Auteur: Emmanuel Bigler
Date: 30-08-2005 18:04
Parlons plutôt en français et appelons-les Indices de Lumination (IL)
Plutôt qu'une formule mathématique, une petite table.
IL0 _ _1s f/1 _| 2s f/1,4 _ _ _ | _ _ 4s f/2 | 8s _ _f/2,8
_ _ _16s f/4 _| 32s f/5,6 _ _ _| _ _64s f/8 | 128s _f/11
_ _ 256s f/16 | 512s=8m30 f/22 | 17min f/32 | 34min f/64
table des IL : IL0 = 1s f/1
0 _| _1s f/1
1 _| _1s f/1,4 _ _| 1/2s f/1
2 _| _1s f/2 _ _ _| 1/2s f/1,4 _ _| 1/4s f/1
3 _| _1s f/2,8 _ _| 1/2s f/2 _ _ _| 1/4s f/1,4 _ _| 1/8s f/1
4 _| _1s f/4 _ _ _| 1/2s f/2,8 _ _| 1/4s f/2 _ _ _| 1/8s f/1,4 _ | 1/15s f/1
5 _| _1s f/5,6 _ _| 1/2s f/4 _ _ _| 1/4s f/2,8 _ _| 1/8s f/2 _ _ | 1/15s f/1,4
6 _| _1s f/8 _ _ _| 1/2s f/5,6 _ _| 1/4s f/4 _ _ _| 1/8s f/2,8 _ | 1/15s f/2
7 _| _1s f/11 _ _ | 1/2s f/8 _ _ _| 1/4s f/5,6 _ _| 1/8s f/4 _ _ | 1/15s f/2,8
8 _| _1s f/16 _ _ | 1/2s f/11 _ _ | 1/4s f/8 _ _ _| 1/8s f/5,6 _ | 1/15s f/4
9 _| _1s f/22 _ _ | 1/2s f/16 _ _ | 1/4s f/11 _ _ | 1/8s f/8 _ _ | 1/15s f/5,6
10 | _1s f/32 _ _ | 1/2s f/22 _ _ | 1/4s f/16 _ _ | 1/8s f/11 _ _| 1/15s f/8
11 | _ _ _ _ _ _ _| 1/2s f/32 _ _ | 1/4s f/22 _ _ | 1/8s f/16 _ _| 1/15s f/11
12 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/4s f/32 _ _ | 1/8s f/22 _ _| 1/15s f/16
13 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/8s f/32 _ _| 1/15s f/22
14 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/8s f/45 _ _| 1/15s f/32
15 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/8s f/64 _ _| 1/15s f/45
16 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/8s f/90 _ _| 1/15s f/64
17 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/8s f/128 _ | 1/15s f/90
_________________________________________________________________
4 _| 1/15s f/1
5 _| 1/15s f/1,4 _| 1/30s f/1
6 _| 1/15s f/2 _ _| 1/30s f/1,4 _ | 1/60s f/1
7 _| 1/15s f/2,8 _| 1/30s f/2 _ _ | 1/60s f/1,4 _ | 1/125s f/1
8 _| 1/15s f/4 _ _| 1/30s f/2,8 _ | 1/60s f/2 _ _ | 1/125s f/1,4 | 1/250s f/1
9 _| 1/15s f/5,6 _| 1/30s f/4 _ _ | 1/60s f/2,8 _ | 1/125s f/2 _ | 1/250s f/1,4
10 | 1/15s f/8 _ _| 1/30s f/5,6 _ | 1/60s f/4 _ _ | 1/125s f/2,8 | 1/250s f/2
11 | 1/15s f/11 _ | 1/30s f/8 _ _ | 1/60s f/5,6 _ | 1/125s f/4 _ | 1/250s f/2,8
12 | 1/15s f/16 _ | 1/30s f/11 _ _| 1/60s f/8 _ _ | 1/125s f/5,6 | 1/250s f/4
13 | 1/15s f/22 _ | 1/30s f/16 _ _| 1/60s f/11 _ _| 1/125s f/8 _ | 1/250s f/5,6
14 | 1/15s f/32 _ | 1/30s f/22 _ _| 1/60s f/16 _ _| 1/125s f/11 _| 1/250s f/8
15 | 1/15s f/45 _ | 1/30s f/32 _ _| 1/60s f/22 _ _| 1/125s f/16 _| 1/250s f/11
16 | 1/15s f/64 _ | 1/30s f/45 _ _| 1/60s f/32 _ _| 1/125s f/22 _| 1/250s f/16
17 | 1/15s f/90 _ | 1/30s f/64 _ _| 1/60s f/45 _ _| 1/125s f/32 _| 1/250s f/22
18 | 1/15s f/128 _| 1/30s f/90 _ _| 1/60s f/64 _ _| 1/125s f/45 _| 1/250s f/32
