In addition to offering the S-Log 3 curve that promises 15 stops of DR in video, it also offers the S-Gamut3 and S-Gamut3.Cine color modes that match Sony's professional video cameras' output. Also like the a7S III it can output 16-bit Raw video output over HDMI. Sony says it uses 5.8K pixels in its Super 35 (~APS-C) mode, but there's no talk of a 4K-from-8K mode. Like the a7S III, it can shoot 4K at up to 120p in 10-bit 4:2:2 quality. It has an impressive 0.9x magnification and an eye-point of 25mm, which should allow the finder to be seen even when wearing glasses. The faster mode still offers 1600 x1200 pixel (5.76M dot) resolution. The camera has a 9.44M dot OLED viewfinder that can be refreshed at up to 240fps. It boosts the number of AF and AE calculations it can do to 120 per second: twice as many as the a9 performs. The a1 pushes the autofocus forward from the a9 cameras, offering 92% coverage and now expanding its 'Real-time Eye AF' to work with birds, as well as animals and people. This system is also used to offer 4 or 16-shot high-resolution modes, allowing images of up 199MP to be combined using Sony's Imaging Edge desktop software. The camera's in-body image stabilization system is rated at 5.5EV, as with previous cameras. The new processors also bring the improved menu system first seen in the a7S III. It uses a pair of CFExpress Type A card slots that, like those in the a7S III, also accept SD cards. It becomes the first Sony camera to offer Lossless compress Raw and can also capture HEIF for 10-bit compressed capture. Read our 'What You Need to Know' guide, based on discussions with Sony The camera uses a similar heat-dissipating design to the a7S III, allowing it to record 8K for up to 30 minutes, if the temperature warnings are set to their most tolerant setting. 8K footage can be captured in up to 10-bit 4:2:0 using the XAVC HS format. This uses all its horizontal pixels, capturing 8.6K footage and downsizing it to 8K to provide improved resolution. The a1 can shoot 8K video at up to 30p using its full width. This allows flash sync at up to 1/200 sec with the electronic shutter or 1/400 sec using the mechanical shutter. Despite having twice as many pixels as the a9, the a1 promises to have 1.5x less rolling shutter. It uses a stacked CMOS sensor and a pair of new Bionz XR processors, allowing silent, no-blackout images at up to 30 fps. Sony has announced the Alpha 1, a fast, high-res 50MP camera capable of shooting at 30 fps with no blackout.
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