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Panasonic GM5 versus Panasonic FZ1000

The Panasonic Lumix DMC-GM5 and the Panasonic Lumix DMC-FZ1000 are two digital cameras that were revealed to the public, respectively, in September 2014 and June 2014. The GM5 is a mirrorless interchangeable lens camera, while the FZ1000 is a fixed lens compact. The cameras are based on a Four Thirds (GM5) and an one-inch sensor. The GM5 has a resolution of 15.8 megapixel, whereas the FZ1000 provides 20 MP.

Body comparison

The physical size and weight of the Panasonic GM5 and the Panasonic FZ1000 are illustrated in the side-by-side display below. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the GM5 – represents the basis or 100 percent across all the size and weight measures).

Panasonic GM5 vs Panasonic FZ1000 front
GM5 versus FZ1000 top view
GM5 and FZ1000 rear side
Body view (GM5 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 FZ1000 is considerably larger (128 percent) than the Panasonic GM5. Cameras intended for semi-professional or professional use tend to be a bit bulkier in order to give them the necessary ruggedness. In this context, it is worth noting that neither the GM5 nor the FZ1000 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the FZ1000 has a lens build in, whereas the GM5 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 GM5 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 GM5 (⇒ rgt) 3.9 in 2.4 in 1.4 in 7.4 oz 220 no 2014 749discont. check
Panasonic FZ1000 (⇒ lft) 5.4 in 3.9 in 5.2 in 29.3 oz 360 no 2014 899discont. check
Canon G1 X Mark II (⇒ lft | rgt) 4.6 in 2.9 in 2.6 in 19.5 oz 240 no 2014 799 latest check
Olympus E-M10 II (⇒ lft | rgt) 4.7 in 3.3 in 1.9 in 13.8 oz 320 no 2015 799discont. check
Olympus E-M10 (⇒ lft | rgt) 4.7 in 3.2 in 1.8 in 14.0 oz 320 no 2014 699discont. check
Panasonic FZ2500 (⇒ lft | rgt) 5.4 in 4.0 in 5.3 in 32.3 oz 350 no 2016 1,199 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 G7 (⇒ lft | rgt) 4.9 in 3.4 in 3.0 in 14.5 oz 350 no 2015 649discont. check
Panasonic GH4 (⇒ lft | rgt) 5.2 in 3.7 in 3.3 in 19.8 oz 500 YES 2014 1,499discont. check
Panasonic LX100 (⇒ lft | rgt) 4.5 in 2.6 in 2.2 in 13.9 oz 300 no 2014 899 latest check
Panasonic G6 (⇒ lft | rgt) 4.8 in 3.3 in 2.8 in 13.8 oz 340 no 2013 599discont. check
Panasonic GM1 (⇒ lft | rgt) 3.9 in 2.2 in 1.2 in 7.2 oz 230 no 2013 749discont. check
Panasonic GX7 (⇒ lft | rgt) 4.8 in 2.8 in 2.2 in 14.2 oz 350 no 2013 999discont. check
Sony RX100 IV (⇒ lft | rgt) 4.0 in 2.3 in 1.6 in 10.5 oz 280 no 2015 999discont. check
Sony RX100 III (⇒ lft | rgt) 4.0 in 2.3 in 1.6 in 10.2 oz 320 no 2014 799discont. check
Sony RX100 II (⇒ lft | rgt) 4.0 in 2.3 in 1.5 in 9.9 oz 350 no 2013 749discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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. 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Panasonic GM5 features a Four Thirds sensor and the Panasonic FZ1000 an one-inch sensor. The sensor area in the FZ1000 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 GM5 has a native 4:3 aspect ratio, while the one in the FZ1000 offers a 3:2 aspect.

Panasonic GM5 and Panasonic FZ1000 sensor measures
Sensor size

Despite having a smaller sensor, the FZ1000 offers a higher resolution of 20 megapixel, compared with 15.8 MP of the GM5. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 3.77μm for the GM5). Moreover, it should be noted that the GM5 is a somewhat more recent model (by 3 months) than the FZ1000, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

GM5 versus FZ1000 MP
Sensor resolution

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar image quality. 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 GM5 (⇒ rgt) Four Thirds 15.8 4592 3448 1080/60p 22.1 11.7 721 66
Panasonic FZ1000 (⇒ lft) 1-inch 20.0 5472 3648 4K/30p 22.1 11.7 517 64
Canon G1 X Mark II (⇒ lft | rgt) 1.5-inch 13.0 4160 3120 1080/30p 21.5 10.8 581 58
Olympus E-M10 II (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 23.1 12.5 842 73
Olympus E-M10 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.3 884 72
Panasonic FZ2500 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p .. .. .. ..
Panasonic GX85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
Panasonic G7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p - - - -
Panasonic GH4 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/30p 23.2 12.8 791 74
Panasonic LX100 (⇒ lft | rgt) Four Thirds 12.7 4112 3088 4K/30p 22.3 12.5 553 67
Panasonic G6 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 21.3 11.5 639 61
Panasonic GM1 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60i 22.3 11.7 660 66
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70
Sony RX100 IV (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.6 591 70
Sony RX100 III (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.4 12.3 495 67
Sony RX100 II (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 22.5 12.4 483 67

