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Olympus E-3 vs Panasonic GX7

The Olympus E-3 and the Panasonic Lumix DMC-GX7 are two digital cameras that were revealed to the public, respectively, in October 2007 and August 2013. The E-3 is a DSLR, while the GX7 is a mirrorless interchangeable lens camera. Both cameras are equipped with a Four Thirds sensor. The Olympus has a resolution of 10 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.

Headline Specifications
Olympus E-3
versus
Panasonic GX7
Olympus E-3   Panasonic GX7
Digital single lens reflex Mirrorless system camera
Four Thirds lenses Micro Four Thirds lenses
10 MP – Four Thirds sensor 15.8 MP – Four Thirds sensor
no Video 1080/60p Video
ISO 100-3,200 ISO 125-25,600
Optical viewfinder Electronic viewfinder (2760k dots)
2.5" LCD – 230k dots 3.0" LCD – 1040k dots
Swivel screen (not touch-sensitive) Tilting touchscreen
5 shutter flaps per second 5 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodynot weather sealed
750 shots per battery charge350 shots per battery charge
142 x 116 x 75 mm, 876 g 123 x 71 x 55 mm, 402 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-3 and the Panasonic Lumix DMC-GX7? 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.

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Body comparison

An illustration of the physical size and weight of the Olympus E-3 and the Panasonic GX7 is provided 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 dimensions are rounded to the nearest millimeter.

The GX7 can be obtained in two different colors (black, silver), while the E-3 is only available in black.

Size Olympus E-3 vs Panasonic GX7
Compare E-3 versus GX7 top
Comparison E-3 or GX7 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GX7 is considerably smaller (47 percent) than the Olympus E-3. Moreover, the GX7 is substantially lighter (54 percent) than the E-3. It is worth mentioning in this context that the E-3 is splash and dust resistant, while the GX7 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Four Thirds Lens Catalog (E-3) and the Micro Four Thirds Lens Catalog (GX7). Mirrorless cameras, such as the GX7, 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.

Concerning battery life, the E-3 gets 750 shots out of its Olympus BLM-1 battery, while the GX7 can take 350 images on a single charge of its Panasonic DMW-BLG10 power pack.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-3 142 mm 116 mm 75 mm 876 g 750 Y Oct 2007 1,699ebay.com
2.
 
Panasonic GX7 123 mm 71 mm 55 mm 402 g 350 n Aug 2013 999ebay.com
3.
 
Nikon D300 147 mm 114 mm 74 mm 925 g 1000 Y Aug 2007 1,799ebay.com
4.
 
Olympus E-PL7 115 mm 67 mm 38 mm 357 g 350 n Aug 2014 599ebay.com
5.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999ebay.com
6.
 
Olympus E-5 142 mm 117 mm 75 mm 873 g 750 Y Sep 2010 1,699ebay.com
7.
 
Olympus E-600 130 mm 94 mm 60 mm 535 g 500 n Aug 2009 449ebay.com
8.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
9.
 
Olympus E-30 142 mm 108 mm 75 mm 701 g 750 n Nov 2008 1,299ebay.com
10.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 n Mar 2008 599ebay.com
11.
 
Olympus E-520 136 mm 92 mm 68 mm 535 g 750 n May 2008 699ebay.com
12.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
13.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
14.
 
Olympus E-1 141 mm 104 mm 81 mm 738 g 750 Y Jun 2003 1,699ebay.com
15.
 
Panasonic GX85 122 mm 71 mm 44 mm 426 g 290 n Apr 2016 799 amazon.com
16.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
17.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. 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 GX7 was launched at a markedly lower price (by 41 percent) than the E-3, 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.

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. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 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.

Olympus E-3 and Panasonic GX7 sensor measures

While the two cameras under review share the same sensor size, the GX7 offers a higher resolution of 15.8 megapixels, compared with 10 MP of the E-3. This megapixels advantage translates into a 26 percent gain in linear resolution. On the other hand, these sensor specs imply that the GX7 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.77μm versus 4.74μm for the E-3). However, it should be noted that the GX7 is much more recent (by 5 years and 9 months) than the E-3, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size.

The resolution advantage of the Panasonic GX7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the GX7 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-3 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.

The Olympus E-3 has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Panasonic Lumix DMC-GX7 are ISO 125 to ISO 25600 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

E-3 versus GX7 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the GX7 offers substantially better image quality than the E-3 (overall score 14 points higher). The advantage is based on 1 bits higher color depth, 1.7 EV in additional dynamic range, and 0.3 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.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-3 Four Thirds 10.0 3648 2736none21.610.557156
2.
 
