The long awaited Sony a7S III brings high frame-rate 4K video with incredible low-light sensitivity to the A7 full frame mirrorless lineup. The video-centric follow up to the a7S II adds internal 10-bit 4:2:2 4K capture at up to 120fps while building on the a7S II's already segment leading low-light capabilities. Upgrades also extend to the 9.44M dot OLED viewfinder, 759-point phase detection autofocus and reduced rolling shutter.
SONY A7SIII
Built around a new 12.1MP Exmor RS BSI CMOS sensor coupled with a BIONZ XR image processor, the a7S III is a powerful video oriented mirrorless full-frame camera. The long awaited follow up to the a7 SII, which set the standard for low-light capabilities in the full-frame mirrorless segment, brings not only improvements to that key spec but also a host of other notable upgrades.
Key Camera Specifications
12.1MP Exmor RS BSI CMOS sensor
ISO sensitivity of 40-409600
4K Video Capture at up to 120fps
Internal recording at up to 10-bit 4:2:2 color sampling
No recording time limit
16-bit raw video output over HDMI-A
759-Point phase-detection autofocus with 92% coverage
Dual UHS-II card slots
S-Log2/3 or HLG/BT.2020 gamma curves
5.5 Stop IBIS
The new sensor features 759 phase-detection and 425 contrast-detection autofocus points that cover approximately 92% of the image area and promises sensitivity down to -6 EV. Customizable seven-step AF transition speed and five-step AF subject shift sensitivity allows for fine tuning of the autofocus system. As expected, ISO sensitivity is expanded to ISO 40-409600.
Video can be recorded in either All-I XAVC S-I at up to 600Mbps or XAVC HS which uses H.265 compression for smaller file sizes. Internal 4K recording uses 1:1 pixel readout at up to 120fps with 10-bit 4:2:2 sampling. The a7S III offers extensive color customization including the S-Log2 and S-Log3 gamma curves that can deliver 15+ stops of dynamic range. HLG and BT.2020 color spaces are also available. Recording time limits have been removed and improved heat dissipation has been added to the camera body's design. Internal recording is to UHS-II rated dual card slots that support CFexpress Type A or SD cards. External recording of 16-bit raw video is possible via the full size HDMI port when used with compatible recorders.
m NA-A7SIII
m is the leader in producing ively designed precision manufactured aluminum underwater housings for the Sony a7 camera line and continues to innovate with the new NA-A7SIII housing.
Optional
HDMI 2.0
25086 M24 adaptor for HDMI 2.0 Cable
25094 M24A3R210-M28A1R170 HDMI 2.0 Cable (for NA-A7SIII to use with Ninja V housing)
17922 m Atomos Ninja V Housing for Atomos Ninja V 5” 4Kp60 4:2:2 10-bit Reorder/Monitor/Player
HDMI 1.4
25033 Standard HDMI Cable with M16 Thread
25081 M24-M16 Step Down Adaptor
25095 HDMI (D-A) cable in 220mm length (for connection from HDMI bulkhead to camera)
17906 NA-502H Housing for SmallHD 502 Monitor
17920 NA-502B-H Housing for SmallHD 502 Bright Monitor