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Olympus E-M1 vs Sony A900

Portability
71
Imaging
53
Features
85
Overall
65
Olympus OM-D E-M1 front
 
Sony Alpha DSLR-A900 front
Portability
54
Imaging
66
Features
62
Overall
64

Olympus E-M1 vs Sony A900 Key Specs

Olympus E-M1
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 100 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 497g - 130 x 94 x 63mm
  • Announced October 2013
  • Successor is Olympus E-M1 II
Sony A900
(Full Review)
  • 25MP - Full frame Sensor
  • 3" Fixed Screen
  • ISO 100 - 6400
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • No Video
  • Sony/Minolta Alpha Mount
  • 895g - 156 x 117 x 82mm
  • Introduced October 2008
  • Updated by Sony A99
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Olympus E-M1 vs Sony A900 Overview

Below is a thorough comparison of the Olympus E-M1 versus Sony A900, former being a Pro Mirrorless while the latter is a Advanced DSLR by competitors Olympus and Sony. There is a substantial difference among the image resolutions of the E-M1 (16MP) and A900 (25MP) and the E-M1 (Four Thirds) and A900 (Full frame) come with totally different sensor sizes.

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The E-M1 was released 5 years later than the A900 and that is a fairly big difference as far as camera tech is concerned. Both of these cameras come with different body type with the Olympus E-M1 being a SLR-style mirrorless camera and the Sony A900 being a Mid-size SLR camera.

Before going in to a step-by-step comparison, below is a brief summation of how the E-M1 grades vs the A900 in relation to portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-M1 over the Sony A900

 E-M1 A900 
IntroducedOctober 2013October 2008More recent by 62 months
Screen typeTiltingFixed Tilting screen
Screen resolution1037k922kSharper screen (+115k dot)
Touch friendly screen Quickly navigate

Reasons to pick Sony A900 over the Olympus E-M1

 A900 E-M1 

Common features in the Olympus E-M1 and Sony A900

 E-M1 A900 
Focus manually More accurate focusing
Screen dimension3"3"Identical screen dimensions
Selfie screen No selfie screen

Olympus E-M1 vs Sony A900 Physical Comparison

If you are going to lug around your camera regularly, you'll need to factor its weight and measurements. The Olympus E-M1 enjoys physical measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") and a weight of 497 grams (1.10 lbs) and the Sony A900 has proportions of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") accompanied by a weight of 895 grams (1.97 lbs).

See the Olympus E-M1 versus Sony A900 in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will differ based on the lens you have during that time. The following is the front view sizing comparison of the E-M1 compared to the A900.

Olympus E-M1 vs Sony A900 size comparison

Considering size and weight, the portability score of the E-M1 and A900 is 71 and 54 respectively.

Olympus E-M1 vs Sony A900 top view buttons comparison

Olympus E-M1 vs Sony A900 Sensor Comparison

Usually, its hard to see the contrast in sensor measurements merely by viewing a spec sheet. The photograph underneath may provide you a better sense of the sensor measurements in the E-M1 and A900.

As you can see, both of those cameras have got different megapixel count and different sensor measurements. The E-M1 because of its smaller sensor will make achieving bokeh harder and the Sony A900 will result in greater detail as a result of its extra 9MP. Higher resolution can also let you crop shots much more aggressively. The more recent E-M1 is going to have an advantage when it comes to sensor tech.

Olympus E-M1 vs Sony A900 sensor size comparison

Olympus E-M1 vs Sony A900 Screen and ViewFinder

Olympus E-M1 vs Sony A900 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Olympus E-M1
Portrait photography with Sony A900
71
has manual focus
high flash sync (1/320s)
MP count decent (16 megapixels)
sensor size is good (Four Thirds)
offers face detect focus
supports RAW formats
71
has manual focus
high resolution (25 megapixels)
large sensor size (Full frame)
exports RAW files
no liveview feature
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Street Comparison

Olympus E-M1 as a Street photography camera
Sony A900 as a Street photography camera
78
screen tilts up and down
built in image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
supports RAW formats
offers touch to focus
environment proofing
lighter than competition in class (497 grams)
great ISO range (25,600)
66
has image stabilization (Sensor based)
large sensor size (Full frame)
exports RAW files
environment sealing
screen is fixed
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Sports Comparison

Olympus E-M1 Sports photography info
Sony A900 Sports photography info
70
maximum shutter speed is high (1/8,000s)
built in image stabilization (Sensor based 5-axis)
MP count decent (16MP)
sensor size is good (Four Thirds)
offers tracking focus
environment proofing
sensor has phase detect auto focus
low battery pack (350 shots)
70
max shutter speed is good (1/8,000 seconds)
has image stabilization (Sensor based)
high resolution (25MP)
large sensor size (Full frame)
environment sealing
comes with phase detect autofocus
no liveview feature
slow fps (5.0 fps)
Photography Glossary

