How do I enter 1/48 second?

Divide 1 by 48 to get 0.020833… and enter that decimal in the Exposure time field.

Photo & Video

Shutter Angle

Shutter angle from FPS and exposure time

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FPS

Exposure time

Enter exposure time in seconds (1/48 ≈ 0.0208).

Converts frame rate and shutter speed into shutter angle — the standard way film and cinema cameras describe motion blur.

Who it's for: Cinematographers, video editors matching film look, and camera assistants dialing in the 180-degree rule.

Computes shutter angle = exposure time (seconds) × FPS × 360°.

The classic cinema look is 180° at 24 fps with 1/48 s exposure.

Exposure time must be entered in seconds, not as a fraction.

Enter FPS — your project frame rate (24 for film, 23.976 for NTSC film, 30 for broadcast).
Set Exposure time in seconds: 1/48 ≈ 0.0208, 1/50 = 0.02, 1/60 ≈ 0.0167.
Read Shutter angle in degrees — 180° is the traditional motion blur target.

Smaller angles (e.g., 90°) produce crisper motion; larger angles add more blur.
When shooting at 24 fps, set shutter speed to 1/48 s (or 1/50 s in PAL regions) for the 180° rule.
Some cameras display shutter angle directly — use this tool to verify or convert from shutter speed.

How do I enter 1/48 second?: Divide 1 by 48 to get 0.020833… and enter that decimal in the Exposure time field.