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Sony A7R III vs Olympus E-420 Comparison

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Camera to replace
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Sony A7R III

42 MP | Full frame (35.9 x 24 mm) BSI-CMOS Sensor

Sony A7R III
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Olympus E-420

10 MP | Four Thirds (17.3 x 13 mm) CMOS Sensor

Olympus E-420
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Sony A7R III vs Olympus E-420 Comparison Overview

Here we are comparing two cameras with different body types: Sony A7R III, which was introduced in October 2017 is a Pro Mirrorless camera with a 42.0MP Full frame sensor whereas Olympus E-420, which was introduced in June 2008 is a Entry-Level DSLR camera with a 10.0MP Four Thirds sensor. As you can see, E-420 is 9 years older than A7R III. Let's see if this age difference between two cameras makes a big difference.

Despite some fundamental differences of these two body types, Mirrorless cameras are becoming serious alternatives to DSLR cameras thanks to their size/weight advantages and recent improvements in their focus speeds , which makes this comparison even more interesting.

Here is a brief look at the main features of the Sony A7R III and Olympus E-420 before getting into our more detailed comparison.

Sony A7R III Key Specs

  • Announcement Date: 2017-10-25
  • 42MP - Full frame BSI-CMOS Sensor
  • No Anti-aliasing (AA) filter
  • ISO 100 - 32000 ( expands to 50 - 102400)
  • Sony E Mount
  • Sensor-shift Image Stabilization
  • 3.00" Tilting Screen
  • 3686k dot Electronic viewfinder
  • 10.0fps continuous shooting
  • 4K (UHD) - 3840 x 2160 video resolution
  • Built-in Wireless
  • 657g. 127 x 96 x 74 mm
  • Weather-sealed Body
  • Replaced Sony Alpha A7R II Compare

Olympus E-420 Key Specs

  • Announcement Date: 2008-06-23
  • 10MP - Four Thirds CMOS Sensor
  • ISO 100 - 1600
  • Four Thirds Mount
  • 2.70" Fixed Type Screen
  • Optical (pentamirror) viewfinder
  • 4.0fps continuous shooting
  • No Video Mode
  • 426g. 130 x 91 x 53 mm
  • Replaced Olympus E-410 Compare

Sony A7R III was replaced by Sony Alpha A7R IV. You may also be interested in these comparisons:
Sony Alpha A7R IV vs Sony Alpha A7R III
Sony Alpha A7R IV vs Olympus E-420

Let's read on in the following sections in order to better understand in detail how the Sony A7R III and Olympus E-420 compare and hopefully end up with enough arguments to decide which one is better for you.


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Sony A7R III Sony A7R III
See at AMAZON
Olympus E-420 Olympus E-420
See at AMAZON
Sony A7R III
See at AMAZON
Olympus E-420
See at AMAZON
Reasons to choose Sony Alpha A7R III over Olympus E-420
Wireless Connection
Built-In vs None Better connectivity
In-built Image Stabilization
Sensor-shift vs None Sharper images at longer focal lengths and slow shutter speeds
LCD Screen
Tilting vs Fixed Type Flexible shooting positions
Touch Screen
Yes vs No Easy control of camera functions
Viewfinder Magnif.
0.78x vs 0.46x Larger Viewfinder
Face Detection Focus
Yes vs No very handy for portraits
Sensor Resolution
42 MP vs 10 MP 320% more pixels
Max ISO
32.000 vs 1.600 1900% higher Max ISO
Number of Focus Points
425 vs 3 422 more focus points
LCD Screen Size
3″ vs 2.7" 0.3 inches larger display
LCD Resolution
1.440k dots vs 230k dots 526% higher resolution screen
Viewfinder Coverage
100% vs 95% More accurate viewfinder
Max Mech. Shutter
1/8000s vs 1/4000s faster mechanical shutter
Continuous Shooting
10.0fps vs 4.0fps 6 fps faster
Battery Life
650 shots vs 500 shots 150 more frames with a single charge
Microphone Port
Yes vs No High quality audio recording option
Headphone Port
Yes vs No better video control
Environmental Sealing
Yes vs No shoot at tough conditions
Timelapse Recording
Yes vs No creative shooting
Color Depth
26.0 vs 21.5 higher color depth
Dynamic Range
14.7 vs 10.4 higher dynamic range
Low Light ISO
3523 vs 527 better High ISO performance
Max Video Resolution
3840 x 2160 vs None Higher Resolution Video
AE Bracketing
Yes vs No Useful for tough lighting conditions and HDR
Flash Sync Port
Yes vs No Connect off-camera flash
NFC Connection
Yes vs No Easy wireless connectivity with compatible devices
Pixel Shift High-Res Mode
Yes (169. 6) vs No Increased resolution with pixel shift
Bluetooth
Yes vs No Connect your camera to other devices via Blueetooth
Storage Slot
2 vs 1 Extra storage slot
Smartphone Remote
Yes vs No Remote control your camera with a smartphone
UHS Card Support
UHS-II vs none Read/Write in High Speeds
USB Version
USB 3.1 Gen 1(5 GBit/sec) vs USB 2.0 (480 Mbit/sec) Faster Data transfer from the camera
Animal Eye AF Tracking
Yes vs No Easily lock and track focus on animals
Webcam Function
Yes vs No Use your camera as a Webcam
Anti Flicker
Yes vs No Reduced uneven color and exposure under flickering light
Eye Tracking Focus
Yes vs No Autofocus system locks on the eye and tracks the subject
CHECK A7R III PRICE


