Exposure Calculator
EV v2.0
f/5.6
f/1.0
f/2.8
f/5.6
f/11
f/22
1/125
1/4000
1/250
1/60
1/8
1″
ISO 400
100
200
400
800
1600
3200
Exposure Value
+0.0
−6
0
+6
+12
+18
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EV Contribution
Aperture
+2.3
Shutter
−1.2
ISO
+4.0
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Formula
EV = log₂(N² / t) − log₂(ISO / 100)
N = f‑number | t = shutter time (s)
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Quick Guide
- 1 Set aperture for depth of field
- 2 Adjust shutter speed for motion
- 3 Increase ISO for low light
- 4 Read EV and meter guidance