Travel Comparison

Olympus E-M1 Travel photography features
Sony A900 Travel photography features
65
lighter than competition in class (497 grams)
environment proofing
offers touch to focus
MP count decent (16MP)
low battery pack (350 per charge)
does not have a selfie friendly screen
54
environment sealing
high resolution (25 megapixels)
lack of Timelapse recording
display isn't selfie friendly
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Landscape Comparison

Olympus E-M1 Landscape photography details
Sony A900 Landscape photography details
73
has manual focus
change lenses (Micro Four Thirds mount)
pretty good screen size (3")
built in image stabilization (Sensor based 5-axis)
MP count decent (16 megapixels)
sensor size is good (Four Thirds)
great ISO range (25,600)
supports RAW formats
environment proofing
low battery pack (350 per charge)
72
has manual focus
switch lenses (Sony/Minolta Alpha mount)
screen is a good size (3")
has image stabilization (Sensor based)
high resolution (25MP)
large sensor size (Full frame)
exports RAW files
environment sealing
2 card slots
no liveview feature
lack of Timelapse recording
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Vlogging Comparison

Olympus E-M1 as a Vlogging camera
Sony A900 as a Vlogging camera
36
touch screen
built in image stabilization (Sensor based 5-axis)
offers face detect focus
high quality video (1920 x 1080 pxls)
includes mic support
lighter than competition in class (497g)
does not have a selfie friendly screen
9
no video
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Olympus E-M1 vs Sony A900 Specifications

Detailed spec comparison table for Olympus E-M1 and Sony A900
 Olympus OM-D E-M1Sony Alpha DSLR-A900
General Information
Make Olympus Sony
Model Olympus OM-D E-M1 Sony Alpha DSLR-A900
Type Pro Mirrorless Advanced DSLR
Announced 2013-10-28 2008-10-22
Physical type SLR-style mirrorless Mid-size SLR
Sensor Information
Processor Chip TruePIC VII Bionz
Sensor type CMOS CMOS
Sensor size Four Thirds Full frame
Sensor measurements 17.3 x 13mm 35.9 x 24mm
Sensor surface area 224.9mm² 861.6mm²
Sensor resolution 16 megapixels 25 megapixels
Anti aliasing filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Maximum resolution 4608 x 3456 6048 x 4032
Maximum native ISO 25600 6400
Minimum native ISO 100 100
RAW photos
Autofocusing
Focus manually
Autofocus touch
Autofocus continuous
Autofocus single
Autofocus tracking
Selective autofocus
Autofocus center weighted
Multi area autofocus
Autofocus live view
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Number of focus points 81 9
Lens
Lens mount Micro Four Thirds Sony/Minolta Alpha
Total lenses 107 143
Focal length multiplier 2.1 1
Screen
Display type Tilting Fixed Type
Display diagonal 3" 3"
Resolution of display 1,037k dots 922k dots
Selfie friendly
Liveview
Touch operation
Display tech - TFT Xtra Fine color LCD
Viewfinder Information
Viewfinder Electronic Optical (pentaprism)
Viewfinder resolution 2,360k dots -
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.74x 0.74x
Features
Lowest shutter speed 60 secs 30 secs
Highest shutter speed 1/8000 secs 1/8000 secs
Continuous shooting rate 10.0 frames/s 5.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Inbuilt flash
Flash range no built-in flash no built-in flash
Flash modes Flash Auto, Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync (1st curtain), Slow sync (2nd curtain), Manual Auto, On, Off, Red-Eye, Slow Sync, Rear Curtain, Fill-in, Wireless
Hot shoe
AEB
WB bracketing
Highest flash synchronize 1/320 secs 1/250 secs
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1920 x 1080 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps) -
Maximum video resolution 1920x1080 None
Video data format H.264, Motion JPEG -
Microphone support
Headphone support
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 497 gr (1.10 pounds) 895 gr (1.97 pounds)
Dimensions 130 x 94 x 63mm (5.1" x 3.7" x 2.5") 156 x 117 x 82mm (6.1" x 4.6" x 3.2")
DXO scores
DXO All around score 73 79
DXO Color Depth score 23.0 23.7
DXO Dynamic range score 12.7 12.3
DXO Low light score 757 1431
Other
Battery life 350 pictures 880 pictures
Type of battery Battery Pack Battery Pack
Battery model BLN-1 NP-FM500H
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec)
Time lapse feature
Type of storage SD/SDHC/SDXC Compact Flash (Type I or II), Memory Stick Duo / Pro Duo, UDMA Mode 5, Supports FAT12 / FAT16 / FAT32
Card slots One 2
Cost at launch $799 $2,736