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Calculate Exposure | Exif Viewer | Photo Dimensions | Photo Ratio | Image Diagonal
Calculate Photographic Exposure
A tool to calculate the camera settings for exposure. Enter three values, the forth will be calculated. Aperture, ISO / ASA and exposure time can be set at the camera. EV means exposure value. Different lighting conditions require different EVs, the brighter, the higher is this value. A table with conditions and their approximate EVs is below the calculator. You can enter time at h, m, s as hour, minutes, seconds and then press ← to convert into seconds.
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| Lighting condition | EV | |
|---|---|---|
| Full sunlight, snow | 16 | |
| Full sunlight | 14 – 15 | |
| Cloudy | 13 | |
| Thick clouds | 12 | |
| Sunrise / sunset | 12 | |
| Dusk / dawn | 5 – 11 | |
| Night, bright street | 7 – 8 | |
| Inside buildings, artificial light | 5 – 8 | |
| Night, near lighted buildings | 5 | |
| Night, distant lighted buildings | 2 – 3 | |
| Night, dark landscape at full moon | -2 | |
| Night, dark landscape at half moon | -4 | |
| Night, dark landscape at new moon | -6 – -8 | |
| Night, stars | -3 – -9 | |
| Night, weak celestial bodies, nebulae | -10 and below |
The formula for this calculation is:
EV = log2 ( 100 * aperture² / ( ISO * time ) )
Example: the Milky Way in Cygnus. F-number 3.5, ISO 400, exposure time 1176 s, calculated EV -8.6.
Large image at the Observatory Kempten.
German: Fotografische Belichtung berechnen, Exif-Daten auslesen, Bildformat, Bildverhältnis, Bilddiagonale
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