The Sony a1 II Mirrorless Camera offers the best overall mixture of speed, video capabilities, high-resolution stills, and a robust, professional-worthy body design. It pulls much of the original a1's well-rounded feature-set into an a9 III body and adds the AF and IBIS technologies introduced with the a7R V. It's a camera meant for working professionals, whether they are sports, editorial, product, fashion, or advertising shooters, and it's equally appealing to landscape, portrait, wedding, and event photographers, too. And, beyond photography, it has the video tools the a1-series is known for, including 8K recording, along with useful stabilization and framing aids borrowed from the ZV class of cameras.
Key Features
50MP Full-Frame Stacked BSI CMOS Sensor
AI Tracking & Human Pose Estimation
8K 30p and 4K 120p Video in 10-Bit
Up to 30 fps Shooting with AF/AE
Pre-Capture & Speed Boost Button
8.5-Stop IBIS + Dynamic Stabilization
9.44m-Dot EVF with 240 fps Refresh Rate
3.2" 2.1m-Dot 4-Axis Touchscreen LCD
Specifications
Imaging
Lens Mount
Sony E
Sensor Resolution
Actual: 50.5 Megapixel
Effective: 50.1 Megapixel (8640 x 5760)
Image Sensor
35.9 x 24 mm (Full-Frame) Stacked CMOS
Sensor Crop (35mm Equivalent)
Crop Factor: 1x
Additional Modes: 1.5x Additional Crop Occurs in Select Video Modes
Image Stabilization
Sensor-Shift, 5-Axis
Built-In ND Filter
No
Capture Type
Stills & Video
Exposure Control
Shutter Type
Mechanical Focal Plane Shutter and Electronic Rolling Shutter
Shutter Speed
Electronic Shutter
1/32000 to 30 Seconds
1/8000 to 1/4 Second in Movie Mode Mechanical Shutter
1/8000 to 30 Seconds
Bulb/Time Mode
Bulb Mode
ISO/Gain Sensitivity
Photo
Native in Manual Mode: 100 to 32,000 (50 to 102,400 Extended)
Native in Auto Mode: 100 to 12,800 Video
Native in Manual Mode: 100 to 32,000
Native in Auto Mode: 100 to 12,800
Up to 30 fps at Maximum Resolution for up to 240 Frames (Raw) / 400 Frames (JPEG)
Interval Recording
Yes
Self-Timer
2/5/10-Second Delay
Still Image Capture
Aspect Ratio
1:1, 3:2, 4:3, 16:9
Image File Format
HEIF, JPEG, Raw
Bit Depth
14-Bit
Video Capture
Internal Recording Modes
H.264/XAVC S 4:2:2 10-Bit
UHD 4K (3840 x 2160) at 23.98/25/29.97/50/59.94/110/120 fps [100 to 280 Mb/s]
1920 x 1080 at 23.98/25/29.97/50/59.94 fps [50 Mb/s] H.264/XAVC S 4:2:0 8-Bit
UHD 4K (3840 x 2160) at 23.98/25/29.97/50/59.94/100/120 fps [60 to 200 Mb/s]
1920 x 1080 at 23.98/25/29.97/50/59.94/100/120 fps [16 to 100 Mb/s] H.264 ALL-Intra/XAVC S-I 4:2:2 10-Bit
UHD 4K (3840 x 2160) at 23.98/25/29.97/50/59.94 fps [240 to 600 Mb/s]
1920 x 1080 at 23.98/25/29.97/50/59.94 fps [89 to 222 Mb/s] H.265/XAVC HS 4:2:2 10-Bit
UHD 8K (7680 x 4320) at 23.98/25/29.97 fps [260 to 520 Mb/s]
UHD 4K (3840 x 2160) at 23.98/50/59.94/100/120 fps [50 to 280 Mb/s] H.265/XAVC HS 4:2:0 10-Bit
UHD 8K (7680 x 4320) at 23.98/25/29.97 fps [200 to 400 Mb/s]
UHD 4K (3840 x 2160) at 23.98/50/59.94/100/120 fps [30 to 200 Mb/s]
External Recording Modes
4:2:0 8-Bit via HDMI
UHD 8K (7680 x 4320) at 23.98/25/29.97 fps
UHD 4K (3840 x 2160) at 23.98/29.97/59.94 fps
1920 x 1080p at 23.98/29.97/50/59.94 fps
1920 x 1080i at 50/59.94 fps 4:2:2 10-Bit via HDMI
UHD 4K (3840 x 2160) at 23.98/25/29.97/50/59.94 fps
1920 x 1080p at 23.98/29.97/50/59.94 fps
1920 x 1080i at 50/59.94 fps Raw 16-Bit via HDMI
4332 x 2446 at 23.98/29.97/59.94 fps
Fast-/Slow-Motion Support
Yes
Gamma Curve
S Cinetone, Sony S-Log 3
Recording Limit
No
IP Streaming
No
Built-In Microphone
Stereo
Audio Recording
2-Channel 16-Bit 48 kHz LPCM Audio
Interface
Media/Memory Card Slot
Dual Slot: CFexpress Type A / SD (UHS-II)
Video I/O
1x HDMI Output
Audio I/O
1x 1/8" / 3.5 mm TRS Stereo Headphone Output
1x 1/8" / 3.5 mm TRS Stereo Microphone Input
Power I/O
1x USB-C Input
Other I/O
1x PC Flash Sync Output
1x RJ45 Data Output
1x Sony Multi/Micro-USB Remote/Time Code Input
1x USB-C (USB 3.2 / 3.1 Gen 2) Data/Remote Input/Output (Shared with Power Input)
for 1 item(s) 