Panasonic GX7 Four Thirds 15.8 4592 34481080/60p22.612.271870
3.
 
Nikon D300 APS-C 12.2 4288 2848none22.112.067967
4.
 
Olympus E-PL7 Four Thirds 15.9 4608 34561080/30p22.712.487372
5.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
6.
 
Olympus E-5 Four Thirds 12.2 4032 3024720/30p21.610.551956
7.
 
Olympus E-600 Four Thirds 12.2 4032 3024none21.510.354155
8.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
9.
 
Olympus E-30 Four Thirds 12.2 4032 3024none21.310.453055
10.
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
11.
 
Olympus E-520 Four Thirds 10.0 3648 2736none21.410.454855
12.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
13.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
14.
 
Olympus E-1 Four Thirds 4.9 2560 1920none20.09.7-14544
15.
 
Panasonic GX85 Four Thirds 15.8 4592 34484K/30p22.912.666271
16.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
17.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras are not only capable of taking still images, but can also record movies. The GX7 indeed provides for movie recording, while the E-3 does not. The highest resolution format that the GX7 can use is 1080/60p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the GX7 has an electronic viewfinder (2760k dots), while the E-3 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the GX7 has a higher magnification than the one of the E-3 (0.70x vs 0.58x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Olympus E-3 and Panasonic GX7 along with similar information for a selection of comparators.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Olympus E-3optical Y2.5 / 230 swivel n 1/8000s 5.0/s Y Y
2.
 
Panasonic GX72760 n3.0 / 1040 tilting Y 1/8000s 5.0/s Y Y
3.
 
Nikon D300optical Y3.0 / 922 fixed n 1/8000s 6.0/s Y n
4.
 
Olympus E-PL7optional n3.0 / 1037 tilting Y 1/4000s 8.0/s n Y
5.
 
Olympus E-P5optional n3.0 / 1037 tilting Y 1/8000s 9.0/s Y Y
6.
 
Olympus E-5optical Y3.0 / 920 swivel n 1/8000s 5.0/s Y Y
7.
 
Olympus E-600optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
8.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
9.
 
Olympus E-30optical Y2.7 / 230 swivel n 1/8000s 5.0/s Y Y
10.
 
Olympus E-420optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
11.
 
Olympus E-520optical n2.7 / 215 fixed n 1/4000s 3.5/s Y Y
12.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
13.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
14.
 
Olympus E-1optical Y1.8 / 134 fixed n 1/4000s 3.0/s n n
15.
 
Panasonic GX852765 n3.0 / 1040 tilting Y 1/4000s 8.0/s Y Y
16.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
17.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One feature that is present on the E-3, but is missing on the GX7 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

The E-3 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the GX7 does not have a selfie-screen.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the GX7 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Panasonic GX7 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The E-3 writes its imaging data to Compact Flash or xD Picture cards, while the GX7 uses SDXC cards. The E-3 features dual card slots, which can be very useful in case a memory card fails. In contrast, the GX7 only has one slot.

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Connectivity comparison

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 E-3 and Panasonic Lumix DMC-GX7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-3Y- / ----2.0---
2.
 
Panasonic GX7Ystereo / mono--mini2.0YY-
3.
 
Nikon D300Y- / ---mini2.0---
4.
 
Olympus E-PL7Ystereo / mono--micro2.0Y--
5.
 
Olympus E-P5Ystereo / mono--micro2.0Y--
6.
 
Olympus E-5Ystereo / ---mini2.0---
7.
 
Olympus E-600Y- / ----2.0---
8.
 
Olympus E-620Y- / ----2.0---
9.
 
Olympus E-30Y- / ----2.0---
10.
 
Olympus E-420Y- / ----2.0---
11.
 
Olympus E-520Y- / ----2.0---
12.
 
Olympus E-410Y- / ----2.0---
13.
 
Olympus E-510Y- / ----2.0---
14.
 
Olympus E-1Y- / ----2.0---
15.
 
Panasonic GX85Ystereo / mono--micro2.0Y--
16.
 
Panasonic G5Ystereo / mono--mini2.0---
17.
 
Panasonic GH2Ystereo / monoY-mini2.0---
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It is notable that the GX7 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the E-3 does not provide wifi capability.

