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Technical Solutions | D850 TIPS

Slow-Motion Movies

To record silent slow-motion movies, select 1920 × 1080; 30p ×4 (slow-mo), 1920 × 1080; 25p ×4 (slow-mo), or 1920 × 1080; 24p ×5 (slow-mo) for Frame size/frame rate (see this section). Slow-motion movies are recorded at 4 or 5 times the rated speed and play back at the rated speed. Movies shot at 1920 × 1080; 30p ×4 (slow-mo), for example, are recorded at a frame rate of roughly 120 fps and play back at around 30 fps, meaning that 10 seconds recording produces about 40 seconds of footage.

Recording and playback speeds are shown below.

Frame size/frame rate Recording speed Playback speed
1920 × 1080; 30p ×4 (slow-mo) 120p (119.88 fps) 30p (29.97 fps)
1920 × 1080; 25p ×4 (slow-mo) 100p (100 fps) 25p (25 fps)
1920 × 1080; 24p ×5 (slow-mo) 120p (119.88 fps) 24p (23.976 fps)

Slow-Motion Movies

When a slow-motion option is selected, quality is fixed at “normal” and the image area is fixed at DX, regardless of the lens used or the option selected for Image area > Choose image area in the movie shooting menu (see this section). Movies shot with face-priority AF, pinpoint AF, or subject-tracking AF selected for AF-area mode are recorded using wide-area AF.