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Olympus E-3 vs Sony A7

The Olympus E-3 and the Sony Alpha A7 are two digital cameras that were officially introduced, respectively, in October 2007 and October 2013. The E-3 is a DSLR, while the A7 is a mirrorless interchangeable lens camera. The cameras are based on a Four Thirds (E-3) and a full frame (A7) sensor. The Olympus has a resolution of 10 megapixels, whereas the Sony provides 24 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   Sony A7
Olympus E-3 Sony A7
Digital single lens reflex Mirrorless system camera
Four Thirds lenses Sony E mount lenses
10 MP, Four Thirds Sensor 24 MP, Full Frame Sensor
no Video 1080/60p Video
ISO 100-3200 ISO 100-25600 (50-51200)
Optical viewfinder Electronic viewfinder (2400k dots)
2.5" LCD, 230k dots 3.0" LCD, 1230k dots
Swivel screen (not touch-sensitive) Tilting screen (not touch-sensitive)
5 shutter flaps per second 5 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
750 shots per battery charge340 shots per battery charge
142 x 116 x 75 mm, 876 g 127 x 94 x 48 mm, 474 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-3 and the Sony Alpha A7? 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.

Body comparison: Olympus E-3 vs Sony A7

An illustration of the physical size and weight of the Olympus E-3 and the Sony A7 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth measures are rounded to the nearest millimeter.

Size Olympus E-3 vs Sony A7
Compare E-3 versus A7 top
Comparison E-3 or A7 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 is notably smaller (28 percent) than the Olympus E-3. Moreover, the A7 is substantially lighter (46 percent) than the E-3. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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 Four Thirds Lens Catalog (E-3) and the Sony FE Lens Catalog (A7). Mirrorless cameras, such as the A7, 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 BLM-1 battery, while the A7 can take 340 images on a single charge of its NP-FW50 power pack. The power pack in the A7 can be charged via the USB port, which can be very convenient when travelling.

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.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Olympus E-3» 5.6 in 4.6 in 3.0 in 30.9 oz 750 Y Oct 2007 1,699- i Olympus E-3
 
Sony A7« 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699- i Sony A7
 
Nikon D300« » 5.8 in 4.5 in 2.9 in 32.6 oz 1000 Y Aug 2007 1,799- i Nikon D300
 
Olympus E-5« » 5.6 in 4.6 in 3.0 in 30.8 oz 750 Y Sep 2010 1,699- i Olympus E-5
 
Olympus E-600« » 5.1 in 3.7 in 2.4 in 18.9 oz 500 n Aug 2009 449- i Olympus E-600
 
Olympus E-620« » 5.1 in 3.7 in 2.4 in 18.4 oz 500 n Feb 2009 699- i Olympus E-620
 
Olympus E-30« » 5.6 in 4.3 in 3.0 in 24.7 oz 750 n Nov 2008 1,299- i Olympus E-30
 
Olympus E-420« » 5.1 in 3.6 in 2.1 in 15.5 oz 500 n Mar 2008 599- i Olympus E-420
 
Olympus E-520« » 5.4 in 3.6 in 2.7 in 18.9 oz 750 n May 2008 699- i Olympus E-520
 
Olympus E-410« » 5.1 in 3.6 in 2.1 in 15.3 oz 500 n Mar 2007 699- i Olympus E-410
 
Olympus E-510« » 5.4 in 3.6 in 2.7 in 19.0 oz 750 n Mar 2007 799- i Olympus E-510
 
Olympus E-1« » 5.6 in 4.1 in 3.2 in 26.0 oz 750 Y Jun 2003 1,699- i Olympus E-1
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony A7S« » 5.0 in 3.7 in 1.9 in 17.2 oz 380 Y Apr 2014 2,499- i Sony A7S
 
Sony A7R« » 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299- i Sony A7R
 
Sony RX1R« » 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Jun 2013 2,799- i Sony RX1R
 
Sony RX1« » 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Sep 2012 2,799- i Sony RX1
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The two cameras under review were launched at the same price and fall into the same 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: Olympus E-3 vs Sony A7

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.

