Olympus E-PM1 vs Panasonic GX1
The Olympus PEN E-PM1 and the Panasonic Lumix DMC-GX1 are two digital cameras that were announced, respectively, in June 2011 and November 2011. Both the E-PM1 and the GX1 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The Olympus has a resolution of 12.2 megapixels, whereas the Panasonic provides 15.8 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Olympus E-PM1||Panasonic GX1|
|Mirrorless system camera||Mirrorless system camera|
|Micro Four Thirds lenses||Micro Four Thirds lenses|
|12.2 MP, Four Thirds Sensor||15.8 MP, Four Thirds Sensor|
|1080/60i Video||1080/60p Video|
|ISO 100-12,800||ISO 160-12,800|
|Viewfinder optional||Viewfinder optional|
|3.0 LCD, 460k dots||3.0 LCD, 460k dots|
|Fixed screen (not touch-sensitive)||Fixed touchscreen|
|5.5 shutter flaps per second||4.2 shutter flaps per second|
|In-body stabilization||Lens stabilization only|
|330 shots per battery charge||320 shots per battery charge|
|110 x 64 x 34 mm, 265 g||116 x 68 x 39 mm, 318 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus PEN E-PM1 and the Panasonic Lumix DMC-GX1? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
The physical size and weight of the Olympus E-PM1 and the Panasonic GX1 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. 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.
The E-PM1 can be obtained in six different colors (black, silver, brown, pink, purple, white), while the GX1 is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX1 is notably larger (12 percent) than the Olympus E-PM1. Moreover, the GX1 is markedly heavier (20 percent) than the E-PM1. In this context, it is worth noting that neither the E-PM1 nor the GX1 are weather-sealed.
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 compare the optics available 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. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Olympus E-PM1||4.3 in||2.5 in||1.3 in||9.3 oz||330||n||Jun 2011||499|
|Panasonic GX1||4.6 in||2.7 in||1.5 in||11.2 oz||320||n||Nov 2011||699|
|Olympus E-PL5||4.4 in||2.5 in||1.5 in||11.5 oz||360||n||Sep 2012||599|
|Olympus E-PM2||4.3 in||2.5 in||1.3 in||9.5 oz||360||n||Sep 2012||499|
|Olympus E-P3||4.8 in||2.7 in||1.3 in||13.0 oz||330||n||Jun 2011||799|
|Olympus E-PL2||4.5 in||2.8 in||1.7 in||12.8 oz||280||n||Jan 2011||599|
|Olympus E-PL3||4.3 in||2.5 in||1.5 in||11.0 oz||300||n||Jun 2011||599|
|Olympus E-PL1||4.5 in||2.8 in||1.7 in||11.8 oz||290||n||Feb 2010||599|
|Panasonic G6||4.8 in||3.3 in||2.8 in||13.8 oz||340||n||Apr 2013||599|
|Panasonic GM1||3.9 in||2.2 in||1.2 in||7.2 oz||230||n||Oct 2013||749|
|Panasonic G5||4.7 in||3.3 in||2.8 in||14.0 oz||320||n||Jul 2012||599|
|Panasonic GF5||4.3 in||2.6 in||1.5 in||9.4 oz||360||n||Apr 2012||499|
|Panasonic G3||4.5 in||3.3 in||1.9 in||11.9 oz||270||n||May 2011||599|
|Panasonic GF3||4.3 in||2.6 in||1.3 in||9.3 oz||300||n||Jun 2011||549|
|Panasonic G2||4.9 in||3.3 in||2.9 in||15.1 oz||360||n||Mar 2010||599|
|Panasonic GF2||4.4 in||2.7 in||1.3 in||10.9 oz||300||n||Nov 2010||549|
|Panasonic GH2||4.9 in||3.5 in||3.0 in||15.6 oz||330||n||Sep 2010||899|
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.
Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The E-PM1 was launched at a markedly lower price (by 29 percent) than the GX1, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.
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. 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 are more costly to manufacture and tend to 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.
Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors.
While the two cameras under review share the same sensor size, the GX1 offers a higher resolution of 15.8 megapixels, compared with 12.2 MP of the E-PM1. This megapixels advantage translates into a 14 percent gain in linear resolution. On the other hand, these sensor specs imply that the GX1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 4.29μm for the E-PM1). However, it should be noted that the GX1 is a somewhat more recent model (by 4 months) than the E-PM1, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.
The resolution advantage of the Panasonic GX1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GX1 for good quality output (200 dots per inch) amounts to 23 x 17.2 inches or 58.3 x 43.8 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.7 x 35 cm, and for excellent quality (300 dpi) 15.3 x 11.5 inches or 38.9 x 29.2 cm. The corresponding values for the Olympus E-PM1 are 20.2 x 15.1 inches or 51.2 x 38.4 cm for good quality, 16.1 x 12.1 inches or 41 x 30.7 cm for very good quality, and 13.4 x 10.1 inches or 34.1 x 25.6 cm for excellent quality prints.
