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Sony A7s II sensor review: Low-light performance redefined

By Kevin Carter - Thursday December 10 2015

Sensor Review
Introduction | Measurements: Excellent low-light score | Comparison 1: Sony A7S II versus Sony A7S versus Sony A7R II: Impressive high ISO DR | Comparison 2: Sony A7S II versus Nikon Df versus Nikon D810 | Conclusion
Sony A7s II sensor review: Low-light performance redefined

The new Sony A7S II is the upgrade to the A7S and offers ultra-high sensitivity up to ISO409600 and 5-axis stabilization in what promises to be an impressive available-light camera. In addition, the A7S II builds on its predecessor’s video credentials, adding 4K (UHD) internal and Full HD video up to 120 fps. Read on to find out how well the sensor in this new model performs.

Specifications and Features

The Sony A7S II is the not-unexpected update of the earlier video-centric 12-Mpix A7S. Like its predecessor, it adopts a full-frame 12.2MP Exmor CMOS sensor, but now boasts 5-axis stabilization and internal UHD 4K recording at 30 fps with full pixel read-out (without pixel-binning). In addition, there’s 1080p recording at up to 120 fps (for slow-motion footage) and all in XAVC S format. Picture Profile settings have been redeveloped, adding S-Gamut3.Cine/S-Log3 and S-Gamut3/S-Log3, which deliver what the company claims (“wide dynamic range and simple color correction”) and complement the camera’s 4K recording capabilities.

The BIONZ X image processor enables increased sensitivity to ISO 409,600, continuous shooting to 5 fps, Fast Intelligent AF with 169 points, and low-light sensitivity to an impressive –4 EV. The A7S II adopts the distinctive industrial design of its predecessor and features a 0.5-inch 2.36m-Dot XGA OLED Tru-Finder EVF and a 3.0-inch 1.28m-dot tilting LCD to the rear.

The new A7S II measures 5.0 x 3.78 x 2.36” / 127 x 96 x 60mm and weighs 22.12 oz / 627g, body only. It’s available now with a body-only price of $2999 (USD).

  • 12.2MPix Exmor CMOS
  • BIONZ X image processor
  • 5-axis stabilization
  • Internal 4K/30p and 1080/120p video
  • New S-Gamut3.Cine/S-Log3, S-Gamut3/S-Log3 profiles
  • 0.5-inch 2.36m-Dot XGA OLED Tru-Finder EVF
  • 3.0-inch 1.28m-dot tilting LCD
  • Expanded ISO 409,600 max sensitivity
  • 5 fps continuous shooting
  • Built-in Wi-Fi connectivity with NFC

Measurements: Excellent low-light score

Comparison 1: Sony A7S II versus Sony A7S versus Sony A7R II:  Impressive high ISO DR

Comparison 2: Sony A7S II versus Nikon Df versus Nikon D810

Conclusion