Bringing its line of full-frame interchangeable-lens mirrorless cameras up to six models, Sony launches the last of the Mark II updates: the A7S II. The upgrades to the video-focused A7S II mostly bring the design and features introduced with the A7R II , but they're pretty important -- some might say essential -- changes for this model's intended user. At its core, however, the A7S II retains the same large 12.2-megapixel, high-sensitivity sensor.

Sony's full-frame Mark II hat trick concludes with an update to its low-light and video-optimized mirrorless model.

So far, we're expecting pretty much more of the same–excellent high ISO results, great focusing, but not incredibly detailed images since this is just a 12.2MP sensor. But that's what the A7 Mk II and the A7r Mk II are for.

Sony updates its video and low-light Alpha 7-series CSC with internal 4K recording, better noise control and improved autofocusing. Find out our head of testing's first impressions in her Sony A7S II hands-on review.

Overall, despite its very high price, we love the Sony A7S II and for users who want a superb compact mirrorless camera for low light video and photo shooting, we pretty much can't recommend a better device.

Absolutely superb nigh and low light shooting ability; Excellent EXMOR full-frame sensor; Robust build; 169 AF points; Massive ISO; Remarkably crisp 4K and Full HD video quality

Expensive; very expensive; Could use better organized touchscreen menu controls

We got some early hands-on time with the Sony A7S II last night, a full frame, mirrorless camera we have dubbed "the master of the dark arts" for its impressive low light shooting prowess.

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Really the only choice for poor/low light Video or shooting stills in the dark. Very clean at ISO 6400+ New 1080P120 is exceptionally even with internal codec. Very smooth and detailed. It can keep up with most action. Also good for slow motion that I do not use.

I don't know that a more capable videography/photography device exists in this size. The a7S is back with everything the first generation was missing (I had one). This is the ultimate low-light shooter for video and photography.

Now with Internal 4K; LUTs and IBIS! Low light monster Gorgeous video and photo Small and light package Adapt lenses from almost any system ever

Internal recording codec could be better Menus still mostly suck Limited system lenses 12MP limits post-processing options

When Sony launched the Alpha 7 and Alpha 7R two years ago, the manufacturer was looking to target two different types of photographer. While the Alpha 7 was out to appeal to enthusiasts looking for a full-frame camera with an ‘all-round' level of performance, the Alpha 7R was aimed at landscape and...

Sony continues to take a three-camera approach with its second-generation full-frame mirrorless system. At one end of the spectrum sits the high-resolution, 42-megapixel Alpha 7R II , and at the other is the 12-megapixel Alpha 7S II ($2999.99, body only).

Full-frame 4K video recording; Incredible high ISO image quality; 5fps burst shooting; In-body image stabilization; Hinged rear display; Sharp EVF; Dust- and moisture-resistant design

Expensive; 12-megapixel resolution can be limiting; Omits PC sync socket; Overly sensitive eye sensor; No built-in flash