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Olympus E-400 vs Sony A7 III

The Olympus E-400 and the Sony Alpha A7 III are two digital cameras that were officially introduced, respectively, in September 2006 and February 2018. The E-400 is a DSLR, while the A7 III is a mirrorless interchangeable lens camera. The cameras are based on a Four Thirds (E-400) and a full frame (A7 III) 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-400
versus
Sony A7 III
Olympus E-400   Sony A7 III
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 4K/30p Video
ISO 100-1,600 ISO 100-51,200 (50 - 204,800)
Optical viewfinder Electronic viewfinder (2359k dots)
2.5" LCD – 215k dots 3.0" LCD – 922k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
3 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
500 shots per battery charge610 shots per battery charge
130 x 91 x 53 mm, 435 g 127 x 96 x 74 mm, 650 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-400 and the Sony Alpha A7 III? 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

The physical size and weight of the Olympus E-400 and the Sony A7 III 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 size dimensions are rounded to the nearest millimeter.

Size Olympus E-400 vs Sony A7 III
Compare E-400 versus A7 III top
Comparison E-400 or A7 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 III is somewhat larger (3 percent) than the Olympus E-400. Moreover, the A7 III is substantially heavier (49 percent) than the E-400. It is noteworthy in this context that the A7 III is splash and dust-proof, while the E-400 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. 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-400) and the Sony FE Lens Catalog (A7 III). Mirrorless cameras, such as the A7 III, 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-400 gets 500 shots out of its Olympus BLS-1 battery, while the A7 III can take 610 images on a single charge of its Sony NP-FZ100 power pack. The power pack in the A7 III can be charged via the USB port, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons 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-400 130 mm 91 mm 53 mm 435 g 500 n Sep 2006 699ebay.com
2.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 1,999 amazon.com
3.
 
Nikon Z6 134 mm 101 mm 67 mm 675 g 310 Y Aug 2018 1,999ebay.com
4.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
5.
 
Olympus E-P3 122 mm 69 mm 34 mm 369 g 330 n Jun 2011 799ebay.com
6.
 
Olympus E-PL2 114 mm 72 mm 42 mm 362 g 280 n Jan 2011 599ebay.com
7.
 
Olympus E-450 130 mm 91 mm 53 mm 440 g 500 n Mar 2009 499ebay.com
8.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
9.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 n Mar 2008 599ebay.com
10.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
11.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
12.
 
Olympus E-500 130 mm 95 mm 66 mm 479 g 750 n Sep 2005 599ebay.com
13.
 
Panasonic L10 135 mm 96 mm 78 mm 556 g 450 n Aug 2007 599ebay.com
14.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
15.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
16.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499ebay.com
17.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.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 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 E-400 was launched at a markedly lower price (by 65 percent) than the A7 III, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

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. 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 Olympus E-400 features a Four Thirds sensor and the Sony A7 III a full frame sensor. The sensor area in the A7 III is 276 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-400 has a native 4:3 aspect ratio, while the one in the A7 III offers a 3:2 aspect.

Olympus E-400 and Sony A7 III sensor measures

With 24MP, the A7 III offers a higher resolution than the E-400 (10MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 4.74μm for the E-400) due to its larger sensor. Moreover, the A7 III is a much more recent model (by 11 years and 5 months) than the E-400, 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 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Olympus E-400 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 A7 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Olympus E-400 has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Sony Alpha A7 III are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

In terms of underlying technology, the E-400 is build around a CMOS sensor, while the A7 III uses a BSI-CMOS imager. 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-400 versus A7 III MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. 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-400 Four Thirds 10.0 3648 2736none21.010.612753
2.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
3.
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
4.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
5.
 
Olympus E-P3 Four Thirds 12.2 4032 30241080/60i20.810.153651
6.
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
7.
 
Olympus E-450 Four Thirds 10.0 3648 2736none21.510.551256
8.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
9.
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
10.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
11.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
12.
 
Olympus E-500 Four Thirds 8.0 3264 2448none20.710.34551
13.
 
Panasonic L10 Four Thirds 10.0 3648 2736none21.310.842955
14.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
15.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
16.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
17.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
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 A7 III indeed provides for movie recording, while the E-400 does not. The highest resolution format that the A7 III can use is 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A7 III has an electronic viewfinder (2359k dots), while the E-400 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 viewfinder in the A7 III offers a wider field of view (100%) than the one in the E-400 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7 III has a higher magnification (0.78x vs 0.46x), 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-400 and Sony A7 III 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-400optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
2.
 
Sony A7 III2359 n3.0 / 922 tilting Y 1/8000s 10.0/s n Y
3.
 
Nikon Z63690 Y3.2 / 2100 tilting Y 1/8000s 12.0/s n Y
4.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
5.
 
Olympus E-P3optional n3.0 / 614 fixed Y 1/4000s 3.0/s Y Y
6.
 
Olympus E-PL2optional n3.0 / 460 fixed n 1/4000s 3.0/s Y Y
7.
 
Olympus E-450optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
8.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
9.
 
Olympus E-420optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
10.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
11.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
12.
 
Olympus E-500optical n2.5 / 215 fixed n 1/4000s 2.5/s Y n
13.
 
