Best Memory Card for Sony a9
The Sony Alpha a9 is Sony’s flagship full frame mirrorless camera released in 2017. Sony a9 has a 24.2MP full-frame Exmor RS stacked CMOS sensor and BIONZ X image processor, capable of shooting at up to 20 fps, recording UHD 4K video internally, and shooting with an expanded sensitivity range to ISO 204,800. Sony a9 has two SD card slots, one support UHS-II SD memory cards, the other only support UHS-I SD memory cards. Here are recommended SD cards for Sony a9:
Recommended UHS-II SD memory cards for Sony a9:
To max use of Sony a9, you’d better use UHS-II SD memory cards. One of the Sony a9’s SD card slots is support UHS-II memory cards. Currently the fastest & toughest UHS-II SD memory card is Sony’s best selling SF-G UHS-II Tough SD card, this card has fastest read speed at 300 MB/s & write speed at 299 MB/s, the best UHS-II SD memory card for Sony a9. You can take a look at list below:
| Card | Max. Read Speed | Max. Write Speed | Check Price |
| Sony SF-G Tough UHS-II SDXC | 300 MB/s | 299 MB/s | B&H/Adorama/Amazon |
| Sony SF-G UHS-II SDXC | 300 MB/s | 299 MB/s | Amazon/B&H/Adorama |
| Lexar Professional 2000x UHS-II SDXC | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| SanDisk Extreme PRO UHS-II SDXC | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| Hoodman Steel 2000x SDXC UHS-II | 300 MB/s | 260 MB/s | B&H/Adorama |
| Angelbird AV Pro UHS-II SDXC | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| Delkin Devices Cinema SDXC UHS-II | 280 MB/s | 250 MB/s | Amazon/B&H/Adorama |
| Sony M Series UHS-II SDXC | 260 MB/s | 100 MB/s | B&H/Adorama |
| Lexar Professional 1000x UHS-II SDXC | 150 MB/s | 75 MB/s | Amazon/B&H/Adorama |
Recommended UHS-I SD memory cards for Sony a9:
The other SD card slot support UHS-I SD memory card. UHS-I SD memory cards are usually much cheaper than UHS-II cards. Currently the fastest UHS-I SD memory cards are from SanDisk (Max Read Speed at 170 MB/s) and Sony, both has max. write speed at 90 MB/s. Take a look at recommended UHS-I SD memory cards for Sony a9:
| Card | Max. Read Speed | Max. Write Speed | Check Price |
| SanDisk Extreme PRO UHS-I SDXC | 170 MB/s | 90 MB/s | Amazon/B&H/Adorama |
| Sony UHS-I SDXC | 95 MB/s | 90 MB/s | Amazon/B&H/Adorama |
| Delkin Devices Elite UHS-I SDHC | 95 MB/s | 80 MB/s | Amazon/B&H/Adorama |
| Sony High Speed UHS-I SDXC | 90 MB/s | 70 MB/s | Amazon/B&H/Adorama |
| Transcend UHS-1 SDXC | 95 MB/s | 60 MB/s | Amazon/B&H/Adorama |