Sony A7s 4K Full Frame Mirrorless Camera Officially Announced

Sony has announced the Alpha 7S, 4K video recording full frame mirrorless camera designed for both stills and video.  The camera can read out its entire sensor fast enough to output 4:2:2 4k video over HDMI at up to 30p, without the need for line skipping or pixel binning.

The Sony A7S features a new 12.2-megapixel with a 35mm full-frame sensor, 4K movie recording, ISO 50 to 102,400 (extendable to ISO 409,600) and an improved auto focus system that remains operational down to light levels as low as -4EV.

The “S” in the camera’s name denotes “sensitivity”. In movie shooting, it offers an ISO 200 – 102,400, with extension to 409,600. In stills it offers ISO 100 – 102,400, extendable to an ISO 50 – 409,600 range.

The camera’s professional video functions include XAVC S Full HD recording at 50Mbps, time code and optional XLR audio inputs.

Sony A7s 4K Full Frame Mirrorless Camera Officially Announced


Sony A7s 4K Full Frame Mirrorless Camera Price

The new Sony A7S full-frame digital camera with 4K video recording will be available in Summer 2014. Sony has also said it is developing a movie-focused 28-135mm F4 Powerzoom lens. Pricing has not yet been announced for either product.

Sony A7s 4K Full Frame Mirrorless Camera Key Features

  • Wide ISO sensitivity setting[1] from 50 to 409600 and unprecedented dynamic range
  • World’s first full-frame sensor capable of full pixel read-out without pixel binning process for movie and 4K (QFHD: 3840 x 2160) HDMI video output
  • Professional video functions including XAVC S Full HD recording at 50Mbps, time code and optional XLR audio inputs
  • High ISO sensitivity range allows faster shutter speeds during low light shooting
  • α Mount System compatible with a wide range of high quality lenses, including power zoom lens ideal for movie shooting
  • Improved Fast Intelligent AF performance in light as low as EV-4
  • Ultra compact, light-weight body for comfortable pro-style operation

Sony A7s 4K Full Frame Mirrorless Camera Specifications

Lens mount   alpha E-mount
Image sensor
Type 35mm full frame (35.6 x 23.8mm), Exmor CMOS sensor
Number of pixels (effective) Approx. 12.2 megapixels
Recording system (still images)
Recording format JPEG (DCF Ver. 2.0, Exif Ver. 2.3, MPF baseline compliant),
RAW (Sony ARW 2.3 format)
RAW output 14 bit
Recording system (movies)
Recording format XAVC S / AVCHD format Ver. 2.0 compliant / MP4
MP4: MPEG-4 AVC/H.264
Audio recording
AVCHD: Dolby Digital (AC-3), 2ch, Dolby Digital Stereo
MP4: MPEG-4 AAC-LC, 2ch
Image size
XAVC S: 1920 x 1080 (60p/50Mbps, 30p/50Mbps,
24p/50Mbps), 1280 x 720 (120p/50Mbps)
AVCHD: 1920 x 1080 (60p/28Mbps/PS, 60i/24Mbps/FX,
60i/17Mbps/FH, 24p/24Mbps/FX, 24p/17Mbps/FH)
MP4: 1440 x 1080 (30fps/12Mbps), 640 x 480
Movie functions Audio Level Display, Audio Rec Level, Auto Slow Shutter,
HDMI info. Display (On/Off selectable), Time Code/User
Bit, Picture Profile, Creative Style, Picture Effect, Rec
Control, Dual Video Rec, Marker Setting
Picture Profile Yes (Off / PP1-PP7) Parameters: Black level, Gamma
(Movie, Still, Cine1-4, ITU709, ITU709 [800%], S-Log2),
Black Gamma, Knee, Colour Mode, Colour Level, Colour
Phase, Colour Depth, Detail, Copy, Reset
Clean HDMI output
Output signal 3840 × 2160(30p/24p) / 1920 × 1080(60p/60i/24p)YCbCr 4:2:2 8bit/ RGB 8bit
Media Memory Stick PRO Duo, Memory Stick PRO-HG Duo,
Memory Stick XC-HG Duo, SD memory card, SDHC
memory card (UHS-I compliant), SDXC memory card
(UHS-I compliant)
Focus system
Type Contrast-detection AF
Focus point 25 points
Sensitivity range EV -4 to EV 20 (at ISO 100 equivalent with F2.0 lens
Exposure control
Metering type 1200-zone evaluative metering
ISO sensitivity (Recommended Exposure
Still images: ISO 100-102400, Movies: ISO 200-102400
equivalent (both expandable to 409600,for still:
expandable down to 50)
Type XGA OLED, 1.3cm (0.5 type) electronic viewfinder (colour)
Total no. of dots 2,359,296 dots
Field coverage 100%
Magnification Approx. 0.71x (with 50mm lens at infinity, -1m-1)
LCD screen
Type 7.5cm (3.0 type) TFT drive
Total number of dots 921,600 dots
Adjustable angle Up approx. 90 degrees, down approx. 45 degrees
Other features
PlayMemories Camera Apps Yes
Wireless LAN (built-in) Wi-Fi Compatible, IEEE802.11b/g/n (2.4GHz band)*1
Playback of still images and movies on smartphones, PCs
and TVs
NFC™ Yes (NFC Forum Type 3 Tag compatible, One-touch
remote, One-touch sharing)
Multi Interface Shoe Yes
HD output HDMI micro connector (Type-D), BRAVIA Sync (link menu),
PhotoTV HD, 4K still image playback
Type Electronically controlled, vertical-traverse, focal-plane type
Shutter speed Still images: 1/8000 to 30 sec., Bulb
Movies: 1/8000 to 1/4 (1/3 step), Up to 1/60 in AUTO
mode (up to 1/30 in Auto Slow Shutter mode)
Electronic front curtain shutter Yes, On/Off
Drive modes Single shooting, Continuous shooing, Speed Priority Continuous shooting, Self-timer (10/2 sec. delay selectable), Self-timer (Cont.) (10 sec. delay, 3/5 exposures selectable), Bracketing (Cont., Single, White Balance, DRO)
Speed (approx.., max)
* May vary depending on shooting conditions and media)
Continuous shooting: Max. 2.5fps,
Speed Priority Continuous Shooting: Max. 5.0fps
Battery Rechargeable battery pack NP-FW50
Still images Approx. 320 shots (viewfinder) / approx. 380 shots (LCD
screen) (CIPA standard)
Movies Actual*2: Approx. 55 min with viewfinder, approx. 60 min
with LCD screen (CIPA standard)
Continuous*3: Approx. 90 min with viewfinder, approx. 90
min with LCD screen (CIPA standard)
External power AC Adaptor AC-PW20 (optional)
With battery and Memory Stick PRO Duo Approx. 489g (approx. 1 lb 1.2 oz)
Body only Approx. 446g (approx. 15.7 oz)
W x H x D (excluding protrusions) Approx. 126.9 x 94.4 x 48.2mm (approx. 5 x 3 3/4 x 1
15/16 in.)
Operating temperature
Range 32 degrees – 104 degrees F /  0-40 degrees C

Sony A7s 4K Full Frame Mirrorless Camera Product Images