от:Montbrillant
High-speed Communication with the Camera
Designed to quickly process data, the RF 50mm F1.2 L USM features a 12 pin communication system that is the fastest yet for a Canon lens/camera combination. This accelerates AF, Image Stabilization, the Digital Lens Optimizer and more, helping to simplify complex operations and provide a quick and reliable user experience.
Lens Information Display
Another helpful feature, the EOS R camera can display lens information right in the viewfinder, making it easy to confirm the lens's focal length without looking away from the subject at hand.
In-camera Digital Lens Optimizer
The EOS R system's 12 pin communication system enables the Digital Lens Optimizer, which works in-camera to combat aberrations and image deterioration, especially in the edges of the image frame when shooting at a large aperture. Data from the RF 50mm F1.2 L USM lens is transferred automatically to the camera body, facilitating near immediate correction for clear, detailed images.
Ссылка www.usa.canon.comПодробнее
Я бы добавил еще.
Где то проскакивало увеличение контактов питания. Большие скорости требуют больших пусковых токов.





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