The Olympus PEN E-PM1 has a native sensitivity range from ISO 100 to ISO 12800. The corresponding ISO settings for the Panasonic Lumix DMC-GX1 are ISO 160 to ISO 12800 (no boost).
Consistent information on actual sensor performance is available from DXO Mark for many 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"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Olympus E-PM1||Four Thirds||12.2||4032||3024||1080/60i||21.0||10.3||499||52|
|Panasonic GX1||Four Thirds||15.8||4592||3448||1080/60p||20.8||10.6||703||55|
|Olympus E-PL5||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||889||72|
|Olympus E-PM2||Four Thirds||15.9||4608||3456||1080/30p||22.7||12.2||932||72|
|Olympus E-P3||Four Thirds||12.2||4032||3024||1080/60i||20.8||10.1||536||51|
|Olympus E-PL2||Four Thirds||12.2||4032||3024||720/30p||21.4||10.2||573||55|
|Olympus E-PL3||Four Thirds||12.2||4032||3024||1080/60i||20.9||10.3||499||52|
|Olympus E-PL1||Four Thirds||12.2||4032||3024||720/30p||21.5||10.1||487||54|
|Panasonic G6||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|Panasonic GM1||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
|Panasonic G5||Four Thirds||15.9||4608||3456||1080/60p||..||..||..||..|
|Panasonic GF5||Four Thirds||12.0||4000||3000||1080/60i||21.4||11.6||618||61|
|Panasonic G3||Four Thirds||15.8||4592||3448||1080/60i||21.0||10.6||667||56|
|Panasonic GF3||Four Thirds||12.0||4000||3000||1080/60i||20.6||10.0||458||49|
|Panasonic G2||Four Thirds||12.0||4000||3000||720/30p||21.2||10.3||493||53|
|Panasonic GF2||Four Thirds||12.0||4000||3000||1080/60i||21.2||10.3||506||54|
|Panasonic GH2||Four Thirds||15.9||4608||3456||1080/60i||21.2||11.3||655||60|
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the GX1 provides a faster frame rate than the E-PM1. It can shoot movie footage at 1080/60p, while the Olympus is limited to 1080/60i.
Beyond body and sensor, cameras can and do differ across a range of features. The E-PM1 and the GX1 are similar in the sense that neither of the two has a viewfinder. The images are, thus, framed using live view on the rear LCD. However, optional viewfinders – the VF-2 for the E-PM1 and the DMW-LVF2 for the GX1 – are available as accessories. The table below summarizes some of the other core capabilities of the Olympus E-PM1 and Panasonic GX1 in connection with corresponding information for a sample of similar cameras.
One feature that differentiates the E-PM1 and the GX1 is in-body image stabilization (IBIS). The E-PM1 reduces the risk of handshake-induced blur with all attached lenses, while the GX1 offers no blur reduction with lenses that themselves do not provide optical image stabilization.
Concerning the storage of imaging data, both the E-PM1 and the GX1 write their files to SDXC cards. The GX1 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the E-PM1 cannot take advantage of Ultra High Speed SD cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Olympus PEN E-PM1 and Panasonic Lumix DMC-GX1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
Both the E-PM1 and the GX1 have been discontinued, but can regularly be found used on eBay. The E-PM1 was replaced by the Olympus E-PM2, while the GX1 was followed by the Panasonic GX7. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Panasonic websites.
So what is the bottom line? Is there a clear favorite between the Olympus E-PM1 and the Panasonic GX1? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Olympus PEN E-PM1:
- Faster burst: Shoots at higher frequency (5.5 vs 4.2 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (110x64mm vs 116x68mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 53g or 17 percent) and hence easier to carry around.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- More affordable: Was introduced into a lower priced category (29 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in June 2011).
Reasons to prefer the Panasonic Lumix DMC-GX1:
- More detail: Has more megapixels (15.8 vs 12.2MP), which boosts linear resolution by 14%.
- Better low-light sensitivity: Can shoot in dim conditions (0.5 stops ISO advantage).
- Better video: Provides higher movie framerates (1080/60p versus 1080/60i).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Was introduced somewhat (4 months) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the GX1 comes out slightly ahead of the E-PM1 (7 : 6 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 before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Olympus E-PM1 and the Panasonic GX1 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.
