Nikon D3100 vs Panasonic G3
The Nikon D3100 and the Panasonic Lumix DMC-G3 are two digital cameras that were announced, respectively, in August 2010 and May 2011. The D3100 is a DSLR, while the G3 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (D3100) and a Four Thirds (G3) sensor. The Nikon has a resolution of 14.2 megapixels, whereas the Panasonic provides 15.8 MP. Read on to find out how these two cameras compare with respect to their body size, their sensors, their features, their input-output connections, and their reception by expert reviewers.
|Nikon D3100||Panasonic G3|
|Digital single lens reflex||Mirrorless system camera|
|Nikon F mount lenses||Micro Four Thirds lenses|
|14.2 MP, APS-C Sensor||15.8 MP, Four Thirds Sensor|
|1080/24p Video||1080/60i Video|
|ISO 100-3200 (100-12800)||ISO 160-6400|
|Optical viewfinder||Electronic viewfinder (1440k dots)|
|3.0" LCD, 230k dots||3.0" LCD, 460k dots|
|Fixed screen (not touch-sensitive)||Swivel touchscreen|
|3 shutter flaps per second||4 shutter flaps per second|
|550 shots per battery charge||270 shots per battery charge|
|124 x 96 x 75 mm, 505 g||115 x 84 x 47 mm, 336 g|
Body comparison: Nikon D3100 vs Panasonic G3
The physical size and weight of the Nikon D3100 and the Panasonic G3 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. 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 side – the D3100 – represents the basis for the calculations 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 G3 is notably smaller (19 percent) than the Nikon D3100. Moreover, the G3 is markedly lighter (33 percent) than the D3100. In this context, it is worth noting that neither the D3100 nor the G3 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D3100) and the Micro Four Thirds Lens Catalog (G3). Mirrorless cameras, such as the G3, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
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.
|Nikon D3100»||4.9 in||3.8 in||3.0 in||17.8 oz||550||n||Aug 2010||599||-||Nikon D3100|
|Panasonic G3«||4.5 in||3.3 in||1.9 in||11.9 oz||270||n||May 2011||599||-||Panasonic G3|
|Nikon D3200« »||4.9 in||3.8 in||3.0 in||17.8 oz||540||n||Apr 2012||599||-||Nikon D3200|
|Nikon D5100« »||5.0 in||3.8 in||3.1 in||19.8 oz||660||n||Apr 2011||749||-||Nikon D5100|
|Nikon D7000« »||5.2 in||4.1 in||3.0 in||27.5 oz||1050||Y||Sep 2010||1,499||-||Nikon D7000|
|Nikon D3000« »||5.0 in||3.8 in||2.5 in||18.9 oz||500||n||Jul 2009||599||-||Nikon D3000|
|Nikon D5000« »||5.0 in||4.1 in||3.1 in||20.8 oz||510||n||Apr 2009||749||-||Nikon D5000|
|Nikon D60« »||5.0 in||3.7 in||2.5 in||18.4 oz||500||n||Jan 2008||629||-||Nikon D60|
|Nikon D40X« »||4.9 in||3.7 in||2.5 in||18.4 oz||520||n||Mar 2007||729||-||Nikon D40X|
|Nikon D40« »||4.9 in||3.7 in||2.5 in||18.4 oz||470||n||Nov 2006||499||-||Nikon D40|
|Panasonic G6« »||4.8 in||3.3 in||2.8 in||13.8 oz||340||n||Apr 2013||599||-||Panasonic G6|
|Panasonic G5« »||4.7 in||3.3 in||2.8 in||14.0 oz||320||n||Jul 2012||599||-||Panasonic G5|
|Panasonic GX1« »||4.6 in||2.7 in||1.5 in||11.2 oz||320||n||Nov 2011||949||-||Panasonic GX1|
|Panasonic G2« »||4.9 in||3.3 in||2.9 in||15.1 oz||360||n||Mar 2010||599||-||Panasonic G2|
|Panasonic GH2« »||4.9 in||3.5 in||3.0 in||15.6 oz||330||n||Sep 2010||1,499||-||Panasonic GH2|
|Sony NEX-5N« »||4.4 in||2.3 in||1.5 in||9.5 oz||460||n||Aug 2011||699||-||Sony NEX-5N|
|Sony NEX-C3« »||4.3 in||2.4 in||1.3 in||7.9 oz||400||n||Jun 2011||599||-||Sony NEX-C3|
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 two cameras under review were launched at the same price and fall into the same 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.