Reasons to choose Olympus E-420 over Sony Alpha A7R III
Built-in Flash
Yes vs No Useful in low-light
Weight
426 g vs 657 g 231 g lighter
Sensor Pixel Area
22.54µm2 vs 20.43µm2 10% larger pixel area
CHECK E-420 PRICE

Common Strengths of Sony Alpha A7R III and Olympus E-420
External Flash Shoe
Yes vs Yes Better for flash photography
Viewfinder
Yes (Electronic) vs Yes (Optical) Better framing and control
RAW Support
Yes vs Yes Better image quality
Common Weaknesses of Sony Alpha A7R III and Olympus E-420
Sony A7R III vs Olympus E-420: Physical Specs and Body Features Comparison

Size and weight are big decision factors when you are trying to find the ideal camera for your needs. In this section, we are going to illustrate the Sony A7R III and Olympus E-420 side-by-side from the front, back and top in their relative dimensions. Sony A7R III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 657 g (1.45 lb / 23.17 oz) (including batteries). Olympus E-420 has external dimensions of 130 x 91 x 53 mm (5.12 x 3.58 x 2.09″) and weighs 426 g (0.94 lb / 15.03 oz) (including batteries).

Below you can see the front-view size comparison of the Sony A7R III and the Olympus E-420. Olympus E-420 is 5mm shorter and 21mm thinner than Sony A7R III but it is also 3mm wider.

Sony A7R III vs Olympus E-420 Camera Size Comparison - Front View
Comparison image of the Sony A7R III and the Olympus E-420 Size, Weight and External Dimensions - Front View

Weight is another important factor, especially when deciding on a camera that you want to carry with you all day. Olympus E-420 is significantly lighter (231g ) than the Sony A7R III which may become a big advantage especially on long walking trips.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since Sony A7R III has a Full frame sensor and Olympus E-420 has a smaller Four Thirds sensor, Olympus E-420's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7R III lenses.

Weight Comparison

DSLR Cameras

A7R III
E-420
Min
Average
Max
Thickness Comparison

DSLR Cameras

A7R III
E-420
Min
Average
Max

Weather Sealing

With its weather-sealed body, we believe that the A7R III has a big advantage over the E-420 which doesn't provide any kind of environmental sealing.

LCD Screen Size and Features

Sony A7R III's 3.00" LCD screen is slightly larger than Olympus E-420's 2.7" screen.

In addition to the size advantage, Sony A7R III LCD screen also has a Tilting feature where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. On the other hand, Olympus E-420 has a fixed type screen which provides less flexibility in shooting positions compared to A7R III.


Sony A7R III vs Olympus E-420: Sensor Comparison

Sony A7R III has a 42.0MP Full frame (35.9 x 24 mm ) sized BSI-CMOS sensor and features Bionz X processor. On the other hand, Olympus E-420 has a 10.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic III processor.

Sony A7R III's sensor provides 32MP more than Olympus E-420's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely. On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.

Another difference between these two cameras is that Sony A7R III's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.

Below you can see the A7R III and E-420 sensor size comparison.

