Sony announced today A7S will cost $2,500 higher than the A7 which is $1,700 and $2,300 of A7R (the U.S. market). However, given the features like full-frame sensor of 12.2 megapixels, 4K video recording (stored on external memory) and an ISO range of up to 409,600 support, it is very worthwhile for a mirrorless camera.
Alpha A7S sensors use 12 megapixel full-frame design optimized for photography and filming. Even though Sony camera’s hardware is not enough to save the movie in 4K format content, one can use HDMI connection similar to the HDR – CX900 Handycam models. To get the 4K footage, the user needs to add a receiver and a high-capacity memory.
This output supports standard 8 bit 4:2:2 4K at 30 frames per second. In addition, unlike the A7 and A7R models, the new model is no longer bound by the AVCHD standard, and is compatible with the system XAVC S with bitrate up to 50 Mb/sec. Machine is equipped with Dual Recording mode which allows recording video in low bitrate HD and Full HD XAVCS.
Doesn’t have 24 megapixels like A7 or 36 megapixels like A7R but images will have larger pixels and reduce noise better. Sony says supports ISO range from 100 to 102,400 and extension in the range of 50-409,000, equivalent to advanced Nikon DSLR like D4S and mirrorless camera is the best on the market today. This is why Sony products named with the suffix “S” which stands for sensitivity. However, A7S sensor will only support traditional contrast AF.
Other features include Sony’s best video editing software, S – log2 gamma range dynamic contrast brings improved shadow detail, the same as those high end FS series from Sony. Sony also said it is developing the 28 – 135mm F4 Powerzoom lens for filming professionals.