Head to head · specs cited · drawn to scale
Sony A7R III vs Sony A7R IV
Every spec below is quoted from the makers' official pages — where a figure isn't published we say so rather than guess. Sizes are drawn at true relative scale from published dimensions, and the bag-fit row is computed against our measured bag catalog.
The 3 biggest published differences
- EVF resolution: the A7R IV leads at 5,760,000 dots (1.3 cm (0.5 type) electronic viewfinder, UXGA OLED) vs the A7R III's 3,686,400 dots.
- Resolution (MP): the A7R IV leads at 61.0 vs the A7R III's 42.4.
- Weight (body): the A7R III leads at 657 g vs the A7R IV's 665 g.
 A7R III Sony E |  A7R IV Sony E | |
|---|---|---|
| Overview | ||
| Type | Mirrorless | Mirrorless |
| Format | Full-frame | 35 mm full frame (35.7×23.8mm) |
| Lens mount | Sony E | Sony E |
| Released | —, not published | —, not published |
| Sensor & Image | ||
| Sensor type | 35mm full frame (35.9x24.0mm), Exmor R CMOS sensor | Exmor R CMOS sensor |
| Sensor size | Full-frame | 35 mm full frame (35.7×23.8mm) |
| Resolution (MP) | 42.4 | 61.0 |
| In-body stabilisation | 5.5 | 5.5 stops (based on CIPA standard. Pitch/yaw shake only. With Planar T* FE 50mm F1.4 ZA lens mounted. Long exposure NR off.); Image Sensor-Shift mechanism with 5-axis compensation |
| ISO range | 100 | Still images: ISO 100-32000 (ISO numbers up from ISO 50 to ISO 102400 can be set as expanded ISO range) |
| Autofocus & Speed | ||
| AF system | Fast Hybrid AF (phase-detection AF/contrast-detection AF) | Fast Hybrid AF (phase-detection AF/contrast-detection AF); 35 mm full frame: 567 points (phase-detection) / 425 points (contrast-detection) |
| Subject detection | 35mm full frame: 399 points (phase-detection AF) / 425 points (contrast-detection AF); Eye AF (Human/Animal) | Lock-on AF [Still] Human (Right/Left Eye Select)/Animal, [Movie] Human (Right/Left Eye Select); Face Detection (max. 8 faces) |
| Burst — mechanical | 10 | Continuous shooting: Hi+: max. 10 fps, Hi: max. 8 fps, Mid: max. 6 fps, Lo: max. 3 fps |
| Burst — electronic | —, not published | —, not published |
| Video | ||
| Max video | 4K (3840 x 2160) up to 30p | XAVC S 4K: 3840 x 2160 (30p, 100 M), 3840 x 2160 (24p, 100 M) |
| Codecs / sampling | XAVC S, AVCHD | XAVC S: MPEG-4 AVC/H.264, AVCHD: MPEG-4 AVC/H.264 |
| Recording limit | —, not published | —, not published |
| Viewfinder & Screen | ||
| EVF resolution | 3,686,400 dots | 5,760,000 dots (1.3 cm (0.5 type) electronic viewfinder, UXGA OLED) |
| EVF magnification | approx. 0.78x (with 50mm lens at infinity, -1m-1) | Approx. 0.78 x (with 50 mm lens at infinity, -1m) |
| Rear screen | 7.5cm (3.0-type) type TFT, 1,440,000 dots | 2.95 inch (3.0-type) wide type TFT, 1,440,000 dots, tilt up by approx. 107 degrees / down by approx. 41 degrees, Touch Panel: Yes |
| Body & Handling | ||
| Dimensions (W×H×D) | 126.9 × 95.6 × 73.7 mm | 128.9 × 96.4 × 77.5 mm |
| Weight (body) | 657 g | 665 g |
| Weather sealing | Sealing is provided throughout the body to minimise entry of dust and moisture (not guaranteed 100% dust and moisture proof) | —, not published |
| Shutter durability | —, not published | —, not published |
| Power & Storage | ||
| Battery life (CIPA) | Approx. 530 shots (Viewfinder) / approx. 650 shots (LCD monitor) | Approx. 530 shots (Viewfinder) / approx. 670 shots (LCD monitor) (CIPA standard) |
| Battery | NP-FZ100 | NP-FZ100 |
| Card slots | 2 (SLOT1: SD UHS-I/II compliant; SLOT2: Multi slot for Memory Stick Duo/SD UHS-I compliant) | Dual: SLOT1 SD (UHS-I/II compliant), SLOT2 SD (UHS-I/II compliant) |
| Connectivity | ||
| USB | USB Type-C (SuperSpeed USB 3.1 Gen 1 compatible), Multi/Micro USB Terminal | Multi/Micro USB Terminal and USB Type-C Terminal (USB Power supply available on both) |
| Wireless | Wi-Fi IEEE 802.11b/g/n (2.4GHz band), Bluetooth Standard Ver. 4.1 (2.4GHz band) | Wi-Fi IEEE 802.11a/b/g/n/ac (2.4 GHz / 5 GHz band); Bluetooth Standard Ver. 4.1 (2.4 GHz band); NFC (Type 3 Tag) |
| HDMI | HDMI micro connector (Type-D) | HDMI micro connector (Type-D) |
| Price | ||
| Launch price | —, not published | —, not published |
| Size, to scale | ||
Front view, drawn at the same scale from each maker's published W×H (mm). | ||
| Smallest bag that fits | ||
| Body + standard zoom | Think Tank Mirrorless Mover 25 V2 Fits with 24-105 f/4 · View at B&H Photo Video | Think Tank Mirrorless Mover 25 V2 Fits with 24-105 f/4 · View at B&H Photo Video |
Sources
“Number Of Pixels (Effective): Approx. 42.4 megapixels. Focus Point: 35mm full frame: 399 points (phase-detection AF)... / 425 points (contrast-detection AF). Continuous Drive Speed (approx. max.): Continuous shooting: Hi+: max. 10 fps. Compensation Effect: 5.5 stops (based on CIPA standard. Pitch/yaw shake only. With Planar T* FE 50mm F1.4 ZA lens mounted. Long exposure NR off.)”
“Sensor Type 35 mm full frame (35.7×23.8mm), Exmor R CMOS sensor ... Number Of Pixels (Effective) Approx. 61.0 megapixels ... Focus Point 35 mm full frame: 567 points (phase-detection AF) ... Compensation Effect 5.5 stops (based on CIPA standard...) ... Continuous shooting: Hi+: max. 10 fps ... Number of Dots 5,760,000 dots ... Supplied Battery One rechargeable battery pack NP-FZ100”
Spec values are the manufacturers' published figures, compared factually — we don't rank cameras. Fit verdicts are planning estimates from published interior dimensions, not guarantees. See methodology.
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