Reference Manual

175
Movies
Choose Image Area
Choose the size of the area on the image sensor used to record
movies (the “movie crop”). The options are [FX] and [DX]. Select
[FX] to shoot movies in what is referred to as “FX-based movie
format”, [DX] to shoot in “DX-based movie format”. The
differences between the two formats are shown in the
illustration.
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When 3840 × 2160; 60p or 3840 × 2160; 50p is selected for
frame size/frame rate, image area is fixed at [FX]. The actual
crop, however, is approximately equivalent to 93% of that
when [FX] is selected at frame sizes of 3840 × 2160; 30p,
3840 × 2160; 25p, and 3840 × 2160; 24p.