La règle de f/16
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Pour une sensibilité de 100 ISO et une ouverture de f/16, il faut une vitesse de 1/125 pour obtenir une exposition correcte par temps ensoleillé (IL=15).
De même qu’a 200 ISO, l’exposition sera de 1/250 seconde pour une ouverture de f/16.
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Indice de lumination IL
| Scène | Nuit noire | Pleine lune | Ville la nuit | Église | Intérieur d’une maison | Las Vegas la nuit | Temps nuageux | Coucher de soleil | Ciel Voilé | Grand soleil | Grand soleil à la mer / à la neige |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Luminosité IL | -15 | -3 | 3 | 5 | 7 | 8 | 10 | 11 | 13 | 15 | 16 |
Correspondance IL et couples vitesse/diaphragme
Tableau de correspondance IL et couples vitesse/diaphragme pour 100 ISO.
-38s15s30sec60sec2min4min8min16min32min1h2h4h-24s8s15sec30sec60sec2min4min8min16min32min1h2h-12s4s8sec15sec30sec60sec2min4min8min16min32min1h01s2s4sec8sec15sec30sec60sec2min4min8min16min32min11/21s2sec4sec8sec15sec30sec60sec2min4min8min16min21/41/21sec2sec4sec8sec15sec30sec60sec2min4min8min31/81/41/21sec2sec4sec8sec15sec30sec60sec2min4min41/151/81/41/21sec2sec4sec8sec15sec30sec60sec2min51/301/151/81/41/21sec2sec4sec8sec15sec30sec60sec61/601/301/151/81/41/21sec2sec4sec8sec15sec30sec71/1251/601/301/151/81/41/21sec2sec4sec8sec15sec81/2501/1251/601/301/151/81/41/21sec2sec4sec8sec91/5001/2501/1251/601/301/151/81/41/21sec2sec4sec101/10001/5001/2501/1251/601/301/151/81/41/21sec2sec111/20001/10001/5001/2501/1251/601/301/151/81/41/21sec121/40001/20001/10001/5001/2501/1251/601/301/151/81/41/2131/80001/40001/20001/10001/5001/2501/1251/601/301/151/81/414 1/80001/40001/20001/10001/5001/2501/1251/601/301/151/815 1/80001/40001/20001/10001/5001/2501/1251/601/301/1516 1/80001/40001/20001/10001/5001/2501/1251/601/3017 1/80001/40001/20001/10001/5001/2501/1251/6018 1/80001/40001/20001/10001/5001/2501/12519 1/80001/40001/20001/10001/5001/25020 1/80001/40001/20001/10001/50021 1/80001/40001/20001/1000
| IL | Ouverture de diaphragme | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| f/1 | f/1,4 | f/2 | f/2,8 | f/4 | f/5,6 | f/8 | f/11 | f/16 | f/22 | f/32 | f/45 | |
| -660s2min4min8min16min32min1h2h4h8h16h32h | ||||||||||||
| -530s60s2min4min8min16min32min1h2h4h8h16h | ||||||||||||
| -415s30s60sec2min4min8min16min32min1h2h4h8h | ||||||||||||
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