Of the two cameras under consideration, the Olympus E-3 features a Four Thirds sensor and the Sony A7 a full frame sensor. The sensor area in the A7 is 280 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the E-3 has a native 4:3 aspect ratio, while the one in the A7 offers a 3:2 aspect.

Olympus E-3 and Sony A7 sensor measures

With 24MP, the A7 offers a higher resolution than the E-3 (10MP), but the A7 nevertheless has larger individual pixels (pixel pitch of 5.97μm versus 4.74μm for the E-3) due to its larger sensor. Moreover, the A7 is a much more recent model (by 6 years) than the E-3, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A7 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Olympus E-3 are 18.2 x 13.7 inch or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inch or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inch or 30.9 x 23.2 cm for excellent quality prints.

The A7 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Olympus E-3 has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Sony Alpha A7 are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.

E-3 versus A7 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 A7 offers substantially better image quality than the E-3 (overall score 34 points higher). The advantage is based on 3.2 bits higher color depth, 3.7 EV in additional dynamic range, and 2 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
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Olympus E-3» Four Thirds 10.0 3648 2736-21.610.557156Olympus E-3
 
Sony A7« Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7
 
Nikon D300« » APS-C 12.2 4288 2848-22.112.067967Nikon D300
 
Olympus E-5« » Four Thirds 12.2 4032 3024720/30p21.610.551956Olympus E-5
 
Olympus E-600« » Four Thirds 12.2 4032 3024-21.510.354155Olympus E-600
 
Olympus E-620« » Four Thirds 12.2 4032 3024-21.310.353655Olympus E-620
 
Olympus E-30« » Four Thirds 12.2 4032 3024-21.310.453055Olympus E-30
 
Olympus E-420« » Four Thirds 10.0 3648 2736-21.510.452756Olympus E-420
 
Olympus E-520« » Four Thirds 10.0 3648 2736-21.410.454855Olympus E-520
 
Olympus E-410« » Four Thirds 10.0 3648 2736-21.110.049451Olympus E-410
 
Olympus E-510« » Four Thirds 10.0 3648 2736-21.210.044252Olympus E-510
 
Olympus E-1« » Four Thirds 4.9 2560 1920-----Olympus E-1
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony A7S« » Full Frame 12.0 4240 28321080/60p23.913.2370287Sony A7S
 
Sony A7R« » Full Frame 36.2 7360 49121080/60p25.614.1274695Sony A7R
 
Sony RX1R« » Full Frame 24.0 6000 40001080/60p25.013.6253791Sony RX1R
 
Sony RX1« » Full Frame 24.0 6000 40001080/60p25.114.3253493Sony RX1

Many modern cameras are not only capable of taking still images, but can also record movies. The A7 indeed provides for movie recording, while the E-3 does not. The highest resolution format that the A7 can use is 1080/60p.

 

Feature comparison: Olympus E-3 vs Sony A7

Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7 has an electronic viewfinder (2400k 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 A7 has a higher magnification than the one of the E-3 (0.71x vs 0.575x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Olympus E-3 and Sony A7 in connection with corresponding information for a sample of similar cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Olympus E-3»optical Y 2.5 230 swivel n 1/8000s 5.0 Y Y Olympus E-3
 
