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关闭窗口 全画幅持续发力 索尼发布4K微单A7s
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。
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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