In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the E-PM1 or the GX1 perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|Olympus E-PM1||86/100||71/100||4.5/5||..||4.5/5||Jun 2011||499|
|Panasonic GX1||+||77/100||4.5/5||4.5/5||4.5/5||Nov 2011||699|
|Olympus E-PL5||+ +||..||4.5/5||4.5/5||4.5/5||Sep 2012||599|
|Olympus E-PM2||..||77/100||5/5||4.5/5||4.5/5||Sep 2012||499|
|Olympus E-P3||83/100||74/100||4.5/5||4.5/5||4.5/5||Jun 2011||799|
|Olympus E-PL2||83/100||71/100||4.5/5||4.5/5||4.5/5||Jan 2011||599|
|Olympus E-PL3||+ +||72/100||4.5/5||..||4/5||Jun 2011||599|
|Olympus E-PL1||86/100||69/100||4/5||4.5/5||4.5/5||Feb 2010||599|
|Panasonic G6||+ +||..||5/5||..||4.5/5||Apr 2013||599|
|Panasonic GM1||+||78/100||5/5||4.5/5||4.5/5||Oct 2013||749|
|Panasonic G5||+ +||..||4.5/5||4.5/5||4.5/5||Jul 2012||599|
|Panasonic GF5||..||..||4.5/5||4/5||4.5/5||Apr 2012||499|
|Panasonic G3||+ +||75/100||4.5/5||4.5/5||5/5||May 2011||599|
|Panasonic GF3||82/100||71/100||4.5/5||4.5/5||4/5||Jun 2011||549|
|Panasonic G2||..||72/100||4/5||4/5||4.5/5||Mar 2010||599|
|Panasonic GF2||82/100||70/100||4.5/5||4.5/5||4.5/5||Nov 2010||549|
|Panasonic GH2||+ +||79/100||4.5/5||4.5/5||5/5||Sep 2010||899|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. A score, therefore, has to be seen in close connection to the price and market introduction time 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.
Other camera comparisons
Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 50D vs Panasonic GX1
- Canon G1 X Mark III vs Olympus E-PM1
- Canon G5 X Mark II vs Olympus E-PM1
- Canon M50 vs Panasonic GX1
- Canon Rebel vs Olympus E-PM1
- Canon T6 vs Olympus E-PM1
- Canon XS vs Panasonic GX1
- Leica V-LUX Typ 114 vs Panasonic GX1
- Olympus E-PL1 vs Panasonic GX1
- Olympus E-PM1 vs Pentax K-1 II
- Panasonic G90 vs Panasonic GX1
- Panasonic GX1 vs Sony NEX-5
Specifications: Olympus E-PM1 vs Panasonic GX1
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Olympus E-PM1||Panasonic GX1|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Micro Four Thirds lenses||Micro Four Thirds lenses|
|Launch Date||June 2011||November 2011|
|Launch Price||USD 499||USD 699|
|Sensor Specs||Olympus E-PM1||Panasonic GX1|
|Sensor Format||Four Thirds Sensor||Four Thirds Sensor|
|Sensor Size||17.3 x 13.0 mm||17.3 x 13.0 mm|
|Sensor Area||224.9 mm2||224.9 mm2|
|Sensor Diagonal||21.6 mm||21.6 mm|
|Sensor Resolution||12.2 Megapixels||15.8 Megapixels|
|Image Resolution||4032 x 3024 pixels||4592 x 3448 pixels|
|Pixel Pitch||4.29 μm||3.77 μm|
|Pixel Density||5.42 MP/cm2||7.04 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60i Video||1080/60p Video|
|ISO Setting||100 - 12,800 ISO||160 - 12,800 ISO|
|Image Processor||TruePic VI||Venus FHD|
|DXO Sensor Quality (score)||52||55|
|DXO Color Depth (bits)||21.0||20.8|
|DXO Dynamic Range (EV)||10.3||10.6|
|DXO Low Light (ISO)||499||703|
|Screen Specs||Olympus E-PM1||Panasonic GX1|
|Viewfinder Type||Viewfinder optional||Viewfinder optional|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||460k dots||460k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Olympus E-PM1||Panasonic GX1|
|Focus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||5.5 shutter flaps/s||4.2 shutter flaps/s|
|Image Stabilization||In-body stabilization||Lens stabilization only|
|Fill Flash||no On-Board Flash||Build-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||UHS-I|
|Connectivity Specs||Olympus E-PM1||Panasonic GX1|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Olympus E-PM1||Panasonic GX1|
|Battery Life (CIPA)||330 shots per charge||320 shots per charge|
110 x 64 x 34 mm
(4.3 x 2.5 x 1.3 in)
116 x 68 x 39 mm
(4.6 x 2.7 x 1.5 in)
|Camera Weight||265 g (9.3 oz)||318 g (11.2 oz)|
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