Sony A7R III vs Olympus E-420 Sensor Size Comparison
Sensor Size and Resolution Comparison image of Sony A7R III and Olympus E-420 Cameras


As seen above, Sony A7R III has a 3.8x Larger sensor area than Olympus E-420. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

DxOMark Sensor Scores

Both Sony A7R III and Olympus E-420 sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, A7R III has scored 100, 44 points higher than E-420.

Model Overall Color Depth Dynamic Range Low-light ISO
Sony A7R III 100 26.0 bits 14.7 Evs 3523 ISO
Olympus E-420 56 21.5 bits 10.4 Evs 527 ISO
Sony A7R III vs Olympus E-420 Comparison of Available Lenses
Which camera has more lenses?

The number of available lenses is a big deciding factor when choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that the Sony A7R III has an advantage over the Olympus E-420. There are 201 lenses for the Sony A7R III's Sony E mount, but on the other hand, there are only 47 lenses for the Olympus E-420's Four Thirds lens mount.

Another important factor is the availability of image stabilization. Sony A7R III has a big advantage in this regard because it has a sensor based image stabilization (IS) which means that all the lenses mounted to this body will be stabilized. A7R III's built-in Image stabilization system is effective for compensating vibration up to 5.0-stops according to CIPA standards.
On the other hand, Olympus E-420 doesn't have this feature so you have to buy a lens with optical stabilization feature. Currently there are 3 lenses for Four Thirds mount with Optical Image Stabilization features.

Lens Type # of Sony A7R III Lenses # of Olympus E-420 Lenses
Standard Zoom 19 (14 Full Frame) 8
Standard Prime 34 (21 Full Frame) 5
Wideangle Zoom 16 (12 Full Frame) 4
Wideangle Prime 61 (42 Full Frame) 9
Telephoto Zoom 19 (17 Full Frame) 6
Telephoto Prime 28 (21 Full Frame) 5
SuperZoom 10 (2 Full Frame) 2
Wideangle Fisheye Prime 2 (0 Full Frame) 3
Macro Prime 9 (8 Full Frame) 4
Perspective Control Prime 2 (2 Full Frame) n/a
Telephoto Mirror Prime n/a 1
TOTAL 201 (139 Full Frame) 47

What types of Photography are Sony A7R III and Olympus E-420 Good for?
In this section, we rank and compare Sony A7R III and Olympus E-420 for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Sony A7R III for Portrait Photography

GOOD

Olympus E-420 for Portrait Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Read the details

Check the Best Sony E Mount Lenses for Portrait Photography
Large Four Thirds (17.3 x 13 mm) sensor
Optical Built-in Viewfinder
Good Ergonomics&Handling
Very Low Resolution Sensor: 10.0MP
No Image Stabilization
Read the details

Check the Best Four Thirds Mount Lenses for Portrait Photography

Sony A7R III for Street Photography

EXCELLENT

Olympus E-420 for Street Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Image Stabilization
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Tilting LCD Screen
Medium sized Body
Read the details

Check the Best Sony E Mount Lenses for Street Photography
Large Four Thirds (17.3 x 13 mm) sensor
Optical Built-in Viewfinder
Live-view
No Image Stabilization
Large Body
Read the details

Check the Best Four Thirds Mount Lenses for Street Photography

Sony A7R III for Sports Photography

GOOD

Olympus E-420 for Sports Photography

GOOD
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Fast Continuous Shooting: 10.0fps
Anti Flicker feature
Environmental Sealings
Fast Max shutter speed: 1/8000s
425 Focus Points
Good Battery Life: 650 shots
Good Low Light ISO
Wireless Connection
Read the details

Check the Best Sony E Mount Lenses for Sports Photography
Optical Built-in Viewfinder
Good Ergonomics&Handling
Fast Max shutter speed: 1/4000s
Average Continuous Shooting: 4.0fps
No Image Stabilization
Environmental Sealings
3 Focus Points
Read the details

Check the Best Four Thirds Mount Lenses for Sports Photography

Sony A7R III for Daily Photography

EXCELLENT

Olympus E-420 for Daily Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Anti Flicker feature
Environmental Sealings
Medium size Body
657g
Body Thickness 74mm
Read the details
Large Four Thirds (17.3 x 13 mm) sensor
Large Body
426g
Body Thickness 53mm
Read the details

