Sony FDR-AX55 Manual page 139

You can select the frame rate to be used to record XAVC S 4K movies, XAVC S HD movies
or AVCHD movies. Set [
1. - [Image Quality/ Size] - [
Available frame rate settings vary depending on the recording format. See the
following.
Available frame rate settings
XAVC S 4K:
30p(*)/25p(**)
24p(*)
XAVC S HD:
60p(*)/50p(**)
30p(*)/25p(**)
24p(*)
AVCHD：
60i(*)/50i(**)
60p(*)/50p(**)
24p(*)/25p(**)
Descriptions of menu items
60i(*)/50i(**):
This is an ordinary setting for recording AVCHD movies.
60p(*)/50p(**):
You can record movies with a data volume twice that of 60i(*) or 50i(**)/30p(*) or 25p(**) per
unit time. When you play a movie recorded with this setting on a TV, the TV must be
compatible with 60p(*) or 50p(**) movie playback and you have to set [HDMI Resolution] to
1080p.
30p(*):
It is recommended that you use a tripod when recording movies with this setting.
24p(*)/25p(**):
You can record movies which provide an atmosphere closer to that of film images with this
setting. It is recommended that you record movies with this setting using a tripod.
*
1080 60i-compatible device
**
1080 50i-compatible device
Note
Frame Rate] first, before setting [
Frame Rate] - desired setting.
REC Mode].