EV Difference Calculator

Use this page to calculate the exposure difference in stops/EVs between two images by inputting the shutter speed, aperture, ISO and ND filter reduction (if any).

Shutter Speed is in seconds, and supports fractions. E.g.
```
1/4000
```
for 1/4000th of a second, or
```
30
```
for 30 seconds.
Aperture should be without the "F/". E.g.
```
8
```
for F/8, or
```
2.2
```
for F/2.2.
ISO is as you'd expect. If left blank, will default to
```
100
```
.
In the Filter box, type the number of EVs/stops that your filter darkens an image. E.g. for a 3-stop filter (AKA "ND8") type
```
3
```
, or a 12-stop filter (AKA "ND4096") type
```
12
```
. If no filter was used, leave it blank or type
```
0
```
.

EV Difference Calculator

Image A:

Image B:

Fill in the fields above, the result will be shown here.