Sony A7«2400 n 3.0 1230 tilting n 1/8000s 5.0 n n Sony A7
 
Nikon D300« »optical Y 3.0 922 fixed n 1/8000s 6.0 Y n Nikon D300
 
Olympus E-5« »optical Y 3.0 920 swivel n 1/8000s 5.0 Y Y Olympus E-5
 
Olympus E-600« »optical n 2.7 230 swivel n 1/4000s 4.0 Y Y Olympus E-600
 
Olympus E-620« »optical n 2.7 230 swivel n 1/4000s 4.0 Y Y Olympus E-620
 
Olympus E-30« »optical Y 2.7 230 swivel n 1/8000s 5.0 Y Y Olympus E-30
 
Olympus E-420« »optical n 2.7 215 fixed n 1/4000s 3.5 Y n Olympus E-420
 
Olympus E-520« »optical n 2.7 215 fixed n 1/4000s 3.5 Y Y Olympus E-520
 
Olympus E-410« »optical n 2.5 215 fixed n 1/4000s 3.0 Y n Olympus E-410
 
Olympus E-510« »optical n 2.5 215 fixed n 1/4000s 3.0 Y Y Olympus E-510
 
Olympus E-1« »optical Y 1.8 134 fixed n 1/4000s 3.0 n n Olympus E-1
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony A7S« »2400 n 3.0 921 tilting n 1/8000s 5.0 n n Sony A7S
 
Sony A7R« »2400 n 3.0 1230 tilting n 1/8000s 4.0 n n Sony A7R
 
Sony RX1R« »- n 3.0 1229 fixed n 1/4000s 5.0 Y n Sony RX1R
 
Sony RX1« »- n 3.0 1229 fixed n 1/4000s 5.0 Y n Sony RX1

One difference between the cameras concerns the presence of an on-board flash. The E-3 has one, while the A7 does not. While the built-in flash of the E-3 is not very powerful, it can at times be useful as a fill-in light.

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 A7 does not have a selfie-screen.

The E-3 writes its imaging data to Compact Flash or xD Picture cards, while the A7 uses SDXC or Memory Stick PRO Duo cards. The E-3 features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7 only has one slot.

 

Connectivity comparison: Olympus E-3 vs Sony A7

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 Sony Alpha A7 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Olympus E-3»Y-----2.0---Olympus E-3
 
Sony A7«YstereomonoYYmicro2.0YY-Sony A7
 
Nikon D300« »Y----mini2.0---Nikon D300
 
Olympus E-5« »Ystereo---mini2.0---Olympus E-5
 
Olympus E-600« »Y-----2.0---Olympus E-600
 
Olympus E-620« »Y-----2.0---Olympus E-620
 
Olympus E-30« »Y-----2.0---Olympus E-30
 
Olympus E-420« »Y-----2.0---Olympus E-420
 
Olympus E-520« »Y-----2.0---Olympus E-520
 
Olympus E-410« »Y-----2.0---Olympus E-410
 
Olympus E-510« »Y-----2.0---Olympus E-510
 
Olympus E-1« »Y-----2.0---Olympus E-1
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony A7S« »YstereomonoYYmicro2.0YY-Sony A7S
 
Sony A7R« »YstereomonoYYmicro2.0YY-Sony A7R
 
Sony RX1R« »YstereomonoY-mini2.0---Sony RX1R
 
Sony RX1« »YstereomonoY-mini2.0---Sony RX1

It is notable that the A7 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 offer wifi capability.

Studio photographers will appreciate that the Olympus E-3 (unlike the A7) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the E-3 and the A7 have been discontinued, but can regularly be found used on eBay. The E-3 was replaced by the Olympus E-5, while the A7 was followed by the Sony A7 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Sony websites.


Review summary: Olympus E-3 vs Sony A7

So what is the bottom line? Which of the two cameras – the Olympus E-3 or the Sony A7 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Reasons to prefer 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 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 340) on a single battery charge.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • 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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Advantages of the Sony Alpha A7:

  • More detail: Has more megapixels (24 vs 10MP), which boosts linear resolution by 58%.
  • Better image quality: Scores substantially higher (34 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3.2 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (3.7 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/60p video.
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.71x vs 0.575x).
  • 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 (1230k vs 230k dots).
  • More compact: Is smaller (127x94mm vs 142x116mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 402g or 46 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • 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 modern: Reflects 6 years of technical progress since the E-3 launch.

