Sony has unveiled a 12-million-pixel full-frame compact system camera, the Alpha 7S, which adds 4K video and an ISO range of 50-409,600.

The E-mount Alpha 7S is aimed at serious photographers and videographers.

‘Because of the image sensor’s extraordinary sensitivity, the amount of light it can collect is dramatically increased compared with conventional cameras,’ read a Sony statement.

Sony claims that the A7S’s ‘unprecedented dynamic range’ is ideal for ‘high-contrast scenes, effortlessly handling extreme highlights and rich, deep blacks in the same frame’.

‘With a 12.2 effective megapixel count, the size of each individual photoreceptor site is significantly boosted to increase their light-gathering power.’

Key to the new camera is the addition of 4K video.

‘Thanks to the full pixel read-out from the whole of the 35mm full-frame sensor, there’s a notable absence of undesirable aliasing (moiré) effects and “jaggies” that betray lower-resolution video.’

Sony claims that, in APS-C crop mode, the A7S supports high-frame rate video shooting at 120 or 100 frames per second with HD resolution.

The A7S is due out in the summer at a price yet to be announced.