Exposure Calculator

Shutter speed from the shutter angle rule, and the ND filter needed to keep your desired aperture.

Shutter angle → speed

FPS

Shutter angle

Shutter speed

1/50 s

Required ND filter

Metered aperture without ND (f/)

Desired aperture (f/)

Stops of ND needed

5.0 stops

Suggested: ND32 (5 stops)

180° rule: speed = 1 / (2 × fps). Adjust the angle for looks with more or less motion blur.