Zone System Calculator

Ansel Adams Zone System · Select a zone, align your spot meter EV reading

Zone
EV
↕ drag or scroll EV scale
Zone V
Metered EV 12.0
Adjusted EV 12.0
±0
stops — expose as metered
Subject renders as Zone V (middle gray)
Aperture · Shutter Combinations
Exact full-stop aperture match  ·  "Exact Shutter" column = calculated value before rounding to standard