Sensor comparison: Nikon D3100 vs Panasonic G3
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.
Of the two cameras under consideration, the Nikon D3100 features an APS-C sensor and the Panasonic G3 a Four Thirds sensor. The sensor area in the G3 is 37 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the D3100 has a native 3:2 aspect ratio, while the one in the G3 offers a 4:3 aspect.
Despite having a smaller sensor, the G3 offers a higher resolution of 15.8 megapixels, compared with 14.2 MP of the D3100. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 5.01μm for the D3100). However, it should be noted that the G3 is a somewhat more recent model (by 8 months) than the D3100, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.
The Nikon D3100 has a native sensitivity range from ISO 100 to ISO 3200, which can be extended to ISO 100-12800. The corresponding ISO settings for the Panasonic Lumix DMC-G3 are ISO 160 to ISO 6400 (no boost).
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"). Of the two cameras under review, the D3100 provides substantially higher image quality than the G3, with an overall score that is 11 points higher. This advantage is based on 1.5 bits higher color depth, 0.7 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.
|Nikon D3100»||APS-C||14.2||4608||3072||1080/24p||22.5||11.3||919||67||Nikon D3100|
|Panasonic G3«||Four Thirds||15.8||4592||3448||1080/60i||21.0||10.6||667||56||Panasonic G3|
|Nikon D3200« »||APS-C||24.1||6016||4000||1080/30p||24.1||13.2||1131||81||Nikon D3200|
|Nikon D5100« »||APS-C||16.1||4928||3264||1080/30p||23.5||13.6||1183||80||Nikon D5100|
|Nikon D7000« »||APS-C||16.1||4928||3264||10800/24p||23.5||13.9||1167||80||Nikon D7000|
|Nikon D3000« »||APS-C||10.0||3872||2592||-||22.3||11.1||563||62||Nikon D3000|
|Nikon D5000« »||APS-C||12.2||4288||2848||720/24p||22.7||12.5||868||72||Nikon D5000|
|Nikon D60« »||APS-C||10.0||3872||2592||-||22.5||11.4||562||65||Nikon D60|
|Nikon D40X« »||APS-C||10.0||3872||2592||-||22.4||11.4||516||63||Nikon D40X|
|Nikon D40« »||APS-C||6.0||3008||2000||-||21.0||11.0||561||56||Nikon D40|
|Panasonic G6« »||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61||Panasonic G6|
|Panasonic G5« »||Four Thirds||15.9||4608||3456||1080/60p||-||-||-||-||Panasonic G5|
|Panasonic GX1« »||Four Thirds||15.8||4592||3448||1080/60p||20.8||10.6||703||55||Panasonic GX1|
|Panasonic G2« »||Four Thirds||12.0||4000||3000||720/30p||21.2||10.3||493||53||Panasonic G2|
|Panasonic GH2« »||Four Thirds||15.9||4608||3456||1080/60i||21.2||11.3||655||60||Panasonic GH2|
|Sony NEX-5N« »||APS-C||16.0||4912||3264||1080/60i||23.6||12.7||1079||77||Sony NEX-5N|
|Sony NEX-C3« »||APS-C||16.0||4912||3264||720/30p||22.7||12.2||1083||73||Sony NEX-C3|
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 G3 provides a faster frame rate than the D3100. It can shoot movie footage at 1080/60i, while the Nikon is limited to 1080/24p.
Feature comparison: Nikon D3100 vs Panasonic G3
Beyond body and sensor, cameras can and do differ across a range of features. For example, the G3 has an electronic viewfinder (1440k dots), while the D3100 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Nikon D3100 and Panasonic G3 in connection with corresponding information for a sample of similar cameras.
