In depth comparison and review of Sony Alpha7s III ILCE-7SM3 and Sony Alpha7 IV ILCE-7M4. 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 | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Product Type | Digital camera - 4K - mirrorless system | Digital camera - 4K - mirrorless system |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 9.69 cm | 9.64 cm |
| Width | 12.89 cm | 13.13 cm |
| Depth | 8.08 cm | 7.98 cm |
| Weight | 699 g | 658 g |
| Weight Details | Camera with battery and memory card: 699 g | Camera with battery and memory card: 658 g |
| Body Material | Magnesium alloy | Magnesium alloy |
| Protection | Dust-resistant, moisture-resistant | Dust-resistant, moisture-resistant |
| Digital Zoom | 4x | 4x |
| SENSOR | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Sensor Resolution | 12.1 Megapixel | 33.0 Megapixel |
|---|---|---|
| Optical Sensor Type | Exmor R CMOS | Exmor R CMOS |
| Total Pixels | 12,900,000 pixels | 34,100,000 pixels |
| Effective Sensor Resolution | 12,100,000 pixels | 33,000,000 pixels |
| Optical Sensor Size | Full Frame (35.6 x 23.8 mm) | Full Frame (35.9 x 23.9 mm) |
| Frame Rate (Max Resolution) | 120 fps | 60 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Dust Reduction (image sensor vibration), Anti-Dust coating | Dust Reduction (image sensor vibration), Anti-Dust coating |
| Image Stabiliser | Optical (5-axis Steady Shot) | Optical (Steady Shot with 5-axis Intelligent Active Mode) |
| Built-in Optical Image Stabiliser | Yes | Yes |
| Sensors | Digital level metre | Digital level metre |
| PROCESSOR | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Image Processor | BIONZ XR | BIONZ XR |
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| LENS | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Lens Mounting Type | Sony E-mount | Sony E-mount |
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| FOCUSING | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Auto Focus | TTL contrast and phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 759 | 759 |
| Auto Focus Features | Focus Peaking function, Predictive Focus Control | Focus Peaking function, Predictive Focus Control |
| AE/AF Control | Flex Focus Point, Face-priority AF, Subject-tracking AF, Eye detection AF | Face-priority AF, Subject-tracking AF, Touch Area AF, Zone AF, Real-time Eye AF, Real-time Tracking AF, Wide-area AF, Expanded area AF, animal eye detection, bird eye detection, right/left eye select |
| Face Detection | Face Recognition, face-priority AF function | Eye Detect AF, face-priority AF function |
| VIEWFINDER | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Viewfinder Type | Built-in - electronic | Electronic - OLED |
|---|---|---|
| Viewfinder Colour Support | Colour | Colour |
| Viewfinder Diagonal Size | 0.64" | 0.5" |
| Viewfinder Resolution | 9,437,184 pixels | 3,686,400 pixels |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 0.9x | 0.78x |
| Optical Viewfinder Dioptric Correction Range | -4 to +3 | -4 to +3 |
| EXPOSURE & WHITE BALANCE | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| ISO (Max) | 409600 | 204800 |
|---|---|---|
| Native ISO | - | 100-51200 |
| Extended ISO (Max) | 409600 | 204800 |
| Extended ISO (Min) | 40 | 50 |
| Light Sensitivity | ISO 204800, ISO 409600, ISO 80-102400, ISO 40 | ISO 50, ISO auto, ISO 204800, ISO 100-51200 |
| Exposure Metering | Multi-segment, centre-weighted, spot | Multi-segment, centre-weighted, average, highlight spot |
| Exposure Metering Zones | 1200 | 1200 |
| Exposure Modes | Bulb, automatic, manual, aperture-priority, shutter-priority | Automatic, manual, aperture-priority, shutter-priority |
| Bracketing Modes | Dynamic Range Bracketing | Dynamic Range Bracketing, white balance bracketing |
| Special Effects | - | Soft Skin, Creative Look presets |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Incandescent, fluorescent, cloudy, Flash, daylight, shade, Underwater, 2500K - 9900K | Incandescent, fluorescent, cloudy, Flash, daylight, shade, Underwater, 2500K - 9900K |
| Shutter Type | Mechanical electronically-controlled | Mechanical electronically-controlled |
| Max Shutter Speed | 1/8000 sec | 1/8000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/2 or 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | 3, 5 or 9 steps | 3, 5 or 9 steps |
| X-sync Speed | 1/250sec | 1/250sec |
| Exposure Range | EV -3-20 (ISO 100) | EV -3-20 (ISO 100) |
| DISPLAY | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Type | 3" LCD display | 3" LCD display |
|---|---|---|
| Touch Screen | Yes | Yes |