Studio photographers will appreciate that the Olympus E-3 (unlike the GX7) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the E-3 and the GX7 have been discontinued, but can regularly be found used on ebay. The E-3 was replaced by the Olympus E-5, while the GX7 was followed by the Panasonic GX85. Further information on the features and operation of the E-3 and GX7 can be found, respectively, in the Olympus E-3 Manual (free pdf) or the online Panasonic GX7 Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the Olympus E-3 or the Panasonic GX7 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Olympus E-3:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Features an LCD display on top to control shooting parameters.
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Longer lasting: Can take more shots (750 versus 350) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been available for much longer (launched in October 2007).

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Arguments in favor of the Panasonic Lumix DMC-GX7:

  • More detail: Has more megapixels (15.8 vs 10MP), which boosts linear resolution by 26%.
  • Better image quality: Scores substantially higher (14 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.3 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/60p video.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.58x).
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (123x71mm vs 142x116mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 474g or 54 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More affordable: Was introduced into a lower priced category (41 percent cheaper at launch).
  • More modern: Reflects 5 years and 9 months of technical progress since the E-3 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the GX7 is the clear winner of the contest (19 : 9 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.

E-3 09:19 GX7

How about other alternatives? Do the specifications of the Olympus E-3 and the Panasonic GX7 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the E-3 or the GX7 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.

Expert reviews

This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-3..88/100..+ +o4/5 Oct 2007 1,699ebay.com
2.
 
Panasonic GX74/5+..79/1005/55/5 Aug 2013 999ebay.com
3.
 
Nikon D300..+ +..+ +5/54.5/5 Aug 2007 1,799ebay.com
4.
 
Olympus E-PL74/5+....5/54/5 Aug 2014 599ebay.com
5.
 
Olympus E-P55/5+ +..78/1004.5/55/5 May 2013 999ebay.com
6.
 
Olympus E-54/5....75/1004/54.5/5 Sep 2010 1,699ebay.com
7.
 
Olympus E-600..........4.5/5 Aug 2009 449ebay.com
8.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
9.
 
Olympus E-30......71/1004.5/54/5 Nov 2008 1,299ebay.com
10.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 599ebay.com
11.
 
Olympus E-520..87/100..+ +4.5/54.5/5 May 2008 699ebay.com
12.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
13.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
14.
 
Olympus E-1......+o.. Jun 2003 1,699ebay.com
15.
 
Panasonic GX854.5/5+ +..82/1005/55/5 Apr 2016 799 amazon.com
16.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
17.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, 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.

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    Specifications: Olympus E-3 vs Panasonic GX7

    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 Specifications
    Camera Model Olympus E-3 Panasonic GX7
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Four Thirds lenses Micro Four Thirds lenses
    Launch Date October 2007 August 2013
    Launch Price USD 1,699 USD 999
    Sensor Specs Olympus E-3 Panasonic GX7
    Sensor Technology CMOS CMOS
    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
    Crop Factor 2.0x 2.0x
    Sensor Resolution 10 Megapixels 15.8 Megapixels
    Image Resolution 3648 x 2736 pixels 4592 x 3448 pixels
    Pixel Pitch 4.74 μm 3.77 μm
    Pixel Density 4.44 MP/cm2 7.04 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60p Video
    ISO Setting 100 - 3,200 ISO 125 - 25,600 ISO
    Image Processor TruePic III Venus
    DXO Sensor Quality (score) 56 70
    DXO Color Depth (bits) 21.6 22.6
    DXO Dynamic Range (EV) 10.5 12.2
    DXO Low Light (ISO) 571 718
    Screen Specs Olympus E-3 Panasonic GX7
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.58x 0.70x
    Viewfinder Resolution 2760k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 1040k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Olympus E-3 Panasonic GX7
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 5 shutter flaps/s 5 shutter flaps/s
    Electronic Shutterno E-Shutterup to 1/8000s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash Built-in Flash Built-in Flash
    Storage Medium CF or XD cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    Connectivity Specs Olympus E-3 Panasonic GX7
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Olympus E-3 Panasonic GX7
    Environmental SealingWeathersealed bodynot weather sealed
    Battery Type Olympus BLM-1 Panasonic DMW-BLG10
    Battery Life (CIPA)750 shots per charge350 shots per charge
    Body Dimensions 142 x 116 x 75 mm
    (5.6 x 4.6 x 3.0 in)
    123 x 71 x 55 mm
    (4.8 x 2.8 x 2.2 in)
    Camera Weight 876 g (30.9 oz) 402 g (14.2 oz)
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