Sony A7s Quad HD camera
· Wide ISO sensitivity setting 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
· Improved Fast Intelligent AF performance in light as low as EV-4
Sony has announced the A7s, a mirrorless 4K camera (actually it is Quad HD) with a high ISO range going upto 409600. For movies the range is ISO 200 to ISO 409600.
This camera has a newly developed full frame 35mm Exmor CMOS sensor. The data read out is from every pixel and it doesn’t employ pixel binning technology. For example, other cameras with a higher Mega pixel sensor employ pixel binning technology to reduce the pixels while shooting video.
It is interesting to note that this camera cannot record 4K video internally. It outputs the 4K video (actually quad HD ie. 3840x2160) from the HDMI connector with 4:2:2 colour sampling to be recorded in an external recorder.
The camera records Full HD internally with XAVC format at 50 Mbps to XDHC cards.
According to Sony, its BIONZ X processor reduces noise and increases the sensitivity to ISO 409600. So you can shoot lot of night scenes using these high ISOs.
Limiting the sensor to only 12.2 Mega pixel helps in the full pixel read-out. This is likely to improve the aliasing effects which is the bane of many a DSLR camera.
In APS-C crop mode, the α7S supports high frame rate shooting at 120fps or 100fps with HD resolution 720p.
The S-Log 2 is also available so that one can shoot in a flat picture profile which is good for editing.
There is an optional XLR Adaptor Microphone Kit available which can help in using XLR microphones for pro-style sound recording while shooting video.
Other features familiar to α7 users include a high-contrast XGA OLED Tru-Finder, Wi-Fi/NFC connectivity.
This camera is likely to be available in summer 2014.