| Display Format | 1,440,000 pixels | 1,036,000 pixels |
| Display Form Factor | Folding | Folding |
| Display Features | Display brightness control | Display brightness control |
| VIDEOGRAPHY / CAMCORDER | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
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| Digital Video Format | H.264, XAVC S, H.265, XAVC HS | MPEG-4, H.264, XAVC S, H.265, XAVC HS |
|---|---|---|
| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, RAW, RAW + JPEG, HEIF, RAW + HEIF |
| Max Video Resolution | 3840 x 2160 | 3840 x 2160 |
| Audio Signal Format | AAC | Linear PCM, AAC |
| Microphone Operation Mode | Stereo | Stereo |
| Microphone Features | - | Wind noise reduction |
| MEMORY | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
|---|
| Memory Card Slot | Dual SD card, dual CFexpress | SD card, CFexpress / SD card |
|---|---|---|
| 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, CFexpress | 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 | - |
| Image Storage | 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 |
7008 x 4672 4608 x 3072 3504 x 2336 4608 x 3072 - APS-C mode 3504 x 2336 - APS-C mode 6224 x 4672 4096 x 3072 3120 x 2336 4096 x 3072 - APS-C mode 3120 x 2336 - APS-C mode 7008 x 3944 4608 x 2592 3504 x 1968 4608 x 2592 - APS-C mode 3504 x 1968 - APS-C mode 4672 x 4672 3072 x 3072 2336 x 2336 3072 x 3072 - APS-C mode 2336 x 2336 - APS-C mode |
| Video Capture | 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 |
XAVC HS - 3840 x 2160 p - 60 fps XAVC HS - 3840 x 2160 p - 24 fps XAVC HS - 3840 x 2160 p - 50 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 - 50 fps XAVC S - 3840 x 2160 p - 25 fps XAVC S - 1920 x 1080 p - 60 fps XAVC S - 1920 x 1080 p - 30 fps XAVC S - 1920 x 1080 p - 24 fps XAVC S - 1920 x 1080 p - 50 fps XAVC S - 1920 x 1080 p - 25 fps |
| BATTERY AND CHARGING | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
|---|
| Battery Type | Sony NP-FZ100 Lithium Ion | Sony NP-FZ100 Lithium Ion |
|---|---|---|
| Details | Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) | Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) |
| Battery Life | 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) |
Photo shooting - 520 shots (EVF on) Photo shooting - 580 shots (LCD Monitor on) Video recording - 100 minutes (EVF on) Video recording - 110 minutes (LCD Monitor on) |
| CONNECTIONS | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
|---|
| Interface | HDMI, USB-C, Wireless LAN, NFC (Near Field Communication), Bluetooth 5.0 | USB 2.0, USB-C, IEEE 802.11a/b/g/n/ac, Bluetooth 4.1 |
|---|---|---|
| Connectivity Features | Remote control via mobile devices, Wireless Image Transfer, PC Remote functions via Wi-Fi | Remote control via mobile devices, remote live view, Wireless Image Transfer, wireless video upload to FTP server, PC Remote functions via Wi-Fi |
| Print Standard | Exif Print support, PRINT Image Matching | Exif Print support, PRINT Image Matching |
| Flash Terminal | Hot shoe | Hot shoe |
| Connector Type | 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) |
USB 2.0 (5 pin Micro-USB Type B) USB 3.2 Gen 1 (USB Type-C) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) |
| FEATURES | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
|---|
| Self-Timer Delay | 10 sec, 2sec, 5 sec | 10 sec, 2sec, 5 sec |
|---|---|---|
| Continuous Shooting Speed | 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second | 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second |
| Additional Features | 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 | Built-in speaker, camera orientation detection, histogram display, shadow point display, highlight point display, Dynamic Range Optimizer, USB charging, Intelligent AUTO (iAUTO), fast motion recording, noise reduction over long exposures, high ISO speed noise reduction, silent shooting, BRAVIA Sync function, distortion correction function, S-Log2 gamma setting, slow motion recording, peripheral shading correction, chromatic aberration correction, anti-flicker, Hybrid Log-Gamma (HLG) recording, S-Log3 gamma setting, 4:2:2 10-bit internal rercording, simultaneous streaming & recording mode, focus breathing compensation, USB streaming, 14-bit RAW |
| OTHERS | Sony Alpha7s III ILCE-7SM3 | Sony Alpha7 IV ILCE-7M4 |
|---|
| Included Accessories | - | Eyepiece cover, body cap, shoulder strap, AC power adaptor, shoe cap, USB-C to USB-A cable |
|---|---|---|
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | 0 °C | 0 °C |
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