|Nikon D3100»||optical||n||3.0||230||fixed||n||4000||3.0||Y||n||Nikon D3100|
|Panasonic G3«||1440||n||3.0||460||swivel||Y||4000||4.0||Y||n||Panasonic G3|
|Nikon D3200« »||optical||n||3.0||921||fixed||n||4000||4.0||Y||n||Nikon D3200|
|Nikon D5100« »||optical||n||3.0||921||swivel||n||4000||4.0||Y||n||Nikon D5100|
|Nikon D7000« »||optical||Y||3.0||921||fixed||n||8000||6.0||Y||n||Nikon D7000|
|Nikon D3000« »||optical||n||3.0||230||fixed||n||4000||3.0||Y||n||Nikon D3000|
|Nikon D5000« »||optical||n||2.7||230||full-flex||n||4000||4.0||Y||n||Nikon D5000|
|Nikon D60« »||optical||n||2.5||230||fixed||n||4000||3.0||Y||n||Nikon D60|
|Nikon D40X« »||optical||n||2.5||230||fixed||n||4000||3.0||Y||n||Nikon D40X|
|Nikon D40« »||optical||n||2.5||230||fixed||n||4000||2.5||Y||n||Nikon D40|
|Panasonic G6« »||1440||n||3.0||1036||swivel||Y||4000||7.0||Y||n||Panasonic G6|
|Panasonic G5« »||1440||n||3.0||920||swivel||Y||4000||6.0||Y||n||Panasonic G5|
|Panasonic GX1« »||-||n||3.0||460||fixed||Y||4000||4.2||Y||n||Panasonic GX1|
|Panasonic G2« »||1440||n||3.0||460||swivel||Y||4000||2.6||Y||n||Panasonic G2|
|Panasonic GH2« »||1534||n||3.0||460||swivel||n||4000||3.0||Y||n||Panasonic GH2|
|Sony NEX-5N« »||-||n||3.0||920||tilting||Y||4000||10.0||n||n||Sony NEX-5N|
|Sony NEX-C3« »||-||n||3.0||920||tilting||n||4000||5.5||n||n||Sony NEX-C3|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G3 has a touchscreen, while the D3100 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.The G3 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the D3100 does not have a selfie-screen.
Concerning the storage of imaging data, both the D3100 and the G3 write their files to SDXC cards.
Connectivity comparison: Nikon D3100 vs Panasonic G3
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 Nikon D3100 and Panasonic Lumix DMC-G3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Nikon D3100»||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D3100|
|Panasonic G3«||Y||stereo||mono||-||-||mini||2.0||-||-||-||Panasonic G3|
|Nikon D3200« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D3200|
|Nikon D5100« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D5100|
|Nikon D7000« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Nikon D7000|
|Nikon D3000« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D3000|
|Nikon D5000« »||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D5000|
|Nikon D60« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D60|
|Nikon D40X« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D40X|
|Nikon D40« »||Y||-||-||-||-||-||2.0||-||-||-||Nikon D40|
|Panasonic G6« »||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-||Panasonic G6|
|Panasonic G5« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Panasonic G5|
|Panasonic GX1« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Panasonic GX1|
|Panasonic G2« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Panasonic G2|
|Panasonic GH2« »||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Panasonic GH2|
|Sony NEX-5N« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Sony NEX-5N|
|Sony NEX-C3« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Sony NEX-C3|
Both the D3100 and the G3 have been discontinued, but can regularly be found used on eBay. The D3100 was replaced by the Nikon D3200, while the G3 was followed by the Panasonic G5.
Review summary: Nikon D3100 vs Panasonic G3
So what is the bottom line? Is there a clear favorite between the Nikon D3100 and the Panasonic G3? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Nikon D3100:
- Better image quality: Scores substantially higher (11 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.5 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (0.7 EV of extra DR).
- Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Longer lasting: Can take more shots (550 versus 270) on a single battery charge.
- More heavily discounted: Has been on the market for longer (launched in August 2010).
Reasons to prefer the Panasonic Lumix DMC-G3:
- Better video: Provides higher movie framerates (1080/60i versus 1080/24p).
- More framing info: Has an electronic viewfinder that displays shooting data.
- More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
- More flexible LCD: Has swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (4 vs 3 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (115x84mm vs 124x96mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 169g or 33 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More modern: Was introduced somewhat (8 months) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the G3 is the clear winner of the contest (11 : 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 before making a camera decision.
In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the D3100 or the G3 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.
