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Olympus E-420 vs Sony A7S

The Olympus E-420 and the Sony Alpha A7S are two digital cameras that were officially introduced, respectively, in March 2008 and April 2014. The E-420 is a DSLR, while the A7S is a mirrorless interchangeable lens camera. The cameras are based on a Four Thirds (E-420) and a full frame (A7S) sensor. The Olympus has a resolution of 10 megapixels, whereas the Sony provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Olympus E-420 versus Sony A7S
Olympus E-420 Sony A7S
Digital single lens reflex Mirrorless system camera
Four Thirds lenses Sony E mount lenses
10 MP, Four Thirds Sensor 12 MP, Full Frame Sensor
no Video 1080/60p Video
ISO 100-1,600 ISO 100-102,400 (50 - 409,600)
Optical viewfinder Electronic viewfinder (2400k dots)
2.7 LCD, 215k dots 3.0 LCD, 921k dots
Fixed screen (not touch-sensitive) Tilting screen (not touch-sensitive)
3.5 shutter flaps per second 5 shutter flaps per second
not weather sealedWeathersealed body
500 shots per battery charge380 shots per battery charge
130 x 91 x 53 mm, 440 g 127 x 94 x 48 mm, 489 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-420 and the Sony Alpha A7S? 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

The side-by-side display below illustrates the physical size and weight of the Olympus E-420 and the Sony A7S. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter.

Size Olympus E-420 vs Sony A7S
Compare E-420 versus A7S top
Comparison E-420 or A7S rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-420 and the Sony A7S are of equal size. However, the A7S is markedly heavier (11 percent) than the E-420. It is noteworthy in this context that the A7S is splash and dust-proof, while the E-420 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-420) and the Sony FE Lens Catalog (A7S). Mirrorless cameras, such as the A7S, 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-420 gets 500 shots out of its BLS-1 battery, while the A7S can take 380 images on a single charge of its NP-FW50 power pack. The power pack in the A7S can be charged via the USB port, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Olympus E-420 5.1 in 3.6 in 2.1 in 15.5 oz 500 n Mar 2008 599i
 
Sony A7S 5.0 in 3.7 in 1.9 in 17.2 oz 380 Y Apr 2014 2,499i
 
Nikon Df 5.7 in 4.3 in 2.6 in 26.8 oz 1400 Y Nov 2013 2,749i
 
Nikon D3000 5.0 in 3.8 in 2.5 in 18.9 oz 500 n Jul 2009 599i
 
Nikon D60 5.0 in 3.7 in 2.5 in 18.4 oz 500 n Jan 2008 629i
 
Nikon D40X 4.9 in 3.7 in 2.5 in 18.4 oz 520 n Mar 2007 729i
 
Olympus E-450 5.1 in 3.6 in 2.1 in 15.5 oz 500 n Mar 2009 499i
 
Olympus E-600 5.1 in 3.7 in 2.4 in 18.9 oz 500 n Aug 2009 449i
 
Olympus E-620 5.1 in 3.7 in 2.4 in 18.4 oz 500 n Feb 2009 699i
 
Olympus E-520 5.4 in 3.6 in 2.7 in 18.9 oz 750 n May 2008 699i
 
Olympus E-410 5.1 in 3.6 in 2.1 in 15.3 oz 500 n Mar 2007 699i
 
Olympus E-400 5.1 in 3.6 in 2.1 in 15.3 oz 500 n Sep 2006 699i
 
Panasonic L10 5.3 in 3.8 in 3.1 in 19.6 oz 450 n Aug 2007 599i
 
Sony A7S II 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999i
 
Sony A7 II 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999i
 
Sony A7 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699i
 
Sony A7R 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-420 was launched at a markedly lower price (by 76 percent) than the A7S, 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 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 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Olympus E-420 features a Four Thirds sensor and the Sony A7S a full frame sensor. The sensor area in the A7S 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-420 has a native 4:3 aspect ratio, while the one in the A7S offers a 3:2 aspect.

In terms of underlying technology, both cameras are build around CMOS sensors.

