The Sony Alpha 7 series seems to be the one to watch when it comes to pure innovation, with the 7 and 7R being the first compact system cameras to feature a full frame sensor back in October 2013.
The Sony Alpha 7s has now joined the line-up, adding a 4K video solution to the mix, and making it a serious option for DSLR / CSC film makers, as well as a direct rival to Panasonic's GH4.
If the video quality of the 7R is anything to go buy then that from the 7s should be equally impressive, and the 7s is directly aimed at the DSLR / CSC film maker.
One specification that instantly stands out is the drop to a 12.2 million pixel sensor; this drop in pixel count is likely to be in order to enhance video capture quality.
This new 12.2 million pixel sensor enables a sensitivity range of ISO 200 to 409600 for movies and 50-409600 for stills.
This maximum sensitivity of ISO 409600 for stills is the same as the recently released Nikon D4s, but with this camera aimed at video makers rather than the D4s' stronghold of press photographers, it's going to be interesting to see what the quality for both images and video will be at this maximum value.
When it comes to video recording formats are all important, as they directly affect the quality of capture and flexibility of the camera in different environments.
The Alpha 7s features a range of recording formats that will appeal to professional video makers, including clean HDMI output for high quality and flexible 4K recording. This enables uncompressed video capture at 4K (QFHD; 3840 x 2160 pixels), with selectable 30p and 24p frame rates, which is then captured on an external video recorder.
Of course while 4K is the buzz, today you still need to record in HD and without the ties of external recorders, so when it comes to capturing video on memory card the 7S is capable of using the XAVCs format, which enables Full HD recording at 50mbs.
There are a host of other features that show that the 7S is a serious choice for video makers, including the S-Log2 gamma setting – common in commercial video equipment and no doubt a direct link to Sony's broadcast heritage. This enables better colour grading in post production by creating a claimed 1300% wider dynamic range to reduce whiteout and blackout.
When it comes to styling your own footage Sony have added the ability to adjust gradation (Black level, gamma and black gamma) along with colour adjustment (colour tone and depth), once the look you want has been created it can then be saved and used as a profile which is extremely useful.
The sound capabilities, as with the 7R, include audio in and out as well monitoring.
We'll bring you more on the Alpha 7S soon.
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