Some Sony cameras, such as the FX3 and FX6, use CFexpress Type A cards instead of relying solely on standard SD cards due to the performance demands of high-end video recording. While SD cards can handle many commonly used codecs and are sufficient for most 4K formats, they have speed limitations that can affect reliability during intensive shoots. CFexpress cards offer significantly faster read/write speeds and superior thermal management, making them better suited for higher-bitrate codecs and sustained recording at high frame rates, such as 4K 120p or 10-bit 4:2:2 All-I. This enhanced performance allows creators to unlock the full potential of the camera’s recording capabilities without risking dropped frames or buffer issues. In professional workflows where reliability, speed, and codec flexibility are critical, CFexpress cards ensure smooth, consistent performance, which is why they’re increasingly preferred in Sony’s cinema line.
