Nikon D7500 - The Movie Crop

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The Movie Crop
Movies have an aspect ratio of 16 : 9 and are recorded using a
crop that varies with the frame size and the option selected for
Choose image area in the movie shooting menu (0 188, 257).
Movie crop sizes are given below:
• At a frame size of 3840 × 2160, the movie crop is approximately
16.2 × 9.1 mm, regardless of the option selected for Choose
image area. The apparent focal length is approximately 1.5×
greater than that for DX format.
• With DX selected for Choose image area and a frame size of
1920 × 1080 or 1280 × 720, the movie crop is approximately
23.5 × 13.3 mm.
• With 1.3× selected for Choose image area and a frame size of
1920 × 1080 or 1280 × 720, the movie crop is approximately
18.0 × 10.1 mm. The apparent focal length is approximately
1.3× greater than that for DX format.
1920 × 1080 and
1280 × 720 (DX)
1920 × 1080 and
1280 × 720 (1.3×)
3840 × 2160