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全画幅持续发力 索尼发布4K微单A7s

作者:网易  来源:网易   更新:2014-4-8 9:19:08  点击:  切换到繁體中文

 

索尼正式在NAB展会发布 A7s,S代表“Sensitivity”。此机同时考虑图片和视频拍摄,采用新款 1220万像素全画幅 Exmor CMOS 传感器,BIONZ X处理引擎。ISO 50-409600;也是目前第一款全幅传感器可以全部像素读取制作视频的机子;4k的视频能力;高动态范围和颜色还原,价格稍后公布,出货在夏季。


索尼正式发布4K全画幅微单A7s


ISO这边图片跟视频有些区别:拍摄照片上 ISO 100-102400,可扩展到 50-409600;视频是 200-102400,可扩展 200-409600


视频方面:


- 4k 8-bit 4:2:2 @30p, 采用 HDMI 输出。


- full HD (1920×1080) @ 60p, 60i, 30p and 24p


- standard HD (1280 x 720) @ 120fps


具备 S-Log2 gamma,除了AVCHD, MP4格式,支持 XAVC S格式,最高数据流 50Mbps; 可选 XLR接口


英文具体规格。


General
Lens mount α 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
Video compression XAVC S: MPEG-4 AVC/H.264
AVCHD: MPEG-4 AVC/H.264
MP4: MPEG-4 AVC/H.264
Audio recording format XAVC S: LPCM, 2ch
AVCHD: Dolby Digital (AC-3), 2ch, Dolby Digital Stereo Creator
MP4: MPEG-4 AAC-LC, 2ch
Image size (pixels) 1080 60i compatible device 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 (30fps/3Mbps)
1080 50i compatible device XAVC S: 1920 x 1080 (50p/50Mbps, 25p/50Mbps, 24p/50Mbps), 1280 x 720 (100p/50Mbps)
AVCHD: 1920 x 1080 (50p/28Mbps/PS, 50i/24Mbps/FX, 50i/17Mbps/FH, 25p/24Mbps/FX, 25p/17Mbps/FH)
MP4: 1440 x 1080 (25fps/12Mbps), 640 x 480 (25fps/3Mbps)
Movie functions Audio Level Display, Audio Rec Level, Auto Slow Shutter, HDMI info. Display (On/Off selectable), Time Code/User Bit, Clean HDMI output for 4K, 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
Clean HDMI output 1080 60i compatible device 3840 × 2160(30p/24p) / 1920 × 1080(60p/24p) / 1920 × 1080(60i),YCbCr 4:2:2 8bit/ RGB 8bit
1080 50i compatible device 3840 × 2160(25p) / 1920 × 1080(50p) / 1920 × 1080(50i),YCbCr 4:2:2 8bit/ RGB 8bit
Media
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 attached)
Exposure control
Metering type 1200-zone evaluative metering
ISO sensitivity (Recommended Exposure Index) Still images: ISO 100-102400, Movies: ISO 200-102400 equivalent (both expandable to 409600)
Viewfinder
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
` Camera Apps Yes
Interface
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
Shutter
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
Power
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)
Weight
With battery andMemory Stick PRO Duo Approx. 489g (approx. 1 lb 1.2 oz)
Body only Approx. 446g (approx. 15.7 oz)
Dimensions
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°-104°F / 0-40°C
Specifications and features are based on information available at the time of printing and are subject to change without notice.
*1 Configuration method/Access method: WPS or manually/infrastructure mode. When connecting to smartphones, the camera can always work as a base without a wireless access point. (Security: WEP/WPA-PSK/WPA2-PSK)
*2 Indicated recording time is defined by repeating the following cycle: Power on, start recording, zoom, stand-by and power off.
*3 Indicated recording time is defined by repeating the following cycle: Pressing the MOVIE button. No other operations such as zoom are performed.


 

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