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Panasonic GH2 versus Olympus E-620

The Panasonic Lumix DMC-GH2 and the Olympus E-620 are two digital cameras that were revealed to the public, respectively, in September 2010 and February 2009. The GH2 is a mirrorless interchangeable lens camera, while the E-620 is a DSLR. Both cameras are equipped with a Four Thirds sensor. The Panasonic has a resolution of 15.9 megapixel, whereas the Olympus provides 12.2 MP.

Body comparison

The physical size and weight of the Panasonic GH2 and the Olympus E-620 are illustrated in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All size dimensions are rounded to the nearest millimeter. You can also toggle the display 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 GH2 – represents the basis or 100 percent across all the size and weight measures).

Panasonic GH2 vs Olympus E-620 front
GH2 versus E-620 top view
GH2 and E-620 rear side
Body view (GH2 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-620 is notably larger (9 percent) than the Panasonic GH2. Moreover, the E-620 is markedly heavier (18 percent) than the GH2. In this context, it is worth noting that neither the GH2 nor the E-620 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. 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 find an overview of optics for the two cameras in the Micro Four Thirds Lens Catalog (GH2) and the Four Thirds Lens Catalog (E-620). Mirrorless cameras, such as the Panasonic GH2, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.

Concerning battery life, the GH2 gets 330 shots out of its DMW-BLC12 battery, while the E-620 can take 500 images on a single charge of its BLS-1 power pack.

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 GH2 (⇒ rgt) 124 mm 90 mm 76 mm 442 g 330 no 2010 1,499discont. check
Olympus E-620 (⇒ lft) 130 mm 94 mm 60 mm 521 g 500 no 2009 699discont. check
Olympus E-600 (⇒ lft | rgt) 130 mm 94 mm 60 mm 535 g 500 no 2009 449discont. check
Olympus E-420 (⇒ lft | rgt) 130 mm 91 mm 53 mm 440 g 500 no 2008 599discont. check
Olympus E-520 (⇒ lft | rgt) 136 mm 92 mm 68 mm 535 g 750 no 2008 699discont. check
Olympus E-30 (⇒ lft | rgt) 142 mm 108 mm 75 mm 701 g 750 no 2008 1,299discont. check
Olympus E-510 (⇒ lft | rgt) 136 mm 92 mm 68 mm 538 g 750 no 2007 799discont. check
Panasonic GX85 (⇒ lft | rgt) 122 mm 71 mm 44 mm 426 g 290 no 2016 799 latest 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 GM1 (⇒ lft | rgt) 99 mm 55 mm 30 mm 204 g 230 no 2013 749discont. check
Panasonic GH3 (⇒ lft | rgt) 133 mm 93 mm 82 mm 550 g 540 YES 2012 1,299discont. check
Panasonic G3 (⇒ lft | rgt) 115 mm 84 mm 47 mm 336 g 270 no 2011 599discont. check
Panasonic GX1 (⇒ lft | rgt) 116 mm 68 mm 39 mm 318 g 320 no 2011 949discont. check
Panasonic G2 (⇒ lft | rgt) 124 mm 84 mm 74 mm 428 g 360 no 2010 599discont. check
Panasonic GF1 (⇒ lft | rgt) 119 mm 71 mm 36 mm 385 g 380 no 2009 749discont. check
Panasonic GH1 (⇒ lft | rgt) 124 mm 90 mm 45 mm 385 g 300 no 2009 1,499discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-620 was launched at a markedly lower price (by 53 percent) than the GH2, 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.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color depth than smaller pixel-units in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to 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.

Panasonic GH2 and Olympus E-620 sensor measures
Sensor size

While the two cameras under review share the same sensor size, the GH2 offers a higher resolution of 15.9 megapixel, compared with 12.2 MP of the E-620. This megapixel advantage translates into a 14 percent gain in linear resolution. On the other hand, these sensor specs imply that the GH2 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.76μm versus 4.29μm for the E-620). In this context, it should be noted, however, that the GH2 is a somewhat more recent model (by 1 year and 6 months) than the E-620, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.

GH2 versus E-620 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"). Of the two cameras under review, the GH2 has a notably higher overall DXO score than the E-620 (overall score 5 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.1 bits lower color depth, 1 EV in additional dynamic range, and 0.3 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Panasonic GH2 (⇒ rgt) Four Thirds 15.9 4608 3456 1080/60i 21.2 11.3 655 60
Olympus E-620 (⇒ lft) Four Thirds 12.2 4032 3024 no 21.3 10.3 536 55
Olympus E-600 (⇒ lft | rgt) Four Thirds 12.2 4032 3024 no 21.5 10.3 541 55
Olympus E-420 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.5 10.4 527 56
Olympus E-520 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.4 10.4 548 55
Olympus E-30 (⇒ lft | rgt) Four Thirds 12.2 4032 3024 no 21.3 10.4 530 55
Olympus E-510 (⇒ lft | rgt) Four Thirds 10.0 3648 2736 no 21.2 10.0 442 52
Panasonic GX85 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 4K/30p 22.9 12.6 662 71
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 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
Panasonic G3 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60i 21 10.6 667 56
Panasonic GX1 (⇒ lft | rgt) Four Thirds 15.8 4592 3448 1080/60p 20.8 10.6 703 55
Panasonic G2 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 720/30p 21.2 10.3 493 53
Panasonic GF1 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 720/30p 21.2 10.3 513 54
Panasonic GH1 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/24p 21.6 11.6 772 64

