four Thirds (GX8) and an one-inch sensor. The GX8 has a resolution of 20.2 megapixel, whereas the ZS100 provides 20 MP.

Body comparison

An illustration of the physical size and weight of the Panasonic GX8 and the Panasonic ZS100 is provided in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth measures 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 GX8 – represents 100 percent across all the size and weight measures).

Panasonic GX8 vs Panasonic ZS100 front
GX8 versus ZS100 top view
GX8 and ZS100 rear side
Body view (GX8 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic ZS100 is notably smaller (30 percent) than the Panasonic GX8. Cameras that are aimed at professionals or semi-pros tend to be a bit bulkier in order to give them the necessary environmental and shock resistance. It is worth mentioning in this context that the GX8 is splash and dust resistant, while the ZS100 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the ZS100 has a lens build in, whereas the GX8 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the GX8 and their specifications in the Micro Four Thirds Lens Catalog.

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 comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX8 (⇒ rgt) 5.2 in 3.1 in 2.5 in 17.2 oz 330 YES 2015 1,199 latest check
Panasonic ZS100 (⇒ lft) 4.4 in 2.6 in 1.7 in 11.0 oz 300 no 2016 699 latest check
Canon 80D (⇒ lft | rgt) 5.5 in 4.1 in 3.1 in 25.8 oz 960 YES 2016 1,199 latest check
Canon M3 (⇒ lft | rgt) 4.4 in 2.7 in 1.7 in 12.9 oz 250 no 2015 679discont. check
Leica Q Typ 116 (⇒ lft | rgt) 5.1 in 3.1 in 3.7 in 22.6 oz .. no 2015 4,249 latest check
Olympus E-M1 II (⇒ lft | rgt) 5.3 in 3.6 in 2.6 in 20.2 oz 440 YES 2016 1,999 latest check
Olympus PEN-F (⇒ lft | rgt) 4.9 in 2.8 in 1.5 in 15.1 oz 330 no 2016 1,199 latest check
Olympus E-M5 II (⇒ lft | rgt) 4.9 in 3.3 in 1.8 in 16.5 oz 310 YES 2015 1,099 latest check
Panasonic GH5 (⇒ lft | rgt) 5.5 in 3.9 in 3.4 in 25.6 oz 410 YES 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) 5.0 in 3.5 in 2.9 in 17.8 oz 330 YES 2016 899 latest check
Panasonic GX85 (⇒ lft | rgt) 4.8 in 2.8 in 1.7 in 15.0 oz 290 no 2016 799 latest check
Panasonic LX10 (⇒ lft | rgt) 4.2 in 2.4 in 1.7 in 10.9 oz 260 no 2016 699 latest check
Panasonic GX7 (⇒ lft | rgt) 4.8 in 2.8 in 2.2 in 14.2 oz 350 no 2013 999discont. check
Pentax K-3 II (⇒ lft | rgt) 5.2 in 3.9 in 3.0 in 28.2 oz 720 YES 2015 1,099 latest check
Sony A6500 (⇒ lft | rgt) 4.7 in 2.6 in 2.1 in 16.0 oz 350 YES 2016 1,399 latest check
Sony RX100 IV (⇒ lft | rgt) 4.0 in 2.3 in 1.6 in 10.5 oz 280 no 2015 999discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The ZS100 was launched at a lower price than the GX8, despite having a lens build in. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The 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 are more costly to manufacture and tent to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GX8 features a Four Thirds sensor and the Panasonic ZS100 an one-inch sensor. The sensor area in the ZS100 is 48 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 2.7. The sensor in the GX8 has a native 4:3 aspect ratio, while the one in the ZS100 offers a 3:2 aspect.

Panasonic GX8 and Panasonic ZS100 sensor measures
Sensor size

With 20.2MP, the GX8 offers a higher resolution than the ZS100 (20MP), but the GX8 nevertheless has larger individual pixels (pixel pitch of 3.34μm versus 2.41μm for the ZS100) due to its larger sensor. However, the ZS100 is a somewhat more recent model (by 5 months) than the GX8, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels.

GX8 versus ZS100 MP
Sensor resolution

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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. Of the two cameras under review, the GX8 has a notably higher overall DXO score than the GX8 (overall score 5 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.7 bits higher color depth, 0.1 EV in additional dynamic range, and 0.5 stops in additional low light sensitivity. 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
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GX8 (⇒ rgt) Four Thirds 20.2 5184 3888 4K/30p 23.5 12.6 806 75
Panasonic ZS100 (⇒ lft) 1-inch 20.0 5472 3648 4K/30p 22.8 12.5 559 70
Canon 80D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.6 13.2 1135 79
Canon M3 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.8 11.8 1169 72
Leica Q Typ 116 (⇒ lft | rgt) Full Frame 24.0 6000 4000 1080/60p 24.3 12.7 2221 85
Olympus E-M1 II (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/30p 23.7 12.8 1312 80
Olympus PEN-F (⇒ lft | rgt) Four Thirds 20.2 5184 3888 1080/60p 23.1 12.4 894 74
Olympus E-M5 II (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 23.0 12.5 842 73
Panasonic GH5 (⇒ lft | rgt) Four Thirds 20.2 5184 3888 4K/60p 23.9 13.0 807 77
Panasonic G85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.8 12.5 656 71
Panasonic GX85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
Panasonic LX10 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p .. .. .. ..
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70
Pentax K-3 II (⇒ lft | rgt) APS-C 24.1 6016 4000 1080/60i 23.6 13.6 1106 80
Sony A6500 (⇒ lft | rgt) APS-C 24.0 6000 4000 4K/30p 24.5 13.7 1405 85
Sony RX100 IV (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.6 591 70

