Olympus E-M10 III vs Sony A99
80 Imaging
54 Features
75 Overall
62
57 Imaging
69 Features
88 Overall
76
Olympus E-M10 III vs Sony A99 Key Specs
(Full Review)
- 16MP - Four Thirds Sensor
- 3" Tilting Screen
- ISO 200 - 25600
- Sensor based 5-axis Image Stabilization
- 3840 x 2160 video
- Micro Four Thirds Mount
- 410g - 122 x 84 x 50mm
- Released August 2017
- Older Model is Olympus E-M10 II
- Newer Model is Olympus E-M10 IV
(Full Review)
- 24MP - Full frame Sensor
- 3" Fully Articulated Screen
- ISO 100 - 25600
- Sensor based Image Stabilization
- 1/8000s Maximum Shutter
- 1920 x 1080 video
- Sony/Minolta Alpha Mount
- 812g - 147 x 111 x 78mm
- Revealed December 2012
- Previous Model is Sony A900
- Successor is Sony A99 II
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Here, we will be comparing the Olympus E-M10 III and Sony A99, former is a Entry-Level Mirrorless while the latter is a Advanced DSLR by companies Olympus and Sony. There is a sizable difference among the image resolutions of the E-M10 III (16MP) and A99 (24MP) and the E-M10 III (Four Thirds) and A99 (Full frame) posses different sensor size.
Apple Innovates by Creating Next-Level Optical Stabilization for iPhoneThe E-M10 III was introduced 4 years after the A99 which is a fairly significant difference as far as camera tech is concerned. Each of these cameras feature different body design with the Olympus E-M10 III being a SLR-style mirrorless camera and the Sony A99 being a Mid-size SLR camera.
Before diving straight to a thorough comparison, here is a short summation of how the E-M10 III grades versus the A99 with regards to portability, imaging, features and an overall mark.
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Here is a preview of the gallery images for Olympus OM-D E-M10 Mark III & Sony SLT-A99. The whole galleries are viewable at Olympus E-M10 III Gallery & Sony A99 Gallery.
Reasons to pick Olympus E-M10 III over the Sony A99
| E-M10 III | A99 | |||
|---|---|---|---|---|
| Revealed | August 2017 | December 2012 | Newer by 58 months | |
| Touch screen | Quickly navigate |
Reasons to pick Sony A99 over the Olympus E-M10 III
| A99 | E-M10 III | |||
|---|---|---|---|---|
| Screen type | Fully Articulated | Tilting | Fully Articulating screen | |
| Screen resolution | 1229k | 1040k | Sharper screen (+189k dot) | |
| Selfie screen | Take selfies |
Common features in the Olympus E-M10 III and Sony A99
| E-M10 III | A99 | |||
|---|---|---|---|---|
| Manually focus | Very exact focus | |||
| Screen size | 3" | 3" | Same screen size |
Olympus E-M10 III vs Sony A99 Physical Comparison
For anybody who is planning to travel with your camera regularly, you will have to consider its weight and volume. The Olympus E-M10 III provides outer measurements of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") along with a weight of 410 grams (0.90 lbs) and the Sony A99 has sizing of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") and a weight of 812 grams (1.79 lbs).
Examine the Olympus E-M10 III and Sony A99 in our brand new Camera & Lens Size Comparison Tool.
Always remember, the weight of an ILC will differ dependant on the lens you have chosen during that time. Following is a front view physical size comparison of the E-M10 III and the A99.

Considering size and weight, the portability score of the E-M10 III and A99 is 80 and 57 respectively.
Olympus E-M10 III vs Sony A99 Sensor Comparison
Generally, it is hard to picture the contrast in sensor dimensions simply by viewing specifications. The image below should give you a more clear sense of the sensor measurements in the E-M10 III and A99.
Plainly, both of those cameras feature different megapixel count and different sensor dimensions. The E-M10 III using its smaller sensor is going to make achieving shallow depth of field tougher and the Sony A99 will render greater detail using its extra 8 Megapixels. Higher resolution will also help you crop photographs way more aggressively. The fresher E-M10 III should have a benefit in sensor tech.
