The α1 viewfinder does not black out when an exposure is made, so you have an uninterrupted view that allows smooth, seamless framing and tracking even during continuous shooting. High readout speed from the new image sensor makes it possible to refresh the live-view EVF display 2400 times per second while shooting continuous bursts, overcoming the distracting time lag that is usually associated with EVF viewing.
(A) Blackout-free Shooting (B) Shooting with blackouts
The high sensor readout speed of the α1 allows up to 120 AF/AE calculations per second0 at the focal plane, even while shooting continuously at up to 30 fps1. Complex, erratic subject motion is tracked with higher precision than ever, and exposure can be automatically adjusted even through sudden brightness changes. AF response latency is as low as 0.033 second2 for consistently accurate exposure.
(1) 120 times/sec. AE/AF calculation (2) 30 fps (3) Frames
High-speed readout from the new image sensor has made it possible to provide Anti-flicker Shooting with an electronic shutter for the first time0. This enables blackout-free shooting, up to 120 AF/AE tracking calculations per second, up to 30 fps continuous shooting1, silent shooting, and other advantages of the electronic shutter without flicker issues when shooting under fluorescent, LED or other flicker-prone types of artificial light.
Anti-flicker  ON  OFF
A high-precision stabilization unit and gyro sensors, plus optimized image stabilization algorithms, achieve up to a 5.5-step shutter speed advantage, maximizing the quality of the high-resolution images derived from the camera’s 50.1-megapixel sensor. The α1 also features an Active Mode that offers outstanding stabilization for handheld movie shooting.
 Yaw  Pitch  Roll
Full frame and Super 35 formats can be selected for 4K movie recording. Full pixel readout in the Super 35 mode (approx. APS-C 16:9), without the need for pixel binning, makes it possible to condense approximately 2.3 times the amount of data required for 4K movies, resulting in high-resolution, high-detail 4K with minimal moiré and jaggies. Bit rates up to 600 Mbps can be used for 4K XAVC HS, XAVC S, and XAVC S-I recording.
(A) 2.3 times information
M and S size images have the same number of pixels in the full-frame and APS-C modes0, so you can switch seamlessly between full-frame [M:M21] and APS-C [M:M21], for example, while shooting the same scene. And because the full array of 759 phase detection points is available in APS-C mode as well as full-frame mode, you get the same smooth AF performance.
 Full Frame  APS-C