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 FZ1000 provides a better video resolution than the GM5. It can shoot movie footage at 4K/30p, while the GM5 is limited to 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the FZ1000 offers a substantially higher resolution than the one in the GM5 (2359k vs 1166k dots). The table below summarizes some of the other core capabilities of the Panasonic GM5 and Panasonic FZ1000 in connection with corresponding information for a sample of similar cameras. 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 GM5 (⇒ rgt) 1166 no 3.0 921 fixed YES 500 5.8 no no
Panasonic FZ1000 (⇒ lft) 2359 no 3.0 921 swivel no 4000 12.0 13.5 no
Canon G1 X Mark II (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 5.2 6.8 no
Olympus E-M10 II (⇒ lft | rgt) 2360 no 3.0 1040 tilting YES 4000 8.0 5.8 YES
Olympus E-M10 (⇒ lft | rgt) 1440 no 3.0 1037 tilting YES 4000 8.0 5.8 YES
Panasonic FZ2500 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 12.0 13.2 no
Panasonic GX85 (⇒ lft | rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
Panasonic G7 (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 4000 7.0 9.3 no
Panasonic GH4 (⇒ lft | rgt) 2359 no 3.0 1036 swivel YES 8000 12.0 17 no
Panasonic LX100 (⇒ lft | rgt) 2764 no 3.0 921 fixed no 4000 11.0 7 no
Panasonic G6 (⇒ lft | rgt) 1440 no 3.0 1036 swivel YES 4000 7.0 10.5 no
Panasonic GM1 (⇒ lft | rgt) no no 3.0 1036 fixed YES 500 5.0 4 no
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES
Sony RX100 IV (⇒ lft | rgt) 2359 no 3.0 1228 tilting no 2000 16.0 10.2 no
Sony RX100 III (⇒ lft | rgt) 1440 no 3.0 1229 tilting no 2000 10.0 YES no
Sony RX100 II (⇒ lft | rgt) no no 3.0 1229 tilting no 2000 10.0 15 no

Both the GM5 and the FZ1000 have been discontinued, but can regularly be found used on ebay. The FZ1000 was replaced by the Panasonic FZ2500, while the GM5 was followed by the ...

Summary

So how do things add up? Is the Panasonic GM5 better than the Panasonic FZ1000 or vice versa? The listing below highlights the relative strengths of the two models.


Advantages of the Panasonic Lumix DMC-GM5:

  • Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • More compact: Is smaller (99x60mm vs 137x99mm) and thus needs less room in the bag.
  • More modern: Is somewhat more recent (announced 3 months after the FZ1000).

Reasons to prefer the Panasonic Lumix DMC-FZ1000:

  • More detail: Has more megapixels (20 vs 15.8MP), which boosts linear resolution by 15%.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • More detailed viewfinder: Has a higher resolution electronic viewfinder (2359k 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 (4000/sec vs 500/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (12 vs 5.8 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has an integrated lens, whereas the GM5 necessitates an extra lens.
  • Longer lasting: Gets more shots (360 versus 220) out of a single battery charge.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More heavily discounted: Has been on the market for longer (launched in September 2014).

If the count of individual advantages (bullet points above) is taken as a guide, the FZ1000 is the clear winner of the contest (10 : 5 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.

GM5 05:10 FZ1000

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 GM5 and the FZ1000 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. This is why expert reviews are important. The table below summarizes the assessments of some of the best known camera review sites. The full reviews are available, 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 GM5 (⇒ rgt) Rec 77/100 Silver 5/5 5/5 4.5/5 2014 749discont. check
Panasonic FZ1000 (⇒ lft) HiRec 82/100 Gold 4.5/5 4.5/5 4.5/5 2014 899discont. check
Canon G1 X Mark II (⇒ lft | rgt) Rec 77/100 Silver 4/5 4/5 4.5/5 2014 799 latest check
Olympus E-M10 II (⇒ lft | rgt) HiRec 80/100 Silver 5/5 5/5 5/5 2015 799discont. check
Olympus E-M10 (⇒ lft | rgt) - 80/100 Gold 5/5 4.5/5 5/5 2014 699discont. check
Panasonic FZ2500 (⇒ lft | rgt) Rec 82/100 Silver 4.5/5 4.5/5 5/5 2016 1,199 latest check
Panasonic GX85 (⇒ lft | rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest check
Panasonic G7 (⇒ lft | rgt) HiRec 80/100 Silver 5/5 4.5/5 4.5/5 2015 649discont. check
Panasonic GH4 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 5/5 5/5 2014 1,499discont. check
Panasonic LX100 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 4/5 5/5 2014 899 latest check
Panasonic G6 (⇒ lft | rgt) HiRec - 5/5 - 4.5/5 2013 599discont. check
Panasonic GM1 (⇒ lft | rgt) Rec 78/100 Gold 5/5 4.5/5 4.5/5 2013 749discont. check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check
Sony RX100 IV (⇒ lft | rgt) HiRec 85/100 Gold 4/5 4.5/5 4.5/5 2015 999discont. check
Sony RX100 III (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 5/5 2014 799discont. check
Sony RX100 II (⇒ lft | rgt) HiRec 79/100 Silver 4.5/5 5/5 4.5/5 2013 749discont. check

The above review scores should be interpreted 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 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.

Other comparisons

In case you would like to check on the differences and similarities of other camera models, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. 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.

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