Olympus E-M10 III vs Sony A99 Screen and ViewFinder
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Olympus E-M10 III vs Sony A99 Specifications
| Olympus OM-D E-M10 Mark III | Sony SLT-A99 | |
|---|---|---|
| General Information | ||
| Brand | Olympus | Sony |
| Model type | Olympus OM-D E-M10 Mark III | Sony SLT-A99 |
| Class | Entry-Level Mirrorless | Advanced DSLR |
| Released | 2017-08-31 | 2012-12-12 |
| Physical type | SLR-style mirrorless | Mid-size SLR |
| Sensor Information | ||
| Chip | TruePic VIII | Bionz |
| Sensor type | CMOS | CMOS |
| Sensor size | Four Thirds | Full frame |
| Sensor dimensions | 17.4 x 13mm | 35.8 x 23.8mm |
| Sensor surface area | 226.2mm² | 852.0mm² |
| Sensor resolution | 16 megapixels | 24 megapixels |
| Anti alias filter | ||
| Aspect ratio | 4:3 | 3:2 and 16:9 |
| Highest resolution | 4608 x 3456 | 6000 x 4000 |
| Highest native ISO | 25600 | 25600 |
| Min native ISO | 200 | 100 |
| RAW images | ||
| Min boosted ISO | 100 | - |
| Autofocusing | ||
| Focus manually | ||
| Touch focus | ||
| Continuous AF | ||
| AF single | ||
| Tracking AF | ||
| AF selectice | ||
| AF center weighted | ||
| AF multi area | ||
| Live view AF | ||
| Face detection focusing | ||
| Contract detection focusing | ||
| Phase detection focusing | ||
| Total focus points | 121 | 19 |
| Cross type focus points | - | 11 |
| Lens | ||
| Lens support | Micro Four Thirds | Sony/Minolta Alpha |
| Amount of lenses | 107 | 143 |
| Crop factor | 2.1 | 1 |
| Screen | ||
| Type of screen | Tilting | Fully Articulated |
| Screen size | 3 inch | 3 inch |
| Resolution of screen | 1,040k dots | 1,229k dots |
| Selfie friendly | ||
| Liveview | ||
| Touch capability | ||
| Screen technology | - | TFT Xtra Fine color LCD |
| Viewfinder Information | ||
| Viewfinder | Electronic | Electronic |
| Viewfinder resolution | 2,360k dots | 2,359k dots |
| Viewfinder coverage | 100 percent | 100 percent |
| Viewfinder magnification | 0.62x | 0.71x |
| Features | ||
| Slowest shutter speed | 60 seconds | 30 seconds |
| Maximum shutter speed | 1/4000 seconds | 1/8000 seconds |
| Maximum silent shutter speed | 1/16000 seconds | - |
| Continuous shooting rate | 8.6 frames/s | 10.0 frames/s |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Change WB | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash distance | 5.80 m (at ISO 100) | no built-in flash |
| Flash settings | Auto, redeye, slow sync, 2nd-curtain slow sync, redeye slow sync, fill-in, manual, off | Auto, On, Off, Red-Eye, Slow Sync, High Speed Sync, Rear Curtain, Fill-in, Wireless |
| Hot shoe | ||
| Auto exposure bracketing | ||
| White balance bracketing | ||
| Maximum flash synchronize | 1/250 seconds | 1/250 seconds |
| Exposure | ||
| Multisegment metering | ||
| Average metering | ||
| Spot metering | ||
| Partial metering | ||
| AF area metering | ||
| Center weighted metering | ||
| Video features | ||
| Video resolutions | 3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM | 1920 x 1080 (60, 24 fps), 1440 x 1080 (30fps), 640 x 424 (29.97 fps) |
| Highest video resolution | 3840x2160 | 1920x1080 |
| Video file format | MPEG-4, H.264 | MPEG-4, AVCHD, H.264 |
| Mic 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 | BuiltIn |
| Physical | ||
| Environment sealing | ||
| Water proofing | ||
| Dust proofing | ||
| Shock proofing | ||
| Crush proofing | ||
| Freeze proofing | ||
| Weight | 410 grams (0.90 pounds) | 812 grams (1.79 pounds) |
| Physical dimensions | 122 x 84 x 50mm (4.8" x 3.3" x 2.0") | 147 x 111 x 78mm (5.8" x 4.4" x 3.1") |
| DXO scores | ||
| DXO All around rating | not tested | 89 |
| DXO Color Depth rating | not tested | 25.0 |
| DXO Dynamic range rating | not tested | 14.0 |
| DXO Low light rating | not tested | 1555 |
| Other | ||
| Battery life | 330 shots | 500 shots |
| Battery style | Battery Pack | Battery Pack |
| Battery ID | BLS-50 | NP-FM500H |
| Self timer | Yes (2 or 12 secs, custom) | Yes (2 or 10 sec) |
| Time lapse feature | ||
| Type of storage | SD/SDHC/SDXC (UHS-I/II supported) | Memory Stick PRO Duo/Pro-HG Duo; SD, SDHC and SDXC |
| Card slots | Single | 2 |
| Cost at launch | $650 | $1,998 |