Exposure value & equivalents

Compute EV for an aperture/shutter/ISO combo, then solve the equivalent shutter for a different f-stop or ISO.

Calculated in this browser. Nothing is sent anywhere.

f/0.5–128, shutter 1/32000 s–3600 s, ISO 3–409600. Reciprocity failure and ND effects are not modeled.

How to use

  1. Enter aperture, shutter, and ISO.
  2. Read the EV.
  3. Optionally change aperture or ISO to get an equivalent shutter time.

What it supports

Standard EV math at ISO 100 reference, aperture f/0.5–f/128, shutter 1/32000 s–3600 s, ISO 3–409600. Reciprocity failure on long exposures is not modeled.

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