Sony A7s review: The Sony Alpha 7s adds a slew of new professional features to the company's popular full-frame compact camera. Our head of testing put it through its paces in her latest review video.

Sony's moves in the field of consumer electronics can seem genius at times, and baffling at others. Its new full-frame mirrorless camera, the A7s, is a little bit of both. It's a camera that looks and functions exactly as previous A7 models, but with a few very specific and exciting features...

Announced in April, the Sony Alpha A7S is a 12.2 megapixel full-frame mirrorless camera, with 4K video recording (with an external recorder), and an impressive ISO range from ISO50 to ISO409600 for both stills and video. The Sony Alpha A7S is available for ￡2099 body only.

12 megapixel files are smaller; Impressive ISO range available for stills and video; Very impressive noise performance up to ISO25600 / ISO51200; Full-frame sensor mirrorless camera; Focus peaking / Zebra display; 5fps continuous shooting (speed priority; Weather sealed magnesium alloy body,...

4K only available when recording to an external device; 4K external recording device isn't available yet; High price if you want to record 4K video; Limited lens range in FE mount (plenty of adapters available; Flash not included / provided - although possibly not needed

When Sony launched the A7 and A7R towards the end of last year, it broke new ground with the combination of an impressive full frame sensor in a portable and compact CSC body, gaining many accolades in the process.

High ISO performance; 4K video capture

4K video recorded to external device; AF not the fastest

Like it or not, we're on the verge of a 4K revolution. We've noted previously that even though content distribution is still "the rub," content creation and management couldn't be more straightforward.

Here is what I remember most about film: anticipation. Film added something to every shot, a tilt of color or light, a dash of magic that took the mundane and made it art.

It seems like it will break but I took it on a 4 day sailing trip with lots of motion and rain and it is OK

GREATE low light camera; I have,( like all us), never have taken photos at night without a flash; It is a new world I am just discovering; I own the A7R and the 7S has much better focusing

Changing batteries all the time

Great camera, fast shipping!!

In 2013 the Sony Alpha A7 convinced our team and a panel of tech-savvy judges that it was system camera of the year. Not because it had the most lenses available, was the fastest, nor because there weren't other great new cameras coming out, but because it broke the mould and stepped up where other...

Great full-frame image quality; sturdy build and small scale design; great electronic viewfinder quality; tilt-angle LCD with large view; two batteries included

Poor battery life; no wall charger means slow charge; full-frame lens range is lacking; AF-C not comparable to ￡2k DSLR; 4K capture off-camera only; much pricier than standard A7

I know this is a video version of the A7 family. The video is amazing, but this pictures are the most sublime. Not just low light- everything is amazing. Plenty of resolution if you aren't a power cropper.

Auto Focus is it's only weak point; though as good or a little better than A7