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Panasonic GM1 versus Panasonic LX100

The Panasonic Lumix DMC-GM1 and the Panasonic Lumix DMC-LX100 are two digital cameras that were announced, respectively, in October 2013 and September 2014. The GM1 is a mirrorless interchangeable lens camera, while the LX100 is a fixed lens compact. Both cameras are equipped with a Four Thirds sensor. The GM1 has a resolution of 15.8 megapixel, whereas the LX100 provides 12.7 MP.

Body comparison

The physical size and weight of the Panasonic GM1 and the Panasonic LX100 are illustrated 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 dimensions are rounded to the nearest millimeter. You can also use the toggle button 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 GM1 – represents 100 percent across all the size and weight measures).

Panasonic GM1 vs Panasonic LX100 front
GM1 versus LX100 top view
GM1 and LX100 rear side
Body view (GM1 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 LX100 is considerably larger (133 percent) than the Panasonic GM1. In this context, it is worth noting that neither the GM1 nor the LX100 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the LX100 has a lens build in, whereas the GM1 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 GM1 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 GM1 (⇒ rgt) 99 mm 55 mm 30 mm 204 g 230 no 2013 749discont. check
Panasonic LX100 (⇒ lft) 115 mm 66 mm 55 mm 393 g 300 no 2014 899 latest check
Canon G5 X (⇒ lft | rgt) 112 mm 76 mm 44 mm 353 g 210 no 2015 799 latest check
Canon G1 X Mark II (⇒ lft | rgt) 116 mm 74 mm 66 mm 553 g 240 no 2014 799 latest check
Fujifilm X30 (⇒ lft | rgt) 119 mm 72 mm 60 mm 423 g 470 no 2014 599 latest check
Olympus E-M10 (⇒ lft | rgt) 119 mm 82 mm 46 mm 396 g 320 no 2014 699discont. check
Panasonic GX85 (⇒ lft | rgt) 122 mm 71 mm 44 mm 426 g 290 no 2016 799 latest check
Panasonic G7 (⇒ lft | rgt) 125 mm 86 mm 77 mm 410 g 350 no 2015 649discont. check
Panasonic FZ1000 (⇒ lft | rgt) 137 mm 99 mm 131 mm 831 g 360 no 2014 899discont. check
Panasonic GH4 (⇒ lft | rgt) 133 mm 93 mm 84 mm 560 g 500 YES 2014 1,499discont. check
Panasonic GM5 (⇒ lft | rgt) 99 mm 60 mm 36 mm 211 g 220 no 2014 749discont. check
Panasonic G6 (⇒ lft | rgt) 122 mm 85 mm 71 mm 390 g 340 no 2013 599discont. check
Panasonic GX7 (⇒ lft | rgt) 123 mm 71 mm 55 mm 402 g 350 no 2013 999discont. check
Ricoh GR (⇒ lft | rgt) 117 mm 61 mm 35 mm 245 g 290 no 2013 799discont. check
Sony RX100 IV (⇒ lft | rgt) 102 mm 58 mm 41 mm 298 g 280 no 2015 999discont. 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 size of the sensor inside a digital camera is one of the key determinants 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.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Panasonic GM1 and Panasonic LX100 sensor measures
Sensor size

While the two cameras under review share the same sensor size, the GM1 offers a higher resolution of 15.8 megapixel, compared with 12.7 MP of the LX100. This megapixel advantage translates into a 12 percent gain in linear resolution. On the other hand, these sensor specs imply that the GM1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 4.21μm for the LX100). Moreover, it should be noted that the LX100 is a somewhat more recent model (by 10 months) than the GM1, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of individual pixels.

GM1 versus LX100 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GM1 (⇒ rgt) Four Thirds 15.8 4592 3448 1080/60i 22.3 11.7 660 66
Panasonic LX100 (⇒ lft) Four Thirds 12.7 4112 3088 4K/30p 22.3 12.5 553 67
Canon G5 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p - - - -
Canon G1 X Mark II (⇒ lft | rgt) 1.5-inch 13.0 4160 3120 1080/30p 21.5 10.8 581 58
Fujifilm X30 (⇒ lft | rgt) 2/3 12.0 4000 3000 1080/60p - - - -
Olympus E-M10 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/30p 22.8 12.3 884 72
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 FZ1000 (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.1 11.7 517 64
Panasonic GH4 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 4K/30p 23.2 12.8 791 74
Panasonic GM5 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.1 11.7 721 66
Panasonic G6 (⇒ lft | rgt) Four Thirds 15.9 4608 3456 1080/60p 21.3 11.5 639 61
Panasonic GX7 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 22.6 12.2 718 70
Ricoh GR (⇒ lft | rgt) APS-C 16.1 4928 3264 1080/30p 23.6 13.5 972 78
Sony RX100 IV (⇒ lft | rgt) 1-inch 20.0 5472 3648 4K/30p 22.8 12.6 591 70

Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the LX100 provides a better video resolution than the GM1. It can shoot movie footage at 4K/30p, while the GM1 is limited to 1080/60i.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the LX100 has an electronic viewfinder (2764k dots), which can be very helpful when shooting in bright sunlight. In contrast, the GM1 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Panasonic GM1, the Panasonic LX100, and comparable 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 GM1 (⇒ rgt) no no 3.0 1036 fixed YES 500 5.0 4 no
Panasonic LX100 (⇒ lft) 2764 no 3.0 921 fixed no 4000 11.0 no YES
Canon G5 X (⇒ lft | rgt) 2360 no 3.0 1040 swivel YES 2000 5.9 7 YES
Canon G1 X Mark II (⇒ lft | rgt) no no 3.0 1040 tilting YES 4000 5.2 6.8 YES
Fujifilm X30 (⇒ lft | rgt) 2360 no 3.0 920 tilting no 4000 12.0 7 ..
Olympus E-M10 (⇒ lft | rgt) 1440 no 3.0 1037 tilting YES 4000 8.0 5.8 YES
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 FZ1000 (⇒ lft | rgt) 2359 no 3.0 921 swivel no 4000 12.0 13.5 YES
Panasonic GH4 (⇒ lft | rgt) 2359 no 3.0 1036 swivel YES 8000 12.0 17 no
Panasonic GM5 (⇒ lft | rgt) 1166 no 3.0 921 fixed YES 500 5.8 no no
Panasonic G6 (⇒ lft | rgt) 1440 no 3.0 1036 swivel YES 4000 7.0 10.5 no
Panasonic GX7 (⇒ lft | rgt) 2760 no 3.0 1040 tilting YES 8000 5.0 7 YES
Ricoh GR (⇒ lft | rgt) no no 3.0 1230 fixed no 4000 4.0 5.4 no
Sony RX100 IV (⇒ lft | rgt) 2359 no 3.0 1228 tilting no 2000 16.0 10.2 YES

The LX100 is a current model that online retailers, such as amazon, will have in stock. In contrast, the GM1 has been discontinued (but it can be found pre-owned on ebay). As a replacement in the same line of cameras, the GM1 was succeeded by the Panasonic GM5.

Summary

So what conclusions can be drawn? Is there a clear favorite between the Panasonic GM1 and the Panasonic GM1? Below is a summary of the relative strengths of each of the two contestants.


Reasons to prefer the Panasonic Lumix DMC-GM1:

  • More detail: Offers more megapixels (15.8 vs 12.7MP) with a 12% higher linear resolution.
  • More detailed LCD: Has a higher resolution rear screen (1036k vs 921k dots).
  • 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 (99x55mm vs 115x66mm) and thus needs less room in the bag.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More heavily discounted: Has been on the market for longer (launched in October 2013).

Arguments in favor of the Panasonic Lumix DMC-LX100:

  • More dynamic range: Captures a broader range of light and dark details (0.8 EV of extra DR).
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Easier framing: Has an electronic viewfinder for image framing and settings control.
  • Faster shutter: Has higher mechanical shutter speed (4000/sec vs 500/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (11 vs 5 flaps/sec) to capture the decisive moment.
  • Ready to shoot: Has an integrated lens, whereas the GM1 necessitates an extra lens.
  • Longer lasting: Gets more shots (300 versus 230) out of a single battery charge.
  • More modern: Was introduced somewhat (10 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the LX100 comes out slightly ahead of the GM1 (8 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs.

GM1 07:08 LX100

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 GM1 or the LX100 handle or perform in practice. 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 following table reports the overall rankings of the cameras as published by some of the major 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 GM1 (⇒ rgt) Rec 78/100 Gold 5/5 4.5/5 4.5/5 2013 749discont. check
Panasonic LX100 (⇒ lft) HiRec 85/100 Gold 5/5 4/5 5/5 2014 899 latest check
Canon G5 X (⇒ lft | rgt) HiRec 78/100 Silver 4.5/5 4/5 4.5/5 2015 799 latest check
Canon G1 X Mark II (⇒ lft | rgt) Rec 77/100 Silver 4/5 4/5 4.5/5 2014 799 latest check
Fujifilm X30 (⇒ lft | rgt) - 76/100 4.5/5 4/5 4.5/5 2014 599 latest check
Olympus E-M10 (⇒ lft | rgt) - 80/100 Gold 5/5 4.5/5 5/5 2014 699discont. 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 FZ1000 (⇒ lft | rgt) HiRec 82/100 Gold 4.5/5 4.5/5 4.5/5 2014 899discont. check
Panasonic GH4 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 5/5 5/5 2014 1,499discont. check
Panasonic GM5 (⇒ lft | rgt) Rec 77/100 Silver 5/5 5/5 4.5/5 2014 749discont. check
Panasonic G6 (⇒ lft | rgt) HiRec - 5/5 - 4.5/5 2013 599discont. check
Panasonic GX7 (⇒ lft | rgt) Rec 79/100 Silver 5/5 4.5/5 5/5 2013 999discont. check
Ricoh GR (⇒ lft | rgt) - 79/100 Gold 4.5/5 4.5/5 4.5/5 2013 799discont. 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 comparisons of ratings among very different cameras or across long time periods 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 comparisons

In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. 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 contact me, and I will try to update the database with the necessary infos.

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