Panasonic L10optical n2.5 / 207 swivel n 1/4000s 3.0/s Y n
14.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
17.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The E-400 has one, while the A7 III does not. While the built-in flash of the E-400 is not very powerful, it can at times be useful as a fill-in light.

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 A7 III 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 Sony A7 III 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-400 writes its imaging data to Compact Flash or xD Picture cards, while the A7 III uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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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-400 and Sony Alpha A7 III 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-400Y- / ----2.0---
2.
 
Sony A7 IIIYstereo / monoYYmicro3.1YYY
3.
 
Nikon Z6Ystereo / monoYYmicro3.1Y-Y
4.
 
Nikon D40XY- / ----2.0---
5.
 
Olympus E-P3Ystereo / ---mini2.0---
6.
 
Olympus E-PL2Ystereo / ---mini2.0---
7.
 
Olympus E-450Y- / ----2.0---
8.
 
Olympus E-620Y- / ----2.0---
9.
 
Olympus E-420Y- / ----2.0---
10.
 
Olympus E-410Y- / ----2.0---
11.
 
Olympus E-510Y- / ----2.0---
12.
 
Olympus E-500Y- / ----2.0---
13.
 
Panasonic L10Y- / ----2.0---
14.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
15.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
16.
 
Sony A9Ystereo / monoYYmicro2.0YYY
17.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
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It is notable that the A7 III offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the E-400 does not provide wifi capability.

The A7 III is a recent model that features in the current product line-up of Sony. In contrast, the E-400 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-400 was succeeded by the Olympus E-410. Further information on the features and operation of the E-400 and A7 III can be found, respectively, in the Olympus E-400 Manual (free pdf) or the online Sony A7 III Manual.

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Review summary

So what is the bottom line? Is the Olympus E-400 better than the Sony A7 III or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Olympus E-400:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Less heavy: Is lighter (by 215g or 33 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (65 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in September 2006).

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Arguments in favor of the Sony Alpha A7 III:

  • More detail: Has more megapixels (24 vs 10MP), which boosts linear resolution by 58%.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • Broader imaging potential: Can capture not only stills but also 4K/30p 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.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.46x).
  • 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 (922k vs 215k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Longer lasting: Gets more shots (610 versus 500) out of a single battery charge.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • 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.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More modern: Reflects 11 years and 5 months of technical progress since the E-400 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7 III is the clear winner of the contest (28 : 5 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-400 05:28 A7 III

How about other alternatives? Do the specifications of the Olympus E-400 and the Sony A7 III 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-400 or the A7 III. 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

This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera 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-400..85/100....4/54/5 Sep 2006 699ebay.com
2.
 
Sony A7 III..+ +4.5/589/1005/55/5 Feb 2018 1,999 amazon.com
3.
 
Nikon Z65/5..5/589/1004.5/55/5 Aug 2018 1,999ebay.com
4.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
5.
 
Olympus E-P3..83/100..74/1004.5/54.5/5 Jun 2011 799ebay.com
6.
 
Olympus E-PL23/583/100..71/1004.5/54.5/5 Jan 2011 599ebay.com
7.
 
Olympus E-450........4/54/5 Mar 2009 499ebay.com
8.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
9.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 599ebay.com
10.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
11.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
12.
 
Olympus E-500..76/100..+ +.... Sep 2005 599ebay.com
13.
 
Panasonic L10..85/100..+3.5/54/5 Aug 2007 599ebay.com
14.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
15.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
16.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 4,499ebay.com
17.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, 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.

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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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Olympus E-400 vs Sony A7 III

    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-400 Sony A7 III
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Four Thirds lenses Sony E mount lenses
    Launch Date September 2006 February 2018
    Launch Price USD 699 USD 1,999
    Sensor Specs Olympus E-400 Sony A7 III
    Sensor Technology CMOS BSI-CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.6 x 23.8 mm
    Sensor Area 224.9 mm2 847.28 mm2
    Sensor Diagonal 21.6 mm 42.8 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 5.94 μm
    Pixel Density 4.44 MP/cm2 2.83 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 4K/30p Video
    ISO Setting 100 - 1,600 ISO 100 - 51,200 ISO
    ISO Boost no Enhancement 50 - 204,800 ISO
    Image Processor TruePic BIONZ X
    DXO Sensor Quality (score) .. 96
    DXO Color Depth (bits) .. 25.0
    DXO Dynamic Range (EV) .. 14.7
    DXO Low Light (ISO) .. 3730
    Screen Specs Olympus E-400 Sony A7 III
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.46x 0.78x
    Viewfinder Resolution 2359k dots
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 215k dots 922k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Olympus E-400 Sony A7 III
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 3 shutter flaps/s 10 shutter flaps/s
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF or XD cards MS or SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    Connectivity Specs Olympus E-400 Sony A7 III
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 3.1
    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
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Olympus E-400 Sony A7 III
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Olympus BLS-1 Sony NP-FZ100
    Battery Life (CIPA)500 shots per charge610 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 130 x 91 x 53 mm
    (5.1 x 3.6 x 2.1 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 435 g (15.3 oz) 650 g (22.9 oz)
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    Check E-400 offers at
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    Check A7 III price at
    amazon.com

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