Sony a7S II vs Sony a1 Specifications Comparison
| Camera Feature | Sony a7S II | Sony a1 |
|---|---|---|
| Announced | September 2015 | January 2021 |
| Camera Type | Mirrorless | Mirrorless |
| Sensor Type | CMOS | Stacked CMOS |
| Image Processor | BIONZ X | BIONZ XR |
| Resolution | 12.2 MP | 50.1 MP |
| Pixel Dimensions | 4240×2832 | 8640×5760 |
| Sensor Dimensions | 35.6 x 23.8 mm (Full Frame) | 35.9 x 24.0 mm (Full Frame) |
| Sensor Pixel Size | 8.4µ | 4.16µ |
| Low Pass Filter | Yes | No |
| IBIS (In-Body Image Stabilization) | Yes | Yes |
| Base ISO | ISO 100 | ISO 100 |
| Max Native ISO | ISO 102,400 | ISO 32,000 |
| Extended ISOs | ISO 50-409,600 | ISO 50-102,400 |
| High-Resolution Sensor Shift | No | Yes |
| Focus Stack Bracketing | No | No |
| Pre-Shoot Burst Mode | No | No |
| Fastest Shutter Speed | 1/8000 | 1/32000 |
| Longest Shutter Speed | 30 seconds | 30 seconds |
| Continuous Shooting (Mechanical Shutter) | 5 FPS | 10 FPS |
| Continuous Shooting (Electronic Shutter) | 5 FPS | 30 FPS |
| Notes for High FPS Shooting | Autofocus fixed at first frame for 5 FPS shooting; 12-bit raw only | Compressed raw at 30 FPS (uncompressed and lossless compressed raw at 20 FPS) |
| Buffer Size (Raw) | 31 frames (5 FPS) | 155 frames (30 FPS), 238 frames (20 FPS) |
| Autofocus System | Contrast Detect | Hybrid PDAF |
| Autofocus Points | 169 | 759 |
| Maximum Low-Light AF Sensitivity (Standardized to f/2, ISO 100) | -4 EV | -4 EV |
| Standard Flash Sync Speed | 1/250 | 1/400 |
| Curtain to Protect Sensor at Shutdown | No | Yes |
Video Features | ||
| Maximum Video Bit Depth (Internal) | 8 bits | 10 bits |
| Maximum Video Bit Depth (External) | 8 bits | 12 bits |
| Raw Video | No | Yes, externally |
| 8K Maximum Framerate | N/A | 30 FPS |
| 4K Maximum Framerate | 30 FPS | 120 FPS |
| 1080P Maximum Framerate | 120 FPS | 240 FPS |
| Additional Video Crop Factor | No | No |
| Chroma Subsampling | 4:2:0, 4:2:2 (External) | 4:2:2 |
| Video Recording Limit | 30 min | 780 min |
Physical and Other Features | ||
| Card Slots | 1 | 2 |
| Slot 1 Type | SD (UHS-I) | CFExpress Type A, or SD (UHS-II) |
| Slot 2 Type | N/A | CFExpress Type A, or SD (UHS-II) |
| 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 | 0.90x |
| Viewfinder Resolution | 2.36 million dots | 9.44 million dots |
| Viewfinder Coverage | 100% | 100% |
| Voice Memo | No | Yes |
| 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 C 3.2 Gen 1 |
| Battery Type | NP-FW50 | NP-FZ100 |
| Battery Life (Viewfinder) | 310 frames | 430 frames |
| Battery Life (Rear LCD) | 370 frames | 530 frames |
| Weather Sealed | Yes | Yes |
| Weight (Body Only w/ Battery + Card) | 627 g (1.38 lbs.) | 737 g (1.62 lbs.) |
| Dimensions (LxHxD) | 127 x 96 x 70 mm (5.0 x 3.8 x 2.8″)1 | 129 x 97 x 81 mm (5.1 x 3.9 x 3.3″) |
Price Comparison | ||
| MSRP, Body Only | $3000 (Discontinued) | $6500 (Check Current Price) |
| Used Prices (Affiliate) | Sony a7S II Used Prices | Sony a1 Used Prices |
| 1The Sony a7S II’s official dimensions do not include the depth of the protruding viewfinder. To match typical standards today, 10mm were added to the a7S II’s depth measurement in this table. | ||
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