Here are the top recommended (fastest) SD memory cards for Sony a9 mirrorless camera.
As we all know, every second matters in photography, so a fast enough memory card is a must for serious photographers. The Sony a9 mirrorless camera ($4,498 at Amazon, B&H, Adorama) comes with 24.2MP Full-Frame Sensor, 693-Point AF System & 20 fps Shooting, Internal UHD 4K Video Recording and Dual SD Slots: the card slot 1 is compatible with ultra-fast UHS-II SD memory cards while the Card Slot 2 is compatible with UHS-I memory cards. If you want to shoot 4K video with the Sony a9, a fast UHS-II SD memory card is a must. But NOT all UHS-II cards have excellent performance: the Write Speed matters, the Write Speed is the key: Fast write speed provides fast buffer clearing time between burst shots optimizing your shooting experience. Fast read speed can let large files such as 4K video or a bunch of high-resolution images by continuous shooting transfer to PC in seconds.
And, if you plan to shoot videos, stick to 64GB or 128GB (or larger) SDXC cards for the best video codex.
Below are the top recommended memory cards for Sony a9, just choose the one you need!
Recommended UHS-II SD Memory Cards for Sony a9
The Sony SF-G UHS-II Cards are currently the world’s fastest SD memory cards boasting an ultra-fast maximum read speeds of up to 300 MB/s and maximum write speeds of up to 299 MB/s and it is well-suited for video capture, including 4K, 3D, HFR, and Full HD video. Up to 299MB/s write speed provides fast buffer clearing time between burst shots optimizing your shooting experience. In addition, with up to 300 MB/s read speed, even large files such as 4K video or a bunch of high-resolution images by continuous shooting can be transferred to PC in seconds. Stick to 64GB or 128GB SDXC cards for video.
The SanDisk Extreme PRO SD UHS-II Cards are well-suited for 4K, Full HD and 3D video recording, and can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 260 MB/s.
The Lexar Professional 2000x UHS-II SDXC card is very popular, but it is already discontinued. It can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 260 MB/s.
This steel plated memory card supports 4K Ultra HD video and features a read speed of up to 300 MB/s and a write speed of up to 260 MB/s making it easy to transfer large files quickly and efficiently.
Recommended UHS-I SD Memory Cards for Sony a9
In addition to capturing 4K video, the Sony UHS-I SDXC Memory Card (Class 10/U3) provides enhanced data transfer rates of up to 95 MB/s read and 90 MB/s write to make transferring large files quick and easy.
The SanDisk Extreme PRO UHS-I SDXC Memory Card (V30) delivers write speeds of up to 90 MB/s UHS Speed Class 3 (U3) recording speed for high resolution, real-world color and stutter-free 4K Ultra HD video.
Read more: Best Lenses for Sony a9.