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Olympus E-M1 vs Sony A100

Portability
71
Imaging
53
Features
85
Overall
65
Olympus OM-D E-M1 front
 
Sony Alpha DSLR-A100 front
Portability
64
Imaging
48
Features
38
Overall
44

Olympus E-M1 vs Sony A100 Key Specs

Olympus E-M1
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Screen
  • ISO 100 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 497g - 130 x 94 x 63mm
  • Introduced October 2013
  • Later Model is Olympus E-M1 II
Sony A100
(Full Review)
  • 10MP - APS-C Sensor
  • 2.5" Fixed Screen
  • ISO 100 - 1600
  • Sensor based Image Stabilization
  • No Video
  • Sony/Minolta Alpha Mount
  • 638g - 133 x 95 x 71mm
  • Introduced July 2006
  • Replaced the Konica Minolta 5D
  • Refreshed by Sony A550
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Olympus E-M1 vs Sony A100 Overview

The following is a comprehensive overview of the Olympus E-M1 versus Sony A100, former is a Pro Mirrorless while the latter is a Entry-Level DSLR by manufacturers Olympus and Sony. There exists a considerable gap among the sensor resolutions of the E-M1 (16MP) and A100 (10MP) and the E-M1 (Four Thirds) and A100 (APS-C) enjoy different sensor sizes.

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The E-M1 was unveiled 7 years after the A100 which is a fairly large difference as far as camera technology is concerned. Both of these cameras offer different body type with the Olympus E-M1 being a SLR-style mirrorless camera and the Sony A100 being a Compact SLR camera.

Before going in to a step-by-step comparison, below is a short summation of how the E-M1 grades vs the A100 with respect to portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M1 over the Sony A100

 E-M1 A100 
IntroducedOctober 2013July 2006Newer by 89 months
Screen typeTiltingFixed Tilting screen
Screen sizing3"2.5"Bigger screen (+0.5")
Screen resolution1037k230kClearer screen (+807k dot)
Touch screen Quickly navigate

Reasons to pick Sony A100 over the Olympus E-M1

 A100 E-M1 

Common features in the Olympus E-M1 and Sony A100

 E-M1 A100 
Focus manually Dial accurate focus
Selfie screen No selfie screen

Olympus E-M1 vs Sony A100 Physical Comparison

For anyone who is going to travel with your camera, you'll need to factor in its weight and proportions. The Olympus E-M1 enjoys external measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") accompanied by a weight of 497 grams (1.10 lbs) while the Sony A100 has measurements of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") accompanied by a weight of 638 grams (1.41 lbs).

Look at the Olympus E-M1 versus Sony A100 in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an ILC will differ based on the lens you are utilising at that time. Following is the front view dimension comparison of the E-M1 compared to the A100.

Olympus E-M1 vs Sony A100 size comparison

Taking into consideration dimensions and weight, the portability grade of the E-M1 and A100 is 71 and 64 respectively.

Olympus E-M1 vs Sony A100 top view buttons comparison

Olympus E-M1 vs Sony A100 Sensor Comparison

Quite often, its hard to visualize the gap in sensor dimensions only by looking through specifications. The image underneath will give you a far better sense of the sensor sizing in the E-M1 and A100.

To sum up, the two cameras offer different resolutions and different sensor dimensions. The E-M1 with its smaller sensor is going to make shooting shallower depth of field harder and the Olympus E-M1 will result in extra detail having an extra 6MP. Higher resolution will also let you crop photographs a little more aggressively. The fresher E-M1 provides an advantage when it comes to sensor technology.

Olympus E-M1 vs Sony A100 sensor size comparison

Olympus E-M1 vs Sony A100 Screen and ViewFinder

Olympus E-M1 vs Sony A100 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M1 Portrait photography highlights
Sony A100 Portrait photography highlights
71
you can focus manually
flash sync speed is above average (1/320 seconds)
MP count decent (16MP)
sensor size is good (Four Thirds)
comes with face detect focusing
supports RAW files
52
has manual focus
sensor size is decent (APS-C)
saves RAW formats
doesn't have liveview
low MP (10 megapixels)
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Street Comparison

Olympus E-M1 Street photography factors
Sony A100 Street photography factors
78
tilting screen
has image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
supports RAW files
provides focus by touch
environment proofing
lighter than competition in class (497 grams)
very good ISO range (25,600)
64
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW formats
fixed screen
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Sports Comparison

