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The Sony Alpha a7s is a 12 megapixel full-frame mirrorless camera designed for both stills and video. Unlike the a7 and a7R, the a7s is not constrained by the AVCHD standard, also offering the XAVC S system, with bitrates of up to 50Mbps. The 'S' in the camera's name denotes sensitivity. In movie shooting, it offers an ISO 200 - 102400, with extension to 409600. In stills it offers ISO 100 - 102,400, extendible to an ISO 50 - 409600 range.
Superb low light capability
Sony's new α7S model puts extraordinary sensitivity, low noise and spectacular 4K video quality into the hands of professional photographers and videographers. The new image sensor technology optimises the sensor’s dynamic range and gain depending on the environment. It broadens the range of tonal gradation in bright environments while minimising noise in dark environments to deliver extremely low-noise performance quality.
BIONZ™ X processor
The new BIONZ™ X image processing engine faithfully reproduces textures and details in real time, as seen by the naked eye, via extra high-speed processing capabilities. Together with front-end LSI (large scale integration) that accelerates processing in the earliest stages, it enables more natural details, more realistic images, richer tonal gradations and lower noise whether you shoot still images or movies.
Clean HDMI output for 4K movies
Non-compressed image output is now possible at 4K (QFHD; 3840 x 2160 pixels) resolution with selectable 30p and 24p frame rates. You can choose 4K or Full HD output from a menu. The 4K output capability allows recording of high-quality 4K images by a 4K-compatible recorder, as well as 4K output directly to a compatible monitor or TV.
Portable moviemaking reaches a new level of flexibility and attainability with the α7s’s unique combination of 35mm full-frame sensor, audio production features, and flexible lens interchangeability. Now, the dramatic effect of beautiful bokeh, plus the artistic choice of creating a rich cinematic ambience is yours, thanks to the full frame, P/A/S/M mode, and advanced audio capabilities. The accelerated BIONZ™ X image-processing engine enables area-specific noise reduction and detail reproduction technology to be applied to movies, resulting in ultra-fine detail and exceptionally low noise. Features like Picture Effect, full HDMI output for an external monitor, and full 1080p AVCHD Progressive format plus XAVC S, and the choice of 60p/24p recording further expand the options.
XAVC S format
The high-bit-rate XAVC S format is provided for serious videographers. Available for the first time in an α camera, it enables Full HD image recording at 50Mbps for extremely high-quality expression and minimal noise. It also employs the Long GOP (Group of Pictures) data compression method to realize efficient movie recording. Note: Sony recommends using an SDXC memory card higher than Class 10 when shooting movies in the XAVC S format.
12.2 MP 35mm full frame sensor
The α7s combines phenomenal sensitivity—ranging from ISO 50 to 409600 for still images and ISO 200 to 409600 for movies with supremely low noise, courtesy of Sony’s new 12.2-megapixel 35mm full-frame Exmor CMOS image sensor and optimized high-speed BIONZ™ X image processing engine. Professional movie functions satisfy the highest demands of serious photographers and videographers, and it’s all packed in the world’s smallest 35mm full-frame interchangeable-lens camera body.
S-Log2 gamma setting
This proprietary Sony gamma setting, featured in commercial video equipment, creates a 1,300% wider dynamic range for smooth expression of gradation with reduced whiteout and blackout. Through colour grading in post production, you can make the most of the low-noise image and super-rich detail to achieve various types of image expression.
Audio recording & monitoring
During movie recording and playback, you can monitor the sound using headphones connected to the α7s via the headphone jack, check levels with the display controls, or attach professional sound gear using the industry-standard XLR terminal adaptor kit.
You can fine-tune the look of movies before shooting by adjusting gradation (black level, gamma and black gamma), colour adjustment (colour mode, intensity, colour tone and depth), basic colour (gamma and colour mode) and more. Adjusted parameters can be saved along with other settings as a profile, and up to seven profiles can be stored for later recall.
120fps shooting at HD resolution
When shooting movies in the APS-C (Super 35mm equivalent) crop mode, the α7s supports high-frame-rate 120fps shooting at HD resolution (1280 x 720 pixels). This remarkable capability broadens image expression options since a movie shot at this frame rate can be played back at 24p to create stunning 5x slow-motion effects.
Enhanced Fast Hybrid Autofocus
Numerous features contribute to the Diamond's autofocus capabilities: the new lightning-fast BIONZ™ X, high-speed full-frame image sensor output, and a newly developed Spatial Object Detection AF algorithm that conducts focusing analysis in real-time using spatial frequency information to optimally control the lens drive.
Magnesium alloy body
Thanks to this outstandingly light and strong metal, the α7s weighs 489 grams with battery—less than half the weight of leading DSLRs —but has the durability for years of performance.
Dust and moisture resistance
Durability-enhancing measures include sealing around the buttons and dials, as well as a protective double-layered structure that tightly interlocks panels and components.
XGA OLED Tru-Finder
This viewfinder features high 1024x768 resolution, OLED improvements and the same 3-lens optical system used in the flagship α99 despite the compact body. The viewfinder displays the effects of your camera settings, so you can accurately monitor the results. You'll enjoy rich tonal gradations and three times the contrast of the α99. High-end features like 100% frame coverage, wide viewing angle, information display modes, peaking function, and focus magnifier are also provided.
Tiltable LCD screen
7.5 cm, 1.2 million dot LCD offers high resolution and flexible composition options
Controls, customization and navigation
Despite compact dimensions, the α7s features front and rear dials for intuitive setting of exposure, a control wheel for setting ISO, and an exposure compensation dial. Quick Navi Pro displays all major shooting options on the LCD screen so you can rapidly confirm settings and make adjustments as desired without searching through dedicated menus. Button customization empowers you to shoot just the way you like, with frequently used functions assigned to the customizable buttons of your choice. You can easily assign various functions to any of 9 buttons; and selected key functions can be assigned to the Fn button for quick access.
NFC simplifies Wi-Fi connection
Wi-Fi enables easy sharing of photos with devices such as smartphones, tablet PCs and TVs, while NFC simplifies initial linking with Android-equipped mobile devices. Smart Remote Embedded enables remote control of the camera from a mobile device and newly features a movie recording start/stop function.
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