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GX8 offers a substantially higher resolution than the one in the ZS100 (2360k vs 1166k dots). The adjacent table lists some of the other core features of the Panasonic GX8 and Panasonic ZS100 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Panasonic GX8 (⇒ rgt) 2360 no 3.0 1040 swivel YES 8000 10.0 no YES
Panasonic ZS100 (⇒ lft) 1166 no 3.0 1040 fixed YES 2000 10.0 YES YES
Canon 80D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Canon M3 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 4.2 5 no
Leica Q Typ 116 (⇒ lft | rgt) 3680 no 3.0 1040 fixed YES 2000 10.0 no no
Olympus E-M1 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 18.0 no YES
Olympus PEN-F (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 10.0 no YES
Olympus E-M5 II (⇒ lft | rgt) 2360 no 3.0 1037 swivel YES 8000 10.0 no YES
Panasonic GH5 (⇒ lft | rgt) 3680 no 3.2 1620 swivel YES 8000 12.0 no YES
Panasonic G85 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 9.0 6.2 YES
Panasonic GX85 (⇒ lft | rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
Panasonic LX10 (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 10.0 12.1 YES
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES
Pentax K-3 II (⇒ lft | rgt) optical YES 3.2 1037 fixed no 8000 8.3 no YES
Sony A6500 (⇒ lft | rgt) 2300 no 3.0 922 tilting YES 4000 11.0 6 YES
Sony RX100 IV (⇒ lft | rgt) 2359 no 3.0 1228 tilting no 2000 16.0 10.2 no

Both the GX8 and the ZS100 are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The GX8 replaced the earlier Panasonic GX7, while the ZS100 followed on from the Panasonic ZS50.

Summary

So what is the bottom line? Is the Panasonic GX8 better than the Panasonic ZS100 or vice versa? A synthesis of the relative strong points of each of the models is listed below.


Arguments in favor of the Panasonic Lumix DMC-GX8:

  • Better image quality: Scores markedly higher (5 points) in the DXO overall assessment.
  • Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
  • More detailed viewfinder: Has a higher resolution electronic viewfinder (2360k vs 1166k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has a higher mechanical shutter speed (8000/sec vs 2000/sec) to freeze action.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • More heavily discounted: Has been on the market for longer (launched in July 2015).

Advantages of the Panasonic Lumix DMC-ZS100:

  • Ready to shoot: Has an integrated lens, whereas the GX8 necessitates an extra lens.
  • More compact: Is smaller (111x65mm vs 133x78mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens build in (unlike the GX8).
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced at a lower price, despite coming with a build-in lens.
  • More modern: Was introduced somewhat (5 months) more recently.

If the count of individual advantages (bullet points above) is taken as a guide, the GX8 emerges as the winner of the contest (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.

GX8 08:06 ZS100

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the GX8 or the ZS100 handle or perform in practice. 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. This is where reviews by experts come in. The table below summarizes the assessments of some of the best known camera review sites. You can find the full text of the reviews, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Panasonic GX8 (⇒ rgt) Rec 82/100 Silver 4.5/5 5/5 4.5/5 2015 1,199 latest check
Panasonic ZS100 (⇒ lft) HiRec 82/100 Gold 4.5/5 4/5 4.5/5 2016 699 latest check
Canon 80D (⇒ lft | rgt) HiRec 84/100 Silver 4.5/5 4.5/5 4.5/5 2016 1,199 latest check
Canon M3 (⇒ lft | rgt) reviewed 75/100 4.5/5 4.5/5 4/5 2015 679discont. check
Leica Q Typ 116 (⇒ lft | rgt) - 80/100 Silver 4.5/5 - 4.5/5 2015 4,249 latest check
Olympus E-M1 II (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 4.5/5 2016 1,999 latest check
Olympus PEN-F (⇒ lft | rgt) - 82/100 Silver 4.5/5 4.5/5 5/5 2016 1,199 latest check
Olympus E-M5 II (⇒ lft | rgt) HiRec 81/100 Silver 5/5 4.5/5 5/5 2015 1,099 latest check
Panasonic GH5 (⇒ lft | rgt) HiRec 85/100 Gold 4.5/5 5/5 5/5 2017 1,999 latest check
Panasonic G85 (⇒ lft | rgt) HiRec 84/100 Gold 5/5 4.5/5 4.5/5 2016 899 latest check
Panasonic GX85 (⇒ lft | rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest check
Panasonic LX10 (⇒ lft | rgt) HiRec 81/100 Silver 4/5 4.5/5 4.5/5 2016 699 latest check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check
Pentax K-3 II (⇒ lft | rgt) - - 5/5 4.5/5 5/5 2015 1,099 latest check
Sony A6500 (⇒ lft | rgt) HiRec 85/100 Silver 4.5/5 5/5 4.5/5 2016 1,399 latest check
Sony RX100 IV (⇒ lft | rgt) HiRec 85/100 Gold 4/5 4.5/5 4.5/5 2015 999discont. check

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, please note that some of the review sites have changed their methodology and reporting over time.

Other comparisons

In case you would like to check on the differences and similarities of other camera models, just use the search menu below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If you cannot find the camera you are interested in, please send me an email, and I will try to locate and add the respective data to the application.

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