In depth comparison and review of Olympus OM-D E-M1 Mark III and Sony Alpha7s III ILCE-7SM3. Compare design, sensors, proximity features, memory capacities and other important specifications and features to easily choose the right camera for you. Our goal is to help you uncover differences between the products and find the digital camera that will best fit your needs.
| DESIGN AND DIMENSIONS | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Product Type | Digital camera - 4K - mirrorless system | Digital camera - 4K - mirrorless system |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 9.09 cm | 9.69 cm |
| Width | 13.41 cm | 12.89 cm |
| Depth | 6.89 cm | 8.08 cm |
| Weight | 504 g | 699 g |
| Weight Details | Camera only: 504 g Camera with battery and memory card: 580 g |
Camera with battery and memory card: 699 g |
| Body Material | Magnesium alloy | Magnesium alloy |
| Enclosure Colour | Black | - |
| Protection | Splashproof, freezeproof, dust-resistant | Dust-resistant, moisture-resistant |
| Digital Zoom | - | 4x |
| SENSOR | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Sensor Resolution | 20.4 Megapixel | 12.1 Megapixel |
|---|---|---|
| Optical Sensor Type | Live MOS | Exmor R CMOS |
| Total Pixels | 21,800,000 pixels | 12,900,000 pixels |
| Effective Sensor Resolution | 20,400,000 pixels | 12,100,000 pixels |
| Optical Sensor Size | Four Thirds (4/3") | Full Frame (35.6 x 23.8 mm) |
| Frame Rate (Max Resolution) | 24 fps | 120 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Supersonic Wave Filter (SWF) | Dust Reduction (image sensor vibration), Anti-Dust coating |
| Image Stabiliser | Optical (5-axis image sensor shift mechanism) | Optical (5-axis Steady Shot) |
| Built-in Optical Image Stabiliser | Yes | Yes |
| Sensors | Digital level metre | Digital level metre |
| PROCESSOR | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Image Processor | TruePic IX | BIONZ XR |
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| LENS | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Lens Mounting Type | Micro Four Thirds | Sony E-mount |
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| FOCUSING | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Auto Focus | TTL contrast and phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 121 | 759 |
| Auto Focus Features | Focus Peaking function | Focus Peaking function, Predictive Focus Control |
| AE/AF Control | Face-priority AF, Eye detection AF | Flex Focus Point, Face-priority AF, Subject-tracking AF, Eye detection AF |
| Face Detection | Eye Detect AF, face-priority AF function | Face Recognition, face-priority AF function |
| VIEWFINDER | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Viewfinder Type | Electronic - LCD | Built-in - electronic |
|---|---|---|
| Viewfinder Colour Support | Colour | Colour |
| Viewfinder Diagonal Size | - | 0.64" |
| Viewfinder Resolution | 2,360,000 pixels | 9,437,184 pixels |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 1.48x | 0.9x |
| Optical Viewfinder Dioptric Correction Range | -4 to +2 | -4 to +3 |
| Viewfinder Information | Shutter speed, exposure compensation, AF-in-focus, aperture, white balance, Exposure Mode, image stabilizer, battery status, AF lock, electronic level, area AF frame, metering mode | - |
| Field of View Crop Factor | 2 | - |
| Features | Viewfinder brightness control, colour temperature control | - |
| EXPOSURE & WHITE BALANCE | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| ISO (Max) | 25600 | 409600 |
|---|---|---|
| Native ISO | 200-6400 | - |
| Extended ISO (Max) | 25600 | 409600 |