Olympus E-M1 Sports photography factors
Sony A100 Sports photography factors
70
max shutter speed is good (1/8,000s)
has image stabilization (Sensor based 5-axis)
MP count decent (16 megapixels)
sensor size is good (Four Thirds)
comes with tracking focus
environment proofing
comes with phase detect AF
not so great battery pack (350 CIPA)
49
has image stabilization (Sensor based)
sensor size is decent (APS-C)
sensor has phase detect AF
doesn't have liveview
continuous shooting slow (3.0 fps)
low MP (10MP)
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Travel Comparison

Olympus E-M1 Travel photography advice
Sony A100 Travel photography advice
65
lighter than competition in class (497 grams)
environment proofing
provides focus by touch
MP count decent (16MP)
not so great battery pack (350 per charge)
screen isn't selfie friendly
45
flash built-in
does not have Timelapse recording
low MP (10 megapixels)
screen is not selfie friendly
Photography Glossary

Landscape Comparison

Olympus E-M1 Landscape photography advice
Sony A100 Landscape photography advice
73
you can focus manually
change lenses (Micro Four Thirds mount)
screen size is decent (3 inches)
has image stabilization (Sensor based 5-axis)
MP count decent (16 megapixels)
sensor size is good (Four Thirds)
very good ISO range (25,600)
supports RAW files
environment proofing
not so great battery pack (350 per charge)
53
has manual focus
swap lenses (Sony/Minolta Alpha mount)
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW formats
tiny screen (2.5 inch)
doesn't have liveview
low MP (10MP)
does not have Timelapse recording
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Vlogging Comparison

Olympus E-M1 Vlogging details
Sony A100 Vlogging details
36
built-in touchscreen
has image stabilization (Sensor based 5-axis)
comes with face detect focusing
great video quality (1920 x 1080 resolution)
does have microphone port
lighter than competition in class (497g)
screen isn't selfie friendly
9
can't shoot video
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Olympus E-M1 vs Sony A100 Specifications

Detailed spec comparison table for Olympus E-M1 and Sony A100
 Olympus OM-D E-M1Sony Alpha DSLR-A100
General Information
Manufacturer Olympus Sony
Model type Olympus OM-D E-M1 Sony Alpha DSLR-A100
Type Pro Mirrorless Entry-Level DSLR
Introduced 2013-10-28 2006-07-31
Physical type SLR-style mirrorless Compact SLR
Sensor Information
Powered by TruePIC VII -
Sensor type CMOS CCD
Sensor size Four Thirds APS-C
Sensor measurements 17.3 x 13mm 23.6 x 15.8mm
Sensor surface area 224.9mm² 372.9mm²
Sensor resolution 16 megapixel 10 megapixel
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Maximum resolution 4608 x 3456 3872 x 2592
Maximum native ISO 25600 1600
Minimum native ISO 100 100
RAW photos
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Autofocus single
Autofocus tracking
Selective autofocus
Center weighted autofocus
Autofocus multi area
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 81 9
Lens
Lens support Micro Four Thirds Sony/Minolta Alpha
Number of lenses 107 143
Focal length multiplier 2.1 1.5
Screen
Type of screen Tilting Fixed Type
Screen size 3 inch 2.5 inch
Screen resolution 1,037 thousand dots 230 thousand dots
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder Electronic Optical (pentamirror)
Viewfinder resolution 2,360 thousand dots -
Viewfinder coverage 100% 95%
Viewfinder magnification 0.74x 0.55x
Features
Slowest shutter speed 60 seconds 30 seconds
Maximum shutter speed 1/8000 seconds 1/4000 seconds
Continuous shooting rate 10.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Set white balance
Image stabilization
Integrated flash
Flash distance no built-in flash -
Flash settings Flash Auto, Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync (1st curtain), Slow sync (2nd curtain), Manual Auto, Fill-in, Red-Eye reduction, Slow Sync, Off
Hot shoe
AEB
WB bracketing
Maximum flash synchronize 1/320 seconds 1/160 seconds
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps) -
Maximum video resolution 1920x1080 None
Video format H.264, Motion JPEG -
Microphone port
Headphone port
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 proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 497 grams (1.10 lb) 638 grams (1.41 lb)
Dimensions 130 x 94 x 63mm (5.1" x 3.7" x 2.5") 133 x 95 x 71mm (5.2" x 3.7" x 2.8")
DXO scores
DXO All around rating 73 61
DXO Color Depth rating 23.0 22.0
DXO Dynamic range rating 12.7 11.2
DXO Low light rating 757 476
Other
Battery life 350 pictures -
Form of battery Battery Pack -
Battery ID BLN-1 NP-FM55H
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec)
Time lapse feature
Storage type SD/SDHC/SDXC Compact Flash (Type I or II)
Card slots Single Single
Cost at launch $799 $1,000