The Sony Alpha a7S Mirrorless Digital Camera features a full-frame 12.2MP Exmor CMOS sensor and BIONZ X image processor to enable notable video and still image quality with an expansive dynamic range, low noise, and extended sensitivity to ISO 409600. At the sensor level, this full-frame sensor features a unique on-chip gapless lens design, which incorporates small lenses between neighboring pixels in order to increase light-gathering efficiency and promote greater image quality across the entirety of the sensor plane. The sensor and processor combination also avails a wealth of speed throughout the camera system, including a top continuous shooting rate of 5 fps, support for 4K video recording, and a fast 25-point contrast-detection AF system with sensitivity to -4 EV.
Lens Mount Sony E-Mount Camera Format Full-Frame Pixels Actual: 12.4 Megapixel Effective: 12.2 Megapixel Max Resolution 12 MP: 4240 x 2832 Aspect Ratio 3:2, 4:3 Sensor Type / Size CMOS, 35.8 x 23.9 mm File Formats Still Images: JPEG, RAW Movies: MP4, MPEG-4 AVC/H.264 Audio: AAC LC, AC3, Dolby Digital 2ch, Linear PCM Bit Depth 14-bit Dust Reduction System Yes Memory Card Type SD SDHC SDXC Memory Stick PRO Duo (High Speed) Memory Stick PRO HG-Duo Memory Stick XC-HG Duo AV Recording Video Recording Yes, NTSC Resolution 1920 x 1080: 60 fps, 30 fps, 24 fps 1280 x 720: 120 fps 1440 x 1080: 30 fps 640 x 480: 30 fps Video Format High Definition 1920 x 1080p / 60 fps (50 Mbps) 1920 x 1080p / 30 fps (50 Mbps) 1920 x 1080p / 24 fps (50 Mbps) High Definition 1280 x 720p / 120 fps (50 Mbps) (50 Mbps) High Definition AVCHD 1920 x 1080p / 60 fps (28 Mbps) 1920 x 1080i / 60 fps (24 Mbps) 1920 x 1080i / 60 fps (17 Mbps) High Definition AVCHD 1920 x 1080p / 24 fps (24 Mbps) 1920 x 1080p / 24 fps (17 Mbps) High Definition MP4 1440 x 1080p / 30 fps (12 Mbps) Standard Definition MP4 640 x 480p / 30 fps (3 Mbps) Aspect Ratio 4:3, 16:9 Video Clip Length Not Specified By Manufacturer Audio Recording Built-in Mic: With Video, Stereo Optional External Mic: With Video Focus Control Focus Type Auto & Manual Focus Mode Continuous-servo AF (C), Direct Manual Focus (DMF), Manual Focus (M), Single-servo AF (S) Autofocus Points Contrast Detection: 25 Viewfinder/Display Viewfinder Type Electronic Viewfinder Size 0.5" Viewfinder Pixel Count 2,359,296 Viewfinder Eye Point 27.00 mm Viewfinder Coverage 100% Viewfinder Magnification Approx. 0.71x Diopter Adjustment - 4 to +3 m Display Screen 3" Rear Screen Tilting LCD (921,600) Screen Coverage 100% Exposure Control ISO Sensitivity Auto, 100-102400 (Extended Mode: Auto, 50-409600) Shutter Type: Electronic & Mechanical Speed: 30 - 1/8000 second, Bulb Mode Type: Electronic & Mechanical Speed: 1/4 - 1/8000 second in Movie Mode Remote Control RM-VPR1 (Optional) Metering Method Center-weighted average metering, Multi-zone metering, Spot metering Exposure Modes Modes: Aperture Priority, Auto, Intelligent Auto, Manual, Movie, Programmed Auto, Scene Selection, Shutter Priority, Superior Auto, Sweep Panorama Metering Range: EV 3.0 - EV 20.0 Compensation: -5 EV to +5 EV (in 1/3 or 1/2 EV steps) White Balance Modes Auto, Cloudy, Color Temperature, Color Temperature Filter, Custom, Daylight, Flash, Fluorescent (Cool White), Fluorescent (Day White), Fluorescent (Daylight), Fluorescent (Warm White), Incandescent, Shade, Underwater Burst Rate Up to 5 fps at 12.2 MP for up to 200 frames Up to 2.5 fps at 12.2 MP for up to 200 frames Flash Flash Modes Auto Fill-in Hi-Speed Sync Off Rear Sync Red-eye Reduction Slow Sync Wireless Built-in Flash No Max Sync Speed 1 / 250 seconds Flash Compensation -3 EV to +3 EV (in 1/3 or 1/2 EV steps) External Flash Connection Hot Shoe, Proprietary Performance Continuous Shooting Up to 5 fps Self Timer 10 seconds, 2 seconds Connectivity 1/8" Headphone, 1/8" Microphone, DC Input, HDMI D (Micro), Micro-USB Wi-Fi Capable Yes Software System Requirements Windows: Vista (SP2), 7 (SP1), 8 Mac: OS X 10.6 or later Power Battery 1x NP-FW50 Rechargeable Lithium-ion Battery Pack, 7.2 VDC, 1080 mAh AC Power Adapter AC-PW20 (Optional) Operating/Storage Temperature Operating 32 to 104°F (0 to 40°C) Physical Dimensions (WxHxD) 5.0 x 3.7 x 1.9" / 126.9 x 94.4 x 48.2 mm Weight 1.08 lb / 489 g with battery and memory card