Olympus E-420 and Sony A7S sensor measures

With 12MP, the A7S offers a higher resolution than the E-420 (10MP), but the A7S nevertheless has larger individual pixels (pixel pitch of 8.45μm versus 4.74μm for the E-420) due to its larger sensor. Moreover, the A7S is a much more recent model (by 6 years and 1 month) than the E-420, 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 A7S implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7S for good quality output (200 dots per inch) amounts to 21.2 x 14.2 inches or 53.8 x 36 cm, for very good quality (250 dpi) 17 x 11.3 inches or 43.1 x 28.8 cm, and for excellent quality (300 dpi) 14.1 x 9.4 inches or 35.9 x 24 cm. The corresponding values for the Olympus E-420 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-420 has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Sony Alpha A7S are ISO 100 to ISO 102400, with the possibility to increase the ISO range to 50-409600.

E-420 versus A7S MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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 A7S offers substantially better image quality than the E-420 (overall score 31 points higher). The advantage is based on 2.4 bits higher color depth, 2.8 EV in additional dynamic range, and 2.8 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.

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Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
 
Nikon D3000 APS-C 10.0 3872 2592none22.311.156362
 
Nikon D60 APS-C 10.0 3872 2592none22.511.456265
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
 
Olympus E-450 Four Thirds 10.0 3648 2736none21.510.551256
 
Olympus E-600 Four Thirds 12.2 4032 3024none21.510.354155
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
 
Olympus E-520 Four Thirds 10.0 3648 2736none21.410.454855
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
 
Olympus E-400 Four Thirds 10.0 3648 2736none........
 
Panasonic L10 Four Thirds 10.0 3648 2736none21.310.842955
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695

Many modern cameras cannot only take still pictures, but also record videos. The A7S indeed provides for movie recording, while the E-420 does not. The highest resolution format that the A7S can use is 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7S has an electronic viewfinder (2400k dots), while the E-420 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 A7S offers a wider field of view (100%) than the one in the E-420 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the A7S has a higher magnification (0.71x 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-420 and Sony A7S along with similar information for a selection of comparators.

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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
 
Olympus E-420optical n 2.7 215 fixed n 1/4000s 3.5 Y n
 
Sony A7S2400 n 3.0 921 tilting n 1/8000s 5.0 n n
 
Nikon Dfoptical Y 3.2 921 fixed n 1/4000s 5.5 n n
 
Nikon D3000optical n 3.0 230 fixed n 1/4000s 3.0 Y n
 
Nikon D60optical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Nikon D40Xoptical n 2.5 230 fixed n 1/4000s 3.0 Y n
 
Olympus E-450optical n 2.7 215 fixed n 1/4000s 3.5 Y n
 
Olympus E-600optical n 2.7 230 swivel n 1/4000s 4.0 Y Y
 
Olympus E-620optical n 2.7 230 swivel n 1/4000s 4.0 Y Y
 
Olympus E-520optical n 2.7 215 fixed n 1/4000s 3.5 Y Y
 
Olympus E-410optical n 2.5 215 fixed n 1/4000s 3.0 Y n
 
Olympus E-400optical n 2.5 215 fixed n 1/4000s 3.0 Y n
 
Panasonic L10optical n 2.5 207 swivel n 1/4000s 3.0 Y n
 
Sony A7S II2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y
 
Sony A72400 n 3.0 1230 tilting n 1/8000s 5.0 n n
 
Sony A7R2400 n 3.0 1230 tilting n 1/8000s 4.0 n n

One difference between the cameras concerns the presence of an on-board flash. The E-420 has one, while the A7S does not. While the built-in flash of the E-420 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 A7S 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 E-420 writes its imaging data to Compact Flash or xD Picture cards, while the A7S uses SDXC or Memory Stick PRO Duo cards. The E-420 features dual card slots, which can be very useful in case a memory card fails. In contrast, the A7S only has one slot.

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-420 and Sony Alpha A7S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
 
Olympus E-420Y-----2.0---
 
Sony A7SYstereomonoYYmicro2.0YY-
 
Nikon DfY----mini2.0---
 
Nikon D3000Y-----2.0---
 
Nikon D60Y-----2.0---
 
Nikon D40XY-----2.0---
 
Olympus E-450Y-----2.0---
 
Olympus E-600Y-----2.0---
 
Olympus E-620Y-----2.0---
 
Olympus E-520Y-----2.0---
 
Olympus E-410Y-----2.0---
 
Olympus E-400Y-----2.0---
 
Panasonic L10Y-----2.0---
 
Sony A7S IIYstereomonoYYmicro2.0YY-
 
Sony A7 IIYstereomonoYYmicro2.0YY-
 
Sony A7YstereomonoYYmicro2.0YY-
 
Sony A7RYstereomonoYYmicro2.0YY-

It is notable that the A7S offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the E-420 does not provide wifi capability.

