Sony a7 III Video Recording Limits
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|Normal Frame Rates (59.94 fps or less)||29 minutes1|
|High Frame Rates (S&Q Mode)||29 minutes of playback2|
1 Duration is approximate and is a product specification limit.
2 Duration is for final playback time only, not for recording time. For example, recording will automatically stop when the recorded file reaches approximately 15 minutes if the S&Q Record Setting is set set to 60p/50p and S&Q Frame Rate is set to 30fps/25fps.
- Using SD/SDHC cards:
- The card will be formatted in FAT32.
- If the file size exceeds 4 GB, a new file will be created automatically.
- Using SDXC cards:
- The card will be formatted in exFAT.
- Even if the file size exceeds 4 GB during recording, the movie will be saved as a single file.
- If the file size exceeds 2 GB while recording in AVCHD mode, recording will continue and a new file will be created automatically.
- XAVC S movies cannot be recorded simultaneously when using a combination of cards with different file systems (example: Card 1 with the exFAT file system and Card 2 with the FAT32 file system).
- An increase of the camera’s internal temperature may cause recording to stop before the maximum recording time is reached.
- The Sony a7 III records video in a variable bitrate, which automatically adjusts image quality depending on the shooting scene. Therefore, recording times will vary depending on the content you are shooting and the shooting conditions.
Source: Sony a7 III (ILCE-7M3 / ILCE-7M3K) Owner’s Manual (English) - pages 85-89