Many modern cameras are not only capable of taking still images, but can also record movies. The GH2 indeed provides movie recording capabilities, while the E-620 does not. The highest resolution format that the GH2 can use is 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the GH2 has an electronic viewfinder (1534k dots), while the E-620 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 adjacent table lists some of the other core features of the Panasonic GH2 and Olympus E-620 along with similar information for a selection of comparators. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

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 GH2 (⇒ rgt) 1534 no 3.0 460 swivel no 4000 3.0 15.6 no
Olympus E-620 (⇒ lft) optical no 2.7 230 swivel no 4000 4.0 12 YES
Olympus E-600 (⇒ lft | rgt) optical no 2.7 230 swivel no 4000 4.0 12 YES
Olympus E-420 (⇒ lft | rgt) optical no 2.7 215 fixed no 4000 3.5 12 no
Olympus E-520 (⇒ lft | rgt) optical no 2.7 215 fixed no 4000 3.5 12 YES
Olympus E-30 (⇒ lft | rgt) optical YES 2.7 230 swivel no 8000 5.0 13 YES
Olympus E-510 (⇒ lft | rgt) optical no 2.5 215 fixed no 4000 3.0 12 YES
Panasonic GX85 (⇒ lft | rgt) 2765 no 3.0 1040 tilting YES 4000 8.0 6 YES
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 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
Panasonic G3 (⇒ lft | rgt) 1440 no 3.0 460 swivel YES 4000 4.0 11 no
Panasonic GX1 (⇒ lft | rgt) no no 3.0 460 fixed YES 4000 4.2 7.6 no
Panasonic G2 (⇒ lft | rgt) 1440 no 3.0 460 swivel YES 4000 2.6 11 no
Panasonic GF1 (⇒ lft | rgt) no no 3.0 460 fixed no 4000 3.0 6.0 no
Panasonic GH1 (⇒ lft | rgt) 1440 no 3.0 460 swivel no 4000 3.0 10.5 no

Both the GH2 and the E-620 have been discontinued, but can regularly be found used on ebay. The E-620 was replaced by the Olympus E-600, while the GH2 was followed by the Panasonic GH3.

Summary

So how do things add up? Is there a clear favorite between the Panasonic GH2 and the Panasonic GH2? A synthesis of the relative strong points of each of the models is listed below.


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Arguments in favor of the Panasonic Lumix DMC-GH2:

  • More detail: Offers more megapixels (15.9 vs 12.2MP) with a 14% higher linear resolution.
  • Better image quality: Scores markedly higher (5 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
  • Broader imaging potential: Can record not only still images but also 1080/60i movies.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
  • Less heavy: Is lighter (by 79g or 15 percent) and hence easier to carry around.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • More modern: Is somewhat more recent (announced 1 year and 6 months after the E-620).

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Advantages of the Olympus E-620:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Faster burst: Shoots at higher frequency (4 vs 3 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (500 versus 330) out of a single battery charge.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More affordable: Was introduced into a lower priced category (53 percent cheaper at launch).
  • More heavily discounted: Has been on the market for longer (launched in February 2009).

If the count of individual advantages (bullet points above) is taken as a guide, the GH2 is the clear winner of the match-up (10 : 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.

GH2 10:06 E-620

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 GH2 or the E-620 handle or perform in practice. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate. 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 detailed reviews can be accessed, respectively, on the websites of 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 GH2 (⇒ rgt) 86/100 HiRec 79/100 Silver 4.5/5 4.5/5 5/5 2010 1,499discont. check
Olympus E-620 (⇒ lft) 88/100 72/100 HiRec 4.5/5 reviewed 5/5 2009 699discont. check
Olympus E-600 (⇒ lft | rgt) - - - - 4.5/5 2009 449discont. check
Olympus E-420 (⇒ lft | rgt) 85/100 HiRec 4/5 reviewed 4.5/5 2008 599discont. check
Olympus E-520 (⇒ lft | rgt) 87/100 HiRec 4.5/5 4/5 4.5/5 2008 699discont. check
Olympus E-30 (⇒ lft | rgt) - 71/100 HiRec 4.5/5 - 4/5 2008 1,299discont. check
Olympus E-510 (⇒ lft | rgt) 89/100 HiRec 3.5/5 reviewed 4.5/5 2007 799discont. check
Panasonic GX85 (⇒ lft | rgt) HiRec 82/100 Silver 5/5 4.5/5 5/5 2016 799 latest 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 GM1 (⇒ lft | rgt) Rec 78/100 Gold 5/5 4.5/5 4.5/5 2013 749discont. check
Panasonic GH3 (⇒ lft | rgt) HiRec 79/100 Gold 4.5/5 5/5 4.5/5 2012 1,299discont. check
Panasonic G3 (⇒ lft | rgt) 88/100 HiRec 75/100 Silver 4.5/5 4.5/5 5/5 2011 599discont. check
Panasonic GX1 (⇒ lft | rgt) 85/100 Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2011 949discont. check
Panasonic G2 (⇒ lft | rgt) - 72/100 Silver 4/5 4/5 4.5/5 2010 599discont. check
Panasonic GF1 (⇒ lft | rgt) 85/100 69/100 4.5/5 4.5/5 4.5/5 2009 749discont. check
Panasonic GH1 (⇒ lft | rgt) 89/100 HiRec 72/100 HiRec 4.5/5 5/5 4.5/5 2009 1,499discont. check

The above review scores should be interpreted with care, though. The ratings are only valid when refering to cameras in the same category and of the same age. 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 comparisons

If you would like to see a different side-by-side camera review, just use the search menu below. 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 send me an email, and I will try to update the database with the necessary infos.

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