Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Sony A7S and Olympus E-P3 side-by-side from the front, back and top in their relative dimensions. Sony A7S has external dimensions of 127 x 94 x 48 mm (5 x 3.7 x 1.89″) and weighs 489 g (1.08 lb / 17.25 oz) (including batteries). Olympus E-P3 has external dimensions of 122 x 69 x 34 mm (4.8 x 2.72 x 1.34″) and weighs 369 g (0.81 lb / 13.02 oz) (including batteries).
Below you can see the front view size comparison of Sony A7S and Olympus E-P3. Olympus E-P3 is clearly the smaller of the two cameras. Its body is 5mm narrower, 25mm shorter and 14mm thinner than Sony A7S.
![Sony A7S vs Olympus E-P3 Camera Size Comparison - Front View]()
Comparison image of Sony A7S and Olympus E-P3 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of Sony A7S and Olympus E-P3.
![Sony A7S vs Olympus E-P3 Camera Size Comparison - Back View]()
Comparison image of Sony A7S and Olympus E-P3 Size and Weight - Back View
Now lets look at the top view comparison of Sony A7S and Olympus E-P3.
![Sony A7S vs Olympus E-P3 Camera Size Comparison - Top View]()
Top View Comparison image of Sony A7S and Olympus E-P3 Size
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus E-P3 is significantly lighter (120g ) than the Sony A7S 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 have to also take into account the lenses that you will be using with these bodies. Since Sony A7S has a Full frame sensor and Olympus E-P3 has a smaller Four Thirds sensor, Olympus E-P3's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7S lenses.
Weight Comparison
Mirrorless Cameras
Thickness Comparison
Mirrorless Cameras
Weather Sealing
With its weather sealed body, we believe that A7S has a big advantage over E-P3 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Sony A7S and Olympus E-P3's LCD screens has the same diagonal size of 3.
On the other hand, Sony A7S features a
Tilting screen where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Olympus E-P3 has a fixed type screen which provides less flexibility in shooting positions compared to A7S.
Both Sony A7S and Olympus E-P3 have 12.0 MP resolution sensors but Sony A7S's sensor is Full frame (35.8 x 23.9 mm ) and Olympus E-P3's sensor is Four Thirds (17.3 x 13 mm ).
Since Sony A7S's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Olympus E-P3.
Below you can see the A7S and E-P3 sensor size comparison.
![Sony A7S vs Olympus E-P3 Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Sony A7S and Olympus E-P3 Cameras
As seen above, Sony A7S has a 3.8x Larger sensor area than Olympus E-P3. 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 A7S and Olympus E-P3 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, A7S has scored 87, 36 points higher than E-P3.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Sony A7S |
87 |
23.9 bits |
13.2 Evs |
3702 ISO |
|
Olympus E-P3 |
51 |
20.8 bits |
10.1 Evs |
536 ISO |
Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Sony A7S has an advantage over Olympus E-P3. There are 122 lenses for Sony A7S's Sony E mount, on the other hand there are only 107 lenses for Olympus E-P3's Micro Four Thirds lens mount.
Another important factor is the availability of image stabilization. Olympus E-P3 has a big advantage in this regard because it has a sensor based image stabilization which means that all the lenses mounted to this body will be stabilized. On the other hand, Sony A7S doesn't have this feature so you have to buy a lens with optical stabilization feature. Currently there are 30 lenses for Sony E mount with Optical Image Stabilization features.
| Lens Type |
# of Sony A7S Lenses |
# of Olympus E-P3 Lenses |
| Standard Zoom |
11 (8 Full Frame) |
15 |
| Standard Prime |
18 (9 Full Frame) |
13 |
| Wideangle Zoom |
7 (6 Full Frame) |
5 |
| Wideangle Prime |
39 (23 Full Frame) |
29 |
| Telephoto Zoom |
9 (7 Full Frame) |
18 |
| Telephoto Prime |
18 (14 Full Frame) |
9 |
| SuperZoom |
8 (1 Full Frame) |
8 |
| Wideangle Fisheye Prime |
2 (0 Full Frame) |
5 |
| Macro Prime |
8 (7 Full Frame) |
4 |
| Perspective Control Prime |
2 (2 Full Frame) |
n/a |
| Telephoto Mirror Prime |
n/a |
1 |
| TOTAL |
122 (77 Full Frame) |
107 |
Now let's compare some sample lenses from each mount with typical Focal ranges for Sony A7S and Olympus E-P3 to see how these lenses compares:
Fast Standard Zoom Lenses
Fast Tele Zoom Equivalent Lenses
Fast Normal Prime Equivalent Lenses
Fast Wideangle Zoom Equivalent Lenses
24-105mm f4 Equivalent Lenses
Super-Tele Zoom Equivalent Lenses
In this section, we rank and compare Sony A7S and Olympus E-P3 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 A7S for Portrait Photography
Olympus E-P3 for Portrait Photography
Large Full frame (35.8 x 23.9 mm) sensor
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Average Resolution Sensor: 12.0MP
No Image Stabilization
Read the details
Large Four Thirds (17.3 x 13 mm) sensor
Image Stabilization
Average Resolution Sensor: 12.0MP
Optional External Viewfinder
Average Ergonomics&Handling
Read the details
Sony A7S for Street Photography
Olympus E-P3 for Street Photography
Large Full frame (35.8 x 23.9 mm) sensor
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Tilting LCD Screen
Medium sized Body
No Image Stabilization
Read the details
Large Four Thirds (17.3 x 13 mm) sensor
Image Stabilization
Live-view
Face-Detection Focusing
Optional External Viewfinder
Medium sized Body
Read the details
Sony A7S for Sports Photography
Olympus E-P3 for Sports Photography
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Environmental Sealings
Fast Max shutter speed: 1/8000s
25 Focus Points
Good Low Light ISO
Wireless Connection
Average Continuous Shooting: 5.0fps
No Image Stabilization
Read the details
Image Stabilization
Fast Max shutter speed: 1/4000s
35 Focus Points
Optional External Viewfinder
Average Ergonomics&Handling
Slow Continuous Shooting: 3.0fps
Environmental Sealings
Read the details
Sony A7S for Daily Photography
Olympus E-P3 for Daily Photography
Large Full frame (35.8 x 23.9 mm) sensor
Environmental Sealings
Medium size Body
489g
Body Thickness 48mm
Read the details
Sony A7S for Landscape Photography
Olympus E-P3 for Landscape Photography
Large Full frame (35.8 x 23.9 mm) sensor
Environmental Sealings
Live-view
Average Resolution Sensor: 12.0MP
Read the details
Large Four Thirds (17.3 x 13 mm) sensor
Live-view
Average Resolution Sensor: 12.0MP
No Environmental Sealings
Read the details
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 A7S and Olympus E-P3, below you can find their scores in five different aspects.
