ND filter calculator

New shutter speed with an ND filter — enter the base exposure and the filter strength in stops or ND number.

Common filters

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Shutter 1/32000 s–24 h, 0–20 stops, output capped at 7 days. Aperture and ISO are unchanged — this only stretches the shutter. ND ratings follow the common density convention (ND1000 ≈ 10 stops); some makers round differently, so prefer explicit stops when precision matters.

How to use

  1. Enter the shutter speed without the filter.
  2. Pick the ND strength (stops or ND rating).
  3. Read the new shutter time.

What it supports

Shutter 1/32000 s–24 h, 0–20 stops, output capped at 7 days. Aperture and ISO are untouched. ND numbers follow the common density convention (ND1000 ≈ 10 stops) — makers round differently, so use stops when precision matters.

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