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.

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

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

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...

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.

The Sony Alpha 7S ($2,499.99, body only) is the third camera in Sony's full-frame mirrorless family. The 12-megapixel shooter joins the 24-megapixel Alpha 7 and 36-megapixel Alpha 7R , but its resolution isn't the only differentiating factor.

Amazing high ISO capability; Full-frame image sensor; 5fps burst shooting; Sharp, tilting rear LCD; Excellent OLED EVF; Great control layout; Compact, dust and moisture-resistant body; Vertical shooting grip available

4K recording requires external recorder; No PC sync socket; No built-in flash; Limited native lens selection; Overactive EVF eye sensor

The Sony Alpha 7S ($2,499.99, body only) is the third camera in Sony's full-frame mirrorless family. The 12-megapixel shooter joins the 24-megapixel Alpha 7 and 36-megapixel Alpha 7R , but its resolution isn't the only differentiating factor. The 7S can be pushed all the way to ISO 409600, and although image quality suffers at that extreme setting, its capabilities at less-staggering sensitivities outpace the competition. It can also record video in 4K resolution, but you'll need to add an external recorder to do that. If shooting in dim light is a must, the Alpha 7S may be the best of the trio for you. But we still prefer the high-resolution 7R as our Editors' Choice, and recommend the Alpha 7 for shooters who require quick autofocus or want to get the best quality out of adapted lenses. Build The Alpha 7S is, aside from its name badge, physically identical to the Alpha 7 and 7R. It's compact when you consider that the body houses a full-frame sensor, measuring just 3.75 by 5...

The Sony Alpha 7S full-frame mirrorless camera offers incredible performance in low light, but you'll need an external recorder to take advantage of its 4K video support.

Amazing high ISO capability; Full-frame image sensor; 5fps burst shooting; Sharp, tilting rear LCD; Excellent OLED EVF; Great control layout; Compact, dust and moisture-resistant body; Vertical shooting grip available

4K recording requires external recorder; No PC sync socket; No built-in flash; Limited native lens selection; Overactive EVF eye sensor

The concept of a 36.4 mega pixel, full-frame, compact system camera is great. I was looking for a light, high quality product for travel photography - I'm really fed up of heavy cameras. Unfortunately, this is not the answer.

Sony caused a major stir in the photographic world when it introduced the 24Mp Alpha 7 and 36Mp Alpha 7R because they were the first compact system cameras to have full-frame sensors. This is something that has still yet to be done by any other manufacturer.

Sony now has three full-frame compact system cameras to give photographers a choice depending upon what is most important to them. Those wanting the ultimate in detail resolution should opt for the 36Mp Sony Alpha a7R , while photographers for whom low-light capability and video quality are of...