| Extended ISO (Min) | 64 | 40 |
| Light Sensitivity | ISO auto (64-6400), ISO 64-25600 | ISO 204800, ISO 409600, ISO 80-102400, ISO 40 |
| Exposure Metering | Multi-segment, centre-weighted, spot, highlight spot, shadow spot | Multi-segment, centre-weighted, spot |
| Exposure Metering Zones | 324 | 1200 |
| Exposure Modes | Bulb, automatic, manual, aperture-priority, shutter-priority | Bulb, automatic, manual, aperture-priority, shutter-priority |
| Bracketing Modes | Art Filter bracketing, focus bracketing, ISO sensitivity bracketing, Flash Exposure Bracketing, white balance bracketing | Dynamic Range Bracketing |
| Special Effects | Sepia, Monotone, Black & White Red filter, Black & White Yellow filter, Vivid, Black & White Orange filter, soft focus, natural, Black & White Green filter, Flat, portrait, Water Colour, Diorama, Cross Process, partial colour, Grainy Film, Light Tone, Pop Art, Pale & Light Colour, pin hole, Gentle Sepia, Dramatic Tone, Bleach Bypass, High Key, Low Key, Key Line, Vintage, e-Portrait | - |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Fluorescent, sunlight, tungsten light, Flash, shade, overcast, Underwater, 2000K - 14000K | Incandescent, fluorescent, cloudy, Flash, daylight, shade, Underwater, 2500K - 9900K |
| Shutter Type | Mechanical, electronic | Mechanical electronically-controlled |
| Max Shutter Speed | 1/32000 sec | 1/8000 sec |
| Min Shutter Speed | 60 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1, 1/2 or 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | 5 steps in 1/3, 2/3 or 1 EV steps | 3, 5 or 9 steps |
| White Balance Bracketing | Yes | - |
| X-sync Speed | 1/250sec | 1/250sec |
| Exposure Range | EV -2-20 (ISO 100) | EV -3-20 (ISO 100) |
| DISPLAY | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Type | 3" LCD display | 3" LCD display |
|---|---|---|
| Touch Screen | Yes | Yes |
| Display Format | 1,037,000 pixels | 1,440,000 pixels |
| Display Form Factor | Rotating | Folding |
| Display Features | Display brightness control, display colour control | Display brightness control |
| VIDEOGRAPHY / CAMCORDER | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Digital Video Format | MJPEG, H.264 | H.264, XAVC S, H.265, XAVC HS |
|---|---|---|
| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, RAW, RAW + JPEG |
| Max Video Resolution | 4096 x 2160 | 3840 x 2160 |
| Audio Signal Format | Linear PCM | AAC |
| Microphone Operation Mode | Stereo | Stereo |
| Microphone Features | Wind noise reduction | - |
| MEMORY | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
|---|
| Memory Card Slot | Dual SD card | Dual SD card, dual CFexpress |
|---|---|---|
| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card, CFexpress |
| Memory Card Included | No | No |
| Image Storage | 5184 x 3888 | JPEG 4240 x 2832 JPEG 2768 x 1848 JPEG 2128 x 1416 JPEG 1376 x 920 JPEG 3776 x 2832 JPEG 2464 x 1848 JPEG 1888 x 1416 JPEG 1232 x 920 JPEG 4240 x 2348 JPEG 2768 x 1550 JPEG 2128 x 1200 JPEG 1376 x 776 JPEG 2832 x 2832 JPEG 1840 x 1840 JPEG 1408 x 1408 JPEG 912 x 912 |
| Video Capture | 4096 x 2160 p - 24 fps - 237Mbps 3840 x 2160 p - 30 fps 3840 x 2160 p - 25 fps 3840 x 2160 p - 24 fps 1920 x 1080 p - 30 fps 1920 x 1080 p - 25 fps 1920 x 1080 p - 24 fps 1920 x 1080 p - 60 fps 1920 x 1080 p - 50 fps 1280 x 720 p - 60 fps 1280 x 720 p - 50 fps 1280 x 720 p - 30 fps 1280 x 720 p - 25 fps 1280 x 720 p - 24 fps AVI - 640 x 480 p - 30 fps |
