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Sony Alpha 7S Mirrorless Camera

The Sony a7S is a 12.2MP full-frame mirrorless camera — with 4K video. Check GearFocus for current availability, with buyer protection on every purchase.

Sony Alpha 7S Mirrorless Camera

Sony Alpha 7S Mirrorless Camera

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Camera OverviewSony a7S

The Sony Alpha 7S is a full-frame mirrorless camera built around a 12.2MP sensor paired with Sony's BIONZ X image processor. What sets this camera apart is its exceptional ISO range, stretching from ISO 50 all the way to ISO 409,600 — a remarkable span that makes it purpose-built for low-light shooting scenarios. It uses the Sony E lens mount, opening it up to a wide ecosystem of compatible glass.

The autofocus system combines contrast detection and hybrid phase/contrast detection, backed by 169 focus points along with Eye Detection AF and Face Detection AF for subject-aware tracking. For video, the Alpha 7S captures up to 4K at 30fps with 24fps and 30fps frame rate options, and crucially supports S-Log2 and S-Log3 color profiles at 8-bit for flexible color grading in post-production. The electronic viewfinder resolves at 2,359,296 dots at 60Hz, while the 3-inch LCD display offers 921,600 dots of resolution.

The body is constructed from magnesium alloy with dust-resistant sealing, measuring 126.9 x 94.4 x 48.2 mm and weighing 627g. Connectivity includes Wi-Fi, Micro HDMI output, and both 3.5mm headphone and microphone jacks — practical additions for video-oriented shooters. The camera runs on the NP-FW50 battery rated for approximately 380 shots.

Key FeaturesSony a7S

12.2MP Full-Frame Sensor: The lower pixel count prioritizes large photosites for exceptional light-gathering capability, making this camera purpose-built for low-light and high-ISO work.

ISO 50–409,600 Range: An extraordinary native ISO ceiling allows usable footage and stills in near-darkness conditions where most cameras fall short.

4K Video at 24/30fps: Records 4K footage at 24fps and 30fps, giving videographers both cinematic and standard frame rate options.

S-Log2 and S-Log3 Profiles: Built-in Sony log color profiles capture a wider dynamic range for flexible color grading in post-production.

Hybrid AF with Eye Detection: 169-point hybrid phase/contrast detection autofocus system includes Eye Detection AF and Face Detection AF for reliable subject tracking.

3.5mm Audio I/O Jacks: Dedicated headphone and microphone ports allow external microphone connection and real-time audio monitoring during video recording.

Camera SpecificationsSony a7S

Sony a7S full specifications
SpecDetail
Use CasesVideo / Cinematography, Night, Studio, Documentary, Event
TypeMirrorless
SensorFull Frame (35mm)
Resolution12.2MP
ProcessorBIONZ X
ISO Range50 – 409600
AF SystemContrast Detection, Hybrid (Phase + Contrast), Eye Detection AF, Face Detection AF
AF Points169
Max Photo Resolution4240x2832
Burst Rate5 fps
Max Video Resolution4K
Max Frame Rate30fps

DescriptionSony a7S

The Sony Alpha 7S pairs a full-frame 12.2MP sensor with the BIONZ X image processor and an ISO range spanning 50 to 409,600, making it a strong choice for photographers and videographers who frequently work in challenging light. The Sony E mount provides access to a broad selection of lenses, and the hybrid autofocus system covers 169 focus points with support for Eye Detection AF and Face Detection AF. On the video side, the camera records 4K at up to 30fps, with cinematic 24fps also available.

The inclusion of S-Log2 and S-Log3 color profiles gives colorists meaningful latitude in post-production, though output is 8-bit. The 3-inch, 921,600-dot LCD and 2,359,296-dot electronic viewfinder running at 60Hz give shooters flexible monitoring options. The magnesium alloy body measures 126.9 x 94.4 x 48.2 mm at 627g with dust-resistant sealing.

Connectivity covers Wi-Fi, Micro HDMI, USB, plus dedicated 3.5mm microphone and headphone jacks. The camera is powered by the NP-FW50 battery, rated for 380 shots.

ProsSony a7S

  • Extraordinary ISO range of 50–409,600 enables extreme low-light shooting
  • S-Log2 and S-Log3 color profiles support professional color grading workflows
  • 4K video at up to 30fps with 24fps cinematic option

ConsSony a7S

  • No in-body image stabilization — imageStabilization.inBodyIS is explicitly false
  • 8-bit video bit depth limits dynamic range latitude in post-production
  • Only 12.2MP still resolution may be limiting for large print or high-detail photography

Resources & DownloadsSony a7S

Manuals & Guides

Frequently Asked QuestionsSony a7S

What is the maximum ISO on the Sony Alpha 7S?+
The Alpha 7S has a native ISO range of 50 to 409,600 as listed in specifications. This wide range is particularly useful for low-light and nighttime photography or videography.
Does the Sony Alpha 7S have in-body image stabilization?+
No. The specifications explicitly confirm that inBodyIS is false and digitalIS is false. There is no optical or digital image stabilization built into the camera body.
What video capabilities does the Alpha 7S offer?+
The camera records 4K video at up to 30fps, with supported frame rates of 24fps and 30fps. Video color profiles include S-Log2 and S-Log3, and the camera records at 8-bit bit depth.
What memory cards does the Sony Alpha 7S support?+
The camera accepts SD, SDHC, SDXC, and Memory Stick PRO Duo cards. There is a single card slot supporting these four formats.
Does the Alpha 7S have weather sealing?+
The body offers dust-resistant protection according to the bodyDesign.weatherSealing specification. It is not rated as fully weather-sealed or splash-proof beyond dust resistance.
What lens mount does the Sony Alpha 7S use?+
The Alpha 7S uses the Sony E mount, as listed in the mount specifications. It also features a Sony Multi Interface Shoe hotshoe for compatible accessories.

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