Panasonic GH4 versus Panasonic GM5
The Panasonic Lumix DMC-GH4 and the Panasonic Lumix DMC-GM5 are two digital cameras that were announced, respectively, in February 2014 and September 2014. Both the GH4 and the GM5 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The GH4 has a resolution of 15.9 megapixel, whereas the GM5 provides 15.8 MP.
The physical size and weight of the Panasonic GH4 and the Panasonic GM5 are illustrated in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures 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 GH4 – represents the basis or 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GM5 is considerably smaller (52 percent) than the Panasonic GH4. Moreover, the GM5 is substantially lighter (62 percent) than the GH4. It is worth mentioning in this context that the GH4 is splash and dust resistant, while the GM5 does not feature any corresponding weather-sealing.
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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can find an overview of suitable optics in the Micro Four Thirds Lens Catalog. Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.
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
|Panasonic GH4 (⇒ rgt)||133 mm||93 mm||84 mm||560 g||500||YES||2014||1,499||discont.||check|
|Panasonic GM5 (⇒ lft)||99 mm||60 mm||36 mm||211 g||220||no||2014||749||discont.||check|
|Olympus E-M5 II (⇒ lft | rgt)||124 mm||85 mm||45 mm||469 g||310||YES||2015||1,099||latest||check|
|Olympus E-M1 (⇒ lft | rgt)||130 mm||94 mm||63 mm||497 g||350||YES||2013||1,399||discont.||check|
|Panasonic GH5 (⇒ lft | rgt)||139 mm||98 mm||87 mm||725 g||410||YES||2017||1,999||latest||check|
|Panasonic G85 (⇒ lft | rgt)||128 mm||89 mm||74 mm||505 g||330||YES||2016||899||latest||check|
|Panasonic G7 (⇒ lft | rgt)||125 mm||86 mm||77 mm||410 g||350||no||2015||649||discont.||check|
|Panasonic GX8 (⇒ lft | rgt)||133 mm||78 mm||63 mm||487 g||330||YES||2015||1,199||discont.||check|
|Panasonic G6 (⇒ lft | rgt)||122 mm||85 mm||71 mm||390 g||340||no||2013||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||99 mm||55 mm||30 mm||204 g||230||no||2013||749||discont.||check|
|Panasonic GH3 (⇒ lft | rgt)||133 mm||93 mm||82 mm||550 g||540||YES||2012||1,299||discont.||check|
|Ricoh GR II (⇒ lft | rgt)||117 mm||63 mm||35 mm||251 g||320||no||2015||699||discont.||check|
|Ricoh GR (⇒ lft | rgt)||117 mm||61 mm||35 mm||245 g||290||no||2013||799||discont.||check|
|Sony A7 (⇒ lft | rgt)||127 mm||94 mm||48 mm||474 g||340||YES||2013||1,699||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The GM5 was launched at a markedly lower price (by 50 percent) than the GH4, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the imaging sensor is a crucial determinant 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies 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.
While the two cameras under review share the same sensor size, the GH4 offers a slightly higher resolution of 15.9 megapixel, compared with 15.8 MP of the GM5. This megapixel advantage translates into a 0.3 percent gain in linear resolution. On the other hand, these sensor specs imply that the GH4 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 3.77μm for the GM5). Moreover, it should be noted that the GM5 is a somewhat more recent model (by 7 months) than the GH4, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of individual pixels.
Consistent information on actual sensor performance is available from DXO Mark for most cameras. 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"). Of the two cameras under review, the GH4 has a notably higher overall DXO score than the GM5 (overall score 8 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 1.1 EV in additional dynamic range, and 0.1 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.
|Panasonic GH4 (⇒ rgt)||Four Thirds||15.9||4608||3456||4K/30p||23.2||12.8||791||74|
|Panasonic GM5 (⇒ lft)||Four Thirds||15.8||4592||3448||1080/60p||22.1||11.7||721||66|
|Olympus E-M5 II (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||23.0||12.5||842||73|
|Olympus E-M1 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/30p||23.0||12.7||757||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 G7 (⇒ lft | rgt)||Four Thirds||15.8||4592||3448||4K/30p||-||-||-||-|
|Panasonic GX8 (⇒ lft | rgt)||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|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 GH3 (⇒ lft | rgt)||Four Thirds||15.9||4608||3456||1080/60p||22.7||12.4||812||71|
|Ricoh GR II (⇒ lft | rgt)||APS-C||16.1||4928||3264||1080/30p||23.6||13.7||1078||80|
|Ricoh GR (⇒ lft | rgt)||APS-C||16.1||4928||3264||1080/30p||23.6||13.5||972||78|
|Sony A7 (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the GH4 provides a higher video resolution than the GM5. It can shoot video footage at 4K/30p, while the GM5 is limited to 1080/60p.
Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the GH4 offers a substantially higher resolution than the one in the GM5 (2359k vs 1166k dots). The following table reports on some other key feature differences and similarities of the Panasonic GH4, the Panasonic GM5, and comparable cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.
|Panasonic GH4 (⇒ rgt)||2359||no||3.0||1036||swivel||YES||8000||12.0||17||no|
|Panasonic GM5 (⇒ lft)||1166||no||3.0||921||fixed||YES||500||5.8||no||no|
|Olympus E-M5 II (⇒ lft | rgt)||2360||no||3.0||1037||swivel||YES||8000||10.0||no||YES|
|Olympus E-M1 (⇒ lft | rgt)||2360||no||3.0||1037||tilting||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 G7 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||4000||7.0||9.3||no|
|Panasonic GX8 (⇒ lft | rgt)||2360||no||3.0||1040||swivel||YES||8000||10.0||no||YES|
|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 GH3 (⇒ lft | rgt)||1746||no||3.0||614||swivel||YES||4000||6.0||12||no|
|Ricoh GR II (⇒ lft | rgt)||no||no||3.0||1230||fixed||no||4000||4.0||3||no|
|Ricoh GR (⇒ lft | rgt)||no||no||3.0||1230||fixed||no||4000||4.0||5.4||no|
|Sony A7 (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||no|
Both the GH4 and the GM5 have been discontinued, but can regularly be found used on ebay. The GH4 was replaced by the Panasonic GH5, while the GM5 was followed by the ...
So what conclusions can be drawn? Is there a clear favorite between the Panasonic GH4 and the Panasonic GH4? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Panasonic Lumix DMC-GH4:
- Better image quality: Scores markedly higher (8 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (1.1 EV of extra DR).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- More detailed viewfinder: Has higher resolution electronic viewfinder (2359k vs 1166k dots).
- More detailed LCD: Has a higher resolution rear screen (1036k vs 921k dots).
- More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (8000/sec vs 500/sec) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 5.8 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (500 versus 220) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- 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 February 2014).
Arguments in favor of the Panasonic Lumix DMC-GM5:
- More compact: Is smaller (99x60mm vs 133x93mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 349g or 62 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
- More modern: Was introduced somewhat (7 months) more recently.
If the count of individual advantages (bullet points above) is taken as a guide, the GH4 is the clear winner of the match-up (13 : 4 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.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the GH4 or the GM5. 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. The full reviews are available, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Panasonic GH4 (⇒ rgt)||HiRec||85/100 Gold||5/5||5/5||5/5||2014||1,499||discont.||check|
|Panasonic GM5 (⇒ lft)||Rec||77/100 Silver||5/5||5/5||4.5/5||2014||749||discont.||check|
|Olympus E-M5 II (⇒ lft | rgt)||HiRec||81/100 Silver||5/5||4.5/5||5/5||2015||1,099||latest||check|
|Olympus E-M1 (⇒ lft | rgt)||HiRec||84/100 Gold||4.5/5||4.5/5||4.5/5||2013||1,399||discont.||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 G7 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4.5/5||4.5/5||2015||649||discont.||check|
|Panasonic GX8 (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||4.5/5||2015||1,199||discont.||check|
|Panasonic G6 (⇒ lft | rgt)||HiRec||-||5/5||-||4.5/5||2013||599||discont.||check|
|Panasonic GM1 (⇒ lft | rgt)||Rec||78/100 Gold||5/5||4.5/5||4.5/5||2013||749||discont.||check|
|Panasonic GH3 (⇒ lft | rgt)||HiRec||79/100 Gold||4.5/5||5/5||4.5/5||2012||1,299||discont.||check|
|Ricoh GR II (⇒ lft | rgt)||-||-||4.5/5||4.5/5||4.5/5||2015||699||discont.||check|
|Ricoh GR (⇒ lft | rgt)||-||79/100 Gold||4.5/5||4.5/5||4.5/5||2013||799||discont.||check|
|Sony A7 (⇒ lft | rgt)||HiRec||80/100 Silver||5/5||4.5/5||5/5||2013||1,699||discont.||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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If the camera you are interested in is not available, please contact me, and I will try to add information on that model to the database.
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