Expert reviews: Nikon D3100 vs Panasonic G3
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 (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.
|Nikon D3100»||HiRec||72/100||4.5/5||5/5||4.5/5||Aug 2010||599||-||Nikon D3100|
|Panasonic G3«||HiRec||75/100||4.5/5||4.5/5||5/5||May 2011||599||-||Panasonic G3|
|Nikon D3200« »||HiRec||73/100||4.5/5||4.5/5||4.5/5||Apr 2012||599||-||Nikon D3200|
|Nikon D5100« »||HiRec||76/100||4.5/5||5/5||4.5/5||Apr 2011||749||-||Nikon D5100|
|Nikon D7000« »||-||80/100||4.5/5||5/5||4.5/5||Sep 2010||1,499||-||Nikon D7000|
|Nikon D3000« »||Rec||72/100||4/5||3.5/5||4.5/5||Jul 2009||599||-||Nikon D3000|
|Nikon D5000« »||HiRec||75/100||4/5||5/5||4.5/5||Apr 2009||749||-||Nikon D5000|
|Nikon D60« »||80/100||HiRec||4/5||rev||4.5/5||Jan 2008||629||-||Nikon D60|
|Nikon D40X« »||79/100||HiRec||4/5||rev||4/5||Mar 2007||729||-||Nikon D40X|
|Nikon D40« »||81/100||HiRec||rev||5/5||4.5/5||Nov 2006||499||-||Nikon D40|
|Panasonic G6« »||HiRec||-||5/5||-||4.5/5||Apr 2013||599||-||Panasonic G6|
|Panasonic G5« »||HiRec||-||4.5/5||4.5/5||4.5/5||Jul 2012||599||-||Panasonic G5|
|Panasonic GX1« »||Rec||77/100||4.5/5||4.5/5||4.5/5||Nov 2011||949||-||Panasonic GX1|
|Panasonic G2« »||-||72/100||4/5||4/5||4.5/5||Mar 2010||599||-||Panasonic G2|
|Panasonic GH2« »||HiRec||79/100||4.5/5||4.5/5||5/5||Sep 2010||1,499||-||Panasonic GH2|
|Sony NEX-5N« »||HiRec||79/100||4.5/5||5/5||4.5/5||Aug 2011||699||-||Sony NEX-5N|
|Sony NEX-C3« »||HiRec||74/100||4.5/5||4.5/5||4/5||Jun 2011||599||-||Sony NEX-C3|
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. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 7D II vs Nikon D5500
- Canon D30 vs Canon 77D
- Canon G5 X vs Panasonic GX8
- Canon SX740 vs Pentax K-3 II
- Canon T1i vs Canon T2i
- Fujifilm X-T20 vs Fujifilm XF10
- Leica M10-P vs Leica M Typ 240
- Leica X1 vs Canon G1 X Mark II
- Panasonic G6 vs Panasonic GX800
- Panasonic GH5s vs Sony A5000
- Sony NEX-7 vs Nikon D7100
- Sony NEX-7 vs Olympus E-M1 II
Specifications: Nikon D3100 vs Panasonic G3
|Camera Model||Nikon D3100||Panasonic G3|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Nikon F mount lenses||Micro Four Thirds lenses|
|Launch Date||August 2010||May 2011|
|Launch Price||USD 599||USD 599|
|Sensor Format||APS-C Sensor||Four Thirds Sensor|
|Sensor Size||23.1 x 15.4 mm||17.3 x 15.4 mm|
|Sensor Area||355.74 mm2||224.9 mm2|
|Sensor Diagonal||27.8 mm||21.6 mm|
|Sensor Resolution||14.2 Megapixels||15.8 Megapixels|
|Image Resolution||4608 x 3072 pixels||4592 x 3448 pixels|
|Pixel Pitch||5.01 μm||3.77 μm|
|Pixel Density||3.98 MP/cm2||7.04 MP/cm2|
|Movie Capability||1080/24p Video||1080/60i Video|
|ISO Setting||100-3200 ISO||160-6400 ISO|
|ISO Boost||100-12800 ISO||no Enhancement|
|Image Processor||EXPEED 2||Venus FHD|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Resolution||n/a||1440k dots|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||230k dots||460k dots|
|LCD Attachment||Fixed screen||Swivel screen|
|Touch Input||no Touchscreen||Touchscreen|
|Maximum Shutter Speed||1/4000s||1/4000s|
|Continuous Shooting||3 shutter flaps/s||4 shutter flaps/s|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDXC cards||SDXC cards|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Battery Type||EN-EL14 power pack||DMW-BLD10 power pack|
|Battery Life (CIPA)||550 shots per charge||270 shots per charge|
124 x 96 x 75 mm
(4.9 x 3.8 x 3.0 in)
115 x 84 x 47 mm
(4.5 x 3.3 x 1.9 in)
|Camera Weight||505 g (17.8 oz)||336 g (11.9 oz)|
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