Vào rạng sáng nay, Sony họp báo chính thức công bố mẫu máy Fullframe A7s. Chữ "S" trong tên model viết tắt của cụm "Sensivity", một body có độ nhạy sáng khủng trong một thân máy nhỏ gọn. Một số đặc điểm nổi bật của Sony A7s:
- Độ nhạy sáng cực cao và dãi màu rộng hơn: ISO 50 - 409600 giúp cho việc tăng tối ưu tốc độ chụp trong môi trường thiếu sáng. Đây là dãi ISO rộng nhất chưa từng có. Dynamic range của Sony A7s từ EV-4 tới EV20, với khoảng EV này thì có thể thách thức mọi môi trường thiếu sáng.
- Quay phim 4k (QFHD: 3840 x 2160) HDMI video output. Quay phim chuyên nghiệp chuẩn XAVC S Full HD (chuẩn codec tiên tiến nhất hiện nay) và ghi âm chuẩn 50Mbps, tùy chọn đầu vào âm thanh XLR (chuẩn chuyên nghiệp dành cho các phòng thu).
- Cải thiện hệ thống lấy nét tự động thông minh trong ánh sáng yếu (EV-4)
Một số video giới thiệu về A7s:
Các thông số chính của Sony A7s:
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 42 8bit/ RGB 8bit
1080 50i compatible device 3840 × 2160(25p) / 1920 × 1080(50p) / 1920 × 1080(50i),YCbCr 42 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