Both the E-420 and the A7S have been discontinued, but can regularly be found used on eBay. The A7S was replaced by the Sony A7S II, while the E-420 does not have a direct successor. 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

So how do things add up? Is there a clear favorite between the Olympus E-420 and the Sony A7S? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Olympus E-420:

  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Less heavy: Is lighter (by 49g or 10 percent) and hence easier to carry around.
  • Longer lasting: Can take more shots (500 versus 380) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More affordable: Was introduced into a lower priced category (76 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in March 2008).

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Arguments in favor of the Sony Alpha A7S:

  • More detail: Has more megapixels (12 vs 10MP), which boosts linear resolution by 12%.
  • Better image quality: Scores substantially higher (31 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.4 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.8 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (2.8 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.
  • 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 (0.71x vs 0.46x).
  • 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 (921k vs 215k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 3.5 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • 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 and 1 month of technical progress since the E-420 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A7S is the clear winner of the contest (20 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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-420 07:20 A7S

How about other alternatives? Do the specifications of the Olympus E-420 and the Sony A7S 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 technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-420 or the A7S. 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 why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Olympus E-42085/100+ +4/5o4.5/5 Mar 2008 599i
 
Sony A7S..86/1004.5/54.5/55/5 Apr 2014 2,499i
 
Nikon Df..81/1004/54/54/5 Nov 2013 2,749i
 
Nikon D3000+72/1004/53.5/54.5/5 Jul 2009 599i
 
Nikon D6080/100+ +4/5o4.5/5 Jan 2008 629i
 
Nikon D40X79/100+ +4/5o4/5 Mar 2007 729i
 
Olympus E-450....4/5..4/5 Mar 2009 499i
 
Olympus E-600........4.5/5 Aug 2009 449i
 
Olympus E-62088/10072/1004.5/5o5/5 Feb 2009 699i
 
Olympus E-52087/100+ +4.5/54/54.5/5 May 2008 699i
 
Olympus E-41086/100+ +4/5o4.5/5 Mar 2007 699i
 
Olympus E-40085/100..4/5..4/5 Sep 2006 699i
 
Panasonic L1085/100+3.5/5o4/5 Aug 2007 599i
 
Sony A7S II+..4.5/55/55/5 Sep 2015 2,999i
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999i
 
Sony A7+ +80/1005/54.5/55/5 Oct 2013 1,699i
 
Sony A7R+ +82/1004.5/55/55/5 Oct 2013 2,299i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The review scores listed above should be treated with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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-420:
Check Ebay offers
Sony A7S:
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-420 vs Sony A7S

    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-420 Sony A7S
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Four Thirds lenses Sony E mount lenses
    Launch Date March 2008 April 2014
    Launch Price USD 599 USD 2,499
    Sensor Specs Olympus E-420 Sony A7S
    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 12 Megapixels
    Image Resolution 3648 x 2736 pixels 4240 x 2832 pixels
    Pixel Pitch 4.74 μm 8.45 μm
    Pixel Density 4.44 MP/cm2 1.40 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60p Video
    ISO Setting 100 - 1,600 ISO 100 - 102,400 ISO
    ISO Boost no Enhancement 50 - 409,600 ISO
    Image Processor TruePic III BIONZ X
    DXO Sensor Quality (score) 56 87
    DXO Color Depth (bits) 21.5 23.9
    DXO Dynamic Range (EV) 10.4 13.2
    DXO Low Light (ISO) 527 3702
    Screen Specs Olympus E-420 Sony A7S
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.46x 0.71x
    Viewfinder Resolution 2400k dots
    LCD Framing Live View Live View
    Rear LCD Size 2.7inch 3.0inch
    LCD Resolution 215k dots 921k dots
    LCD Attachment Fixed screen Tilting screen
    Shooting Specs Olympus E-420 Sony A7S
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 3.5 shutter flaps/s 5 shutter flaps/s
    Electronic Shutterno E-ShutterYES
    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-420 Sony A7S
    External Flash Hotshoe Hotshoe
    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-420 Sony A7S
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type BLS-1 NP-FW50
    Battery Life (CIPA)500 shots per charge380 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 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 440 g (15.5 oz) 489 g (17.2 oz)

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