Sony a7R II vs Sony a9 Specifications Comparison
| Camera Feature | Sony a7R II | Sony a9 |
|---|---|---|
| Announced | June 2015 | April 2017 |
| Camera Type | Mirrorless | Mirrorless |
| Sensor Type | BSI CMOS | Stacked CMOS |
| Image Processor | BIONZ X | BIONZ X |
| Resolution | 42.4 MP | 24.2 MP |
| Pixel Dimensions | 7952×5304 | 6000×4000 |
| Sensor Dimensions | 35.9 x 24.0 mm (Full Frame) | 35.6 x 23.8 mm (Full Frame) |
| Sensor Pixel Size | 4.51µ | 5.93µ |
| Low Pass Filter | No | Yes |
| IBIS (In-Body Image Stabilization) | Yes | Yes |
| Base ISO | ISO 100 | ISO 100 |
| Max Native ISO | ISO 25,600 | ISO 51,200 |
| Extended ISOs | ISO 50-102,400 | ISO 50-204,800 |
| High-Resolution Sensor Shift | No | No |
| Focus Stack Bracketing | No | No |
| Pre-Shoot Burst Mode | No | No |
| Fastest Shutter Speed | 1/8000 | 1/32000 |
| Longest Shutter Speed | 30 seconds | 30 seconds |
| Continuous Shooting (Mechanical Shutter) | 5 FPS | 5 FPS |
| Continuous Shooting (Electronic Shutter) | 5 FPS | 20 FPS |
| Notes for High FPS Shooting | 12-bit raw in continuous drive modes (14-bit in single-shot mode) | Compressed 12-bit raw at 20 FPS (uncompressed 12-bit raw is available at 12 FPS) |
| Buffer Size (Raw) | 23 frames (5 FPS) | 241 frames (20 FPS) |
| Autofocus System | Hybrid PDAF | Hybrid PDAF |
| Autofocus Points | 399 | 693 |
| Maximum Low-Light AF Sensitivity (Standardized to f/2, ISO 100) | -2 EV | -3 EV |
| Standard Flash Sync Speed | 1/250 | 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 | 60 FPS | 120 FPS |
| Additional Video Crop Factor | No | 1.2x crop at 4K 30p (4K 24/25p has no additional crop) |
| Chroma Subsampling | 4:2:0, 4:2:2 (External) | 4:2:0, 4:2:2 (External) |
| Video Recording Limit | 30 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 | 1.23 million dots | 1.44 million dots |
| Articulating LCD | Single Axis | Single Axis |
| Touchscreen | No | Yes |
| Viewfinder | EVF | EVF |
| Viewfinder Magnification | 0.78x | 0.78x |
| Viewfinder Resolution | 2.36 million dots | 3.69 million dots |
| Viewfinder Coverage | 100% | 100% |
| Voice Memo | No | No |
| Headphone Jack | Yes | Yes |
| Microphone Jack | Yes | Yes |
| Built-in Flash | No | No |
| GPS | No | No |
| Bluetooth | No | Yes |
| WiFi | Yes | Yes |
| USB Type | Type B 2.0 | Type B 2.0 |
| Battery Type | NP-FW50 | NP-FZ100 |
| Battery Life (Viewfinder) | 290 frames | 480 frames |
| Battery Life (Rear LCD) | 340 frames | 650 frames |
| Weather Sealed | Yes | Yes |
| Weight (Body Only w/ Battery + Card) | 625 g (1.38 lbs.) | 588 g (1.30 lbs.) |
| Dimensions (LxHxD) | 127 x 96 x 70 mm (5.0 x 3.8 x 2.8″)1 | 127 x 96 x 73 mm (5.0 x 3.8 x 2.9″)2 |
Price Comparison | ||
| MSRP, Body Only | $1800 (Discontinued) | $4500 (Discontinued) |
| Used Prices (Affiliate) | Sony a7R II Used Prices | Sony a9 Used Prices |
| 1The Sony a7R II’s official dimensions do not include the depth of the protruding viewfinder. To match typical standards today, 10mm were added to the a7R II’s depth measurement in this table. | ||
| 2The Sony a9’s official dimensions do not include the depth of the protruding viewfinder. To match typical standards today, 10mm were added to the a9’s depth measurement in this table. | ||
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