If the count of individual advantages (bullet points above) is taken as a guide, the A7 is the clear winner of the contest (17 : 10 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-3 10:17 A7

How about other alternatives? Do the specifications of the Olympus E-3 and the Sony A7 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 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-3 or the A7 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: Olympus E-3 vs Sony A7

This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Olympus E-3»88/100+ +oo4/5 Oct 2007 1,699- i Olympus E-3
 
Sony A7«+ +80/1005/54.5/55/5 Oct 2013 1,699- i Sony A7
 
Nikon D300« »+ ++ +5/5o4.5/5 Aug 2007 1,799- i Nikon D300
 
Olympus E-5« »-75/1004/5-4.5/5 Sep 2010 1,699- i Olympus E-5
 
Olympus E-600« »----4.5/5 Aug 2009 449- i Olympus E-600
 
Olympus E-620« »88/10072/1004.5/5o5/5 Feb 2009 699- i Olympus E-620
 
Olympus E-30« »-71/1004.5/5-4/5 Nov 2008 1,299- i Olympus E-30
 
Olympus E-420« »85/100+ +4/5o4.5/5 Mar 2008 599- i Olympus E-420
 
Olympus E-520« »87/100+ +4.5/54/54.5/5 May 2008 699- i Olympus E-520
 
Olympus E-410« »86/100+ +4/5o4.5/5 Mar 2007 699- i Olympus E-410
 
Olympus E-510« »89/100+ +3.5/5o4.5/5 Mar 2007 799- i Olympus E-510
 
Olympus E-1« »-+oo- Jun 2003 1,699- i Olympus E-1
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony A7S« »-86/1004.5/54.5/55/5 Apr 2014 2,499- i Sony A7S
 
Sony A7R« »+ +82/1004.5/55/55/5 Oct 2013 2,299- i Sony A7R
 
Sony RX1R« »--4/5o4.5/5 Jun 2013 2,799- i Sony RX1R
 
Sony RX1« »-79/1004/54.5/54.5/5 Sep 2012 2,799- i Sony RX1
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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Olympus E-3:
Check Ebay offers
Sony A7:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? 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.

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    Specifications: Olympus E-3 vs Sony A7

    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 Sony A7
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Four Thirds lenses Sony E mount lenses
    Launch Date October 2007 October 2013
    Launch Price USD 1699 USD 1699
    Sensor Specs Olympus E-3 Sony A7
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.8 x 23.9 mm
    Sensor Area 224.9 mm2 855.62 mm2
    Sensor Diagonal 21.6 mm 43 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 10 Megapixels 24 Megapixels
    Image Resolution 3648 x 2736 pixels 6000 x 4000 pixels
    Pixel Pitch 4.74 μm 5.97 μm
    Pixel Density 4.44 MP/cm2 2.80 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60p Video
    ISO Setting 100-3200 ISO 100-25600 ISO
    ISO Boost no Enhancement 50-51200 ISO
    Image Processor TruePic III BIONZ X
    DXO Sensor Quality (score) 56 90
    DXO Color Depth (bits) 21.6 24.8
    DXO Dynamic Range (EV) 10.5 14.2
    DXO Low Light (ISO) 571 2248
    Screen Specs Olympus E-3 Sony A7
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.575x 0.71x
    Viewfinder Resolution 2400k dots
    Top-Level Screen Control Panel no Top Display
    LCD Framing Live View Live View
    Rear LCD Size 2.5 inch 3.0 inch
    LCD Resolution 230k dots 1230k dots
    LCD Attachment Swivel screen Tilting screen
    Shooting Specs Olympus E-3 Sony A7
    Autofocus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing AidNo Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/8000/s 1/8000/s
    Continuous Shooting 5 shutter flaps/s 5 shutter flaps/s
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium CF or XD cards MS or SDXC cards
    Second Storage Option Dual card slots Single card slot
    Connectivity Specs Olympus E-3 Sony A7
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Headphone Socket no Headphone port Headphone port
    Wifi Support no Wifi Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Body Specs Olympus E-3 Sony A7
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type BLM-1 power pack NP-FW50 power pack
    Battery Life (CIPA)750 shots per charge340 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 142 x 116 x 75 mm
    (5.6 x 4.6 x 3.0 in)
    127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 876 g (30.9 oz) 474 g (16.7 oz)

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