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Sony Alpha A7S III
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The Sony Alpha a7S III is a full-frame camera designed specifically for video excellence, highlighted by its 12.1 MP sensor that prioritizes exceptional low-light performance and wide dynamic range over photographic resolution. Its ability to record internally in 4K at 120fps in 10-bit 4:2:2, together with a very high resolution electronic viewfinder (9.44M dots) and an extremely reliable phase detection autofocus system, make it a robust work tool for professional videographers. Its design includes a fully articulated screen, dual slots for CFexpress Type A cards and a heat dissipation system that allows extended recordings without interruptions, establishing it as the standard for light film productions and high-end content creation.
- 5-axis Sensor-shift Image Stabilization
- 4K at 120fps and FHD at 240fps Video
- Built-in Wireless
- Weather-sealed Body
- 9440k dot Electronic viewfinder
- 12MP - Full frame BSI-CMOS Sensor
Specifications
Year 2020
Sensor 12.1 MP · Full Frame
Mount Sony E
IBIS Yes
Weight 699 g
Launch Price USD 3,498
Current Price USD 3,198 (Feb/2026)
Battery 600 shots
- Brand
- Sony
- Line or model
- Alpha A7S III
- Effective megapixels
- 12.1 Effective megapixels: usable sensor resolution for images.
- Sensor type
- CMOS Sensor technology (for example, CMOS, CCD).
- Processor
- BIONZ XR
- ISO range
- ISO 80 - 102400 (expands to 50 - 409600) Range of ISO values available on the camera.
- Body type
- SLR-style mirrorless
- Body classification
- Dslr
- Body dimensions
- 699g / 129 x 97 x 81mm Physical body dimensions (width × height × depth), usually in mm.
- Weather sealing
- Weather sealing against dust and moisture.
- Viewfinder
- 9440k dot Electronic viewfinder Viewfinder type (optical or electronic) for composition.
- Screen size
- 3.00" Physical size of the screen; measured by the visible diagonal in inches.
- Screen resolution
- 1,229k dots Number of pixels shown on the screen (width × height).
- Touch screen
- Indicates whether the screen supports touch for menus or focus.
- Screen articulation
- Fully articulated screen Screen articulation type (tilting, fully‑articulated, etc.).
- Video modes
- 4K at 120fps and FHD at 240fps Video Recording Available combinations of resolution and frames per second (FPS) for video recording.
- 4K max FPS
- 120 Maximum frames per second at 4K.
- FHD max FPS
- 240 Maximum frames per second in Full HD.
- Wireless connectivity
- Built-in wireless (Wi-Fi) connectivity ( 802.11b/g/n with NFC) Wireless features available (Bluetooth/Wi‑Fi).
- Mount
- Sony E Lens mount type supported by the camera. If L-Mount Alliance appears, it means the camera uses Leica L mount shared across alliance brands.
- Launch price
- USD 3,498 In 2020, it is the manufacturer’s suggested price at release.
- Current price
- USD 3,198 It is the approximate market value (used or new) as of Feb/2026.
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