XAVC HS - 3840 x 2160 p - 120 fps XAVC HS - 3840 x 2160 p - 60 fps XAVC HS - 3840 x 2160 p - 100 fps - 200Mbps XAVC HS - 3840 x 2160 p - 50 fps XAVC HS - 3840 x 2160 p - 24 fps XAVC S - 3840 x 2160 p - 120 fps XAVC S - 3840 x 2160 p - 60 fps XAVC S - 3840 x 2160 p - 30 fps XAVC S - 3840 x 2160 p - 24 fps XAVC S - 3840 x 2160 p - 100 fps XAVC S - 3840 x 2160 p - 50 fps XAVC S - 3840 x 2160 p - 25 fps XAVC S HD - 1920 x 1080 p - 120 fps XAVC S HD - 1920 x 1080 p - 60 fps XAVC S HD - 1920 x 1080 p - 30 fps XAVC S HD - 1920 x 1080 p - 24 fps XAVC S HD - 1920 x 1080 p - 100 fps XAVC S HD - 1920 x 1080 p - 50 fps XAVC S HD - 1920 x 1080 p - 25 fps |
| BATTERY AND CHARGING | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Battery Type | Olympus BLH-1 Lithium Ion | Sony NP-FZ100 Lithium Ion |
|---|---|---|
| Details | Olympus BLH-1 Li-ion rechargeable battery - 1720 mAh (included) | Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) |
| Battery Life | Photo shooting - 420 shots Video recording - 85 minutes |
Photo shooting - 510 shots (EVF on) Photo shooting - 600 shots (LCD Monitor on) Video recording - 80 minutes (EVF on) Video recording - 135 minutes (LCD Monitor on) |
| CONNECTIONS | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
|---|
| Interface | HDMI, USB 3.0, IEEE 802.11a/b/g/n/ac, Bluetooth 4.2 | HDMI, USB-C, Wireless LAN, NFC (Near Field Communication), Bluetooth 5.0 |
|---|---|---|
| Connectivity Features | Remote control via mobile devices, remote live view | Remote control via mobile devices, Wireless Image Transfer, PC Remote functions via Wi-Fi |
| Print Standard | DPOF support, Exif Print support | Exif Print support, PRINT Image Matching |
| Flash Terminal | Hot shoe, PC terminal | Hot shoe |
| Connector Type | USB 3.0 (USB Type-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) |
USB (USB Type-C) HDMI output (19 pin HDMI Type A) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) |
| FEATURES | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
|---|
| Self-Timer Delay | 2sec, 12sec | 10 sec, 2sec, 5 sec |
|---|---|---|
| Continuous Shooting Speed | 10 frames per second, 15 frames per second, 60 frames per second, 18 frames per second | 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second |
| Additional Features | Built-in speaker, RGB primary colour filter, auto power save, sharpness control, histogram display, in-camera red-eye removal, cropping an image, resizing an image, saturation control, shadow point display, highlight point display, in-camera film editing, contrast control, digital tele-converter, USB charging, HDR image enhancement technology, high-speed recording, Time-Lapse recording, silent shooting, GPS via mobile, Flicker detection, multiple exposure capture, Focus Stacking, 80-megapixel High Resolution mode | Built-in speaker, digital image rotation, camera orientation detection, histogram display, shadow point display, interval shooting mode, highlight point display, Dynamic Range Optimizer, USB charging, built-in help guide, Chromatic Aberration Compensation (CAC), HDR image enhancement technology, Intelligent AUTO (iAUTO), fast motion recording, Lens Distortion Compensation (LDC), noise reduction over long exposures, high ISO speed noise reduction, silent shooting, BRAVIA Sync function, PhotoTV HD, GPS via mobile, slow motion recording, peripheral shading correction, anti-flicker, Hybrid Log-Gamma (HLG) recording |
| OTHERS | Olympus OM-D E-M1 Mark III | Sony Alpha7s III ILCE-7SM3 |
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| Included Accessories | Battery charger, body cap, shoulder strap, USB cable, cable clip | - |
|---|---|---|
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | -10 °C | 0 °C |
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