Our Decision Algorithm dynamically scores cameras using 63 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 A7S and Olympus E-P3 scores compare:
Sony A7S
Ranked
#38 out of 85 in SLR-style mirrorless cameras
Ranked
#70 out of 1218 in all Cameras
Olympus E-P3
Ranked
#53 out of 126 in Rangefinder-style mirrorless cameras
Ranked
#281 out of 1218 in all Cameras
Sony A7S is the overall winner of this comparison. It has a higher Overall Score and beats Olympus E-P3 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 A7S.
| General |
Sony Alpha A7S |
Olympus PEN E-P3 |
| Brand |
Sony |
Olympus |
| Announced |
2014-04-06 |
2011-08-17 |
| Body Type |
SLR-style mirrorless |
Rangefinder-style mirrorless |
Sensor |
|
|
| Type |
CMOS |
CMOS |
| Size |
Full frame |
Four Thirds |
| Dimensions |
35.8 x 23.9 mm |
17.3 x 13 mm |
| Area |
855.62mm2 |
224.90mm2 |
| Megapixels |
12 megapixels |
12 megapixels |
| Max Resolution |
4240 x 2832 |
4032 x 3024 |
| Max Native Light sensitivity |
409,600 ISO |
12,800 ISO |
| Min Native Light sensitivity |
100 ISO |
100 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 |
25 |
35 |
Lens |
|
|
| Manual Focus |
|
|
| Lens Mount |
Sony E |
Micro Four Thirds |
| Number of Available Lenses |
122 |
107 |
Screen |
|
|
| Type |
Tilting |
Fixed type |
| Size |
3 |
3" |
| Resolution |
1,230k dots |
614k dots |
| Touch Screen |
|
|
Viewfinder |
|
|
| Viewfinder |
Electronic |
Electronic (optional) |
| Viewfinder Resolution |
2,359k dots |
no electronic viewfinder |
| Viewfinder Coverage |
100% |
n/a |
| Viewfinder Magnification |
0.71x |
n/a |
Photography Features |
|
|
| Max Mechanical Shutter |
1/8000s |
1/4000s |
| Shutter Priority |
|
|
| Aperture Priority |
|
|
| Manual Exposure Mode |
|
|
| Custom White Balance |
|
|
| Image Stabilization |
No |
Sensor-shift |
| Built-in Flash |
|
|
| Flash Range |
no built-in flash |
10.00 m (@ ISO 200) |
| Max Flash Sync |
no built-in flash |
1/180s |
| External Flash |
|
|
| Continuous Shooting |
5.0 fps |
3.0 fps |
| Multi-Segment |
|
|
| Average |
|
|
| Spot |
|
|
| Partial |
|
|
| AF-Area |
|
|
| Center Weighted |
|
|
| AE Bracketing |
|
|
| WB Bracketing |
|
|
Video Features |
|
|
| Max Video Resolution |
3840 x 2160 |
1920 x 1080 |
| Video Formats |
MPEG-4, AVCHD, XAVC |
AVCHD, Motion JPEG |
| Microphone Port |
|
|
| Headphone Port |
|
|
Connectivity |
|
|
| Wireless Connectivity |
Built-In |
None |
| HDMI |
|
|
Physical |
|
|
| Environmental Sealing |
|
|
| Weight |
489g |
369g |
| Dimensions |
127 x 94 x 48mm |
122 x 69 x 34mm |
| Battery Life |
360 shots |
330 shots |
Other Features |
|
|
| Timelapse Recording |
With Downloadable App |
|
| GPS |
None |
None |
DxO Sensor Scores |
|
|
| DxO Overall Score |
87 |
51 |
| DxO Color Depth |
23.9 |
20.8 |
| DxO Dynamic Range |
13.2 |
10.1 |
| DxO Low Light ISO |
3702 |
536 |
|
Report a correction |
Report a correction |