Sony a6400 vs Sony a7R IIIA Specifications Comparison
| Camera Feature | Sony a6400 | Sony a7R IIIA |
|---|---|---|
| Announced | January 2019 | April 2021 |
| Camera Type | Mirrorless | Mirrorless |
| Sensor Type | CMOS | BSI CMOS |
| Image Processor | BIONZ X | BIONZ X |
| Resolution | 24.2 MP | 42.4 MP |
| Pixel Dimensions | 6000×4000 | 7952×5304 |
| Sensor Dimensions | 23.5 x 15.6 mm (APS-C) | 35.9 x 24.0 mm (Full Frame) |
| Sensor Pixel Size | 3.92µ | 4.51µ |
| Low Pass Filter | Yes | No |
| IBIS (In-Body Image Stabilization) | No | Yes |
| Base ISO | ISO 100 | ISO 100 |
| Max Native ISO | ISO 32,000 | ISO 32,000 |
| Extended ISOs | ISO 100-102,400 | ISO 50-102,400 |
| High-Resolution Sensor Shift | No | Yes |
| Focus Stack Bracketing | No | No |
| Pre-Shoot Burst Mode | No | No |
| Fastest Shutter Speed | 1/4000 | 1/8000 |
| Longest Shutter Speed | 30 seconds | 30 seconds |
| Continuous Shooting (Mechanical Shutter) | 11 FPS | 10 FPS |
| Continuous Shooting (Electronic Shutter) | 8 FPS | 10 FPS |
| Notes for High FPS Shooting | None | Compressed 12-bit raw at 10 FPS (uncompressed 14-bit raw is available at 6 FPS) |
| Buffer Size (Raw) | 46 frames (11 FPS) | 76 frames (10 FPS) |
| Autofocus System | Hybrid PDAF | Hybrid PDAF |
| Autofocus Points | 425 | 399 |
| Maximum Low-Light AF Sensitivity (Standardized to f/2, ISO 100) | -2 EV | -3 EV |
| Standard Flash Sync Speed | 1/160 | 1/250 |
| Curtain to Protect Sensor at Shutdown | No | No |
Video Features | ||
| Maximum Video Bit Depth (Internal) | 8 bits | 8 bits |
| Maximum Video Bit Depth (External) | 8 bits | 8 bits |
| Raw Video | No | No |
| 4K Maximum Framerate | 30 FPS | 30 FPS |
| 1080P Maximum Framerate | 120 FPS | 120 FPS |
| Additional Video Crop Factor | Extra 1.23x crop in 4K 30p; extra 1.14x crop at 1080p 100 / 120 FPS | No |
| Chroma Subsampling | 4:2:0, 4:2:2 (External) | 4:2:0, 4:2:2 (External) |
| Video Recording Limit | 780 min | 30 min |
Physical and Other Features | ||
| Card Slots | 1 | 2 |
| Slot 1 Type | SD (UHS-I) | SD (UHS-II) |
| Slot 2 Type | N/A | SD (UHS-I) |
| Rear LCD Size (Diagonal) | 3.0 in | 3.0 in |
| Rear LCD Resolution | 0.92 million dots | 2.36 million dots |
| Articulating LCD | Single Axis | Single Axis |
| Touchscreen | Yes | Yes |
| Viewfinder | EVF | EVF |
| Viewfinder Magnification | 1.07x (0.70x FF equiv.) | 0.78x |
| Viewfinder Resolution | 2.36 million dots | 3.69 million dots |
| Viewfinder Coverage | 100% | 100% |
| Voice Memo | No | No |
| Headphone Jack | No | Yes |
| Microphone Jack | Yes | Yes |
| Built-in Flash | Yes | No |
| GPS | No | No |
| Bluetooth | Yes | Yes |
| WiFi | Yes | Yes |
| USB Type | Type B 2.0 | Type C 3.2 Gen 1 |
| Battery Type | NP-FW50 | NP-FZ100 |
| Battery Life (Viewfinder) | 360 frames | 530 frames |
| Battery Life (Rear LCD) | 410 frames | 640 frames |
| Weather Sealed | Yes | Yes |
| Weight (Body Only w/ Battery + Card) | 403 g (0.89 lbs.) | 657 g (1.45 lbs.) |
| Dimensions (LxHxD) | 120 x 67 x 50 mm (4.7 x 2.6 x 2.0″)1 | 127 x 96 x 74 mm (5.0 x 3.8 x 2.9″) |
Price Comparison | ||
| MSRP, Body Only | $900 (Check Current Price) | $2200 (Check Current Price) |
| Used Prices (Affiliate) | Sony a6400 Used Prices | Sony a7R IIIA Used Prices |
| 1The Sony a6400’s depth measurement in this table excludes the optional rubber cap for the viewfinder | ||
Questions? Go to our forum, where you can start a conversation and talk to photographers about these two cameras!
Photography Life is part of the B&H and KEH affiliate programs. When you make a purchase through the affiliate links in this article, we can be compensated with a percentage of each sale. If you found this comparison useful, buying anything through these links allows you to support Photography Life at no extra cost to you. Thank you for supporting our efforts!
