In a statement about the Alpha 7S II, Sony UK said: ‘It is designed to eliminate the occurrence of a black spot that may appear in frame when shooting in a specific set of high-intensity light conditions.’

The version 1.10 firmware is available to download via the Sony website.

The full-frame Alpha 7S II was announced in September, priced £2,500.

Features include a top ISO of 409,600 and 4K video.

The camera, which boasts a shutter cycle of 500K, was announced at the IBC broadcast technology show in Amsterdam, the Netherlands.

The 12.2-million-pixel Alpha 7S II is designed to shoot 4K video with full-pixel readout and ‘no pixel binning in full-frame format’. This should mean better image clarity.

Sony also upgraded the AF to offer 169 AF points – for ‘fast, precise focusing with greater accuracy’.

The firm claimed at the time: ‘When shooting video, the AF performance is twice as fast as the predecessor.’

The EVF was also improved, to deliver 0.78x magnification.

To download the firmware update, visit the Sony website.