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Sony A7S specs announced - S for sensitivity. 4K via HDMI to "third party recorder"

Andrew Reid

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sony a7s

Breaking news... The Sony A7S has been announced at NAB 2014.

It records 1080p internally in XAVC-S format at 50Mbit but the big news is the support for full 4K output via HDMI to an external recorder.

Unfortunately it does NOT have an internal 4K recording codec like the Panasonic GH4.

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I can guarantee that the internal XAVC-S 1080p from the A7S will not look as good as getting 1080p from the 4K output and doing your scaling in post with all that processing power available on your de

Many in same boat as you, simply edit in 4K and deliver as 2K. Many benefits to it.   Difference is a click of a button and that is it.

Crossing my fingers someone announces a cheaper 4k recorder for the a7s.   $2k for the Shogun is too rich for my blood. I'd rather put that kind of money to the gh4 is this is the only alternative.

If it's the same form factor as the A7/R and they had problems to fit a proper shutter in it, does it mean that the rumor about high fps burst was wrong or is it a different type of body? The press release doesn't say anything about it.


They using the same form factor should explain why it can't do 4K internally, overheating problems I guess. One thing is to output it without processing it, another is to keep the sensor up and processing all the 4K data and encoding it.


So Sony opted for a smaller body instead of doing 4K internally and aiming towards a higher crowd that is willing do 4K externally. The 12MP was a step forward, keeping a smaller formfactor just for the sake of size sacrificing internal 4K was a step back. They are not wrong because they are aiming higher, but maybe it looked too optimistic for thinking that Sony could do it for consumers.

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Sony introduces GH3 killer! So disappointing.


I don't really get why everyone is disappointment with this announcement.


I figured most people want a 4K GH4 so that they can get a better 1080p end product. Or am I the only one who doesn't care about a 4K export? By the time I get a 4K TV or monitor, I'll be a couple of camera body upgrades down the road.


So, if the A7S produces better quality 1080p than the GH3 or GH4 can achieve (and that's a big if) then the A7S suddenly looks very appealing. And that's not even mentioning the full frame sensor (with no pixel binning), slow motion abilities and supposedly amazing low light capabilities. 


Hopefully Andrew is getting an A7S soon for testing!

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