Sony A7R III for Landscape Photography

GOOD

Olympus E-420 for Landscape Photography

POOR
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Environmental Sealings
Live-view
Read the details

Check the Best Sony E Mount Lenses for Landscape Photography
Large Four Thirds (17.3 x 13 mm) sensor
Live-view
Very Low Resolution Sensor: 10.0MP
No Environmental Sealings
Read the details

Check the Best Four Thirds Mount Lenses for Landscape Photography

Sony A7R III vs Olympus E-420: OUR DECISION

You may have already made your decision about which camera suits better for your needs and your budget so far, but in case you wonder how we rated Sony A7R III and Olympus E-420, below you can find their scores in five different aspects. Our Decision Algorithm dynamically scores cameras using 69 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Sony A7R III and Olympus E-420 scores compare:

Sony A7R III
Imaging
Features
Value
Portability
Overall
Ranked #10 out of 117 in SLR-style mirrorless cameras
Ranked #12 out of 1275 in all Cameras
Olympus E-420
Imaging
Features
Value
Portability
Overall
Ranked #67 out of 80 in Compact SLR cameras
Ranked #578 out of 1275 in all Cameras

Sony A7R III is the overall winner of this comparison. It has a higher Overall Score and beats Olympus E-420 in all criteria except one: Portability. But the size difference between these cameras are negligible in real world so it is not a big disadvantage for Sony A7R III.

Sony A7R III
Sony A7R III
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CHECK PRICE
Olympus E-420
Olympus E-420
CHECK PRICE
CHECK PRICE
Olympus E-420 vs Sony A7R III Specs Table
Detailed comparison of specifications
General Sony Alpha A7R III Olympus E-420
Brand Sony Olympus
Announced 2017-10-25 2008-06-23
Body Type SLR-style mirrorless Compact SLR
Sensor
Type BSI-CMOS CMOS
Size Full frame Four Thirds
Dimensions 35.9 x 24 mm 17.3 x 13 mm
Area 861.60mm2 224.90mm2
Megapixels 42 megapixels 10 megapixels
Max Resolution 7952 x 5304 3648 x 2736
Max Native Light sensitivity 32,000 ISO 1,600 ISO
Max Boosted Light Sensitivity 102400 ISO -
Min Native Light sensitivity 100 ISO 100 ISO
Min Boosted Light Sensitivity 50 ISO -
RAW Support
Autofocus
AF Touch
AF Continuous
AF Single
AF Tracking
AF Selective
AF Center
AF Multi Area
AF Live View
AF Face Detection
AF Contrast Detection
AF Phase Detection
Number of Focus Points 425 3
Lens
Manual Focus
Lens Mount Sony E Four Thirds
Number of Available Lenses 201 47
Screen
Type Tilting Fixed type
Size 3.00" 2.70"
Resolution 1,440k dots 230k dots
Touch Screen
Viewfinder
Viewfinder Electronic Optical (pentamirror)
Viewfinder Resolution 3,686k dots no electronic viewfinder
Viewfinder Coverage 100% 95%
Viewfinder Magnification 0.78x 0.46x
Photography Features
Max Mechanical Shutter 1/8000s 1/4000s
Shutter Priority
Aperture Priority
Manual Exposure Mode
Custom White Balance
Built-in Image Stabilization Sensor-shift No
Built-in Flash
Flash Range no built-in flash 12.00 m (at ISO 100)
Max Flash Sync n/a 1/180s
External Flash
Continuous Shooting 10.0 fps 4.0 fps
Multi-Segment Metering
Average Metering
Spot Metering
Partial Metering
AF-Area Metering
Center Weighted Metering
AE Bracketing
WB Bracketing
Video Features
Max Video Resolution 3840 x 2160 None
Video Formats MPEG-4, AVCHD, XAVC S n/a
Microphone Port
Headphone Port
Connectivity
Wireless Connectivity Built-In None
HDMI
Physical
Environmental Sealing
Weight 657g 426g
Dimensions 127 x 96 x 74mm 130 x 91 x 53mm
Battery Life 650 shots 500 shots
Other Features
Timelapse Recording
GPS None None
DxO Sensor Scores
DxO Overall Score 100 56
DxO Color Depth 26.0 21.5
DxO Dynamic Range 14.7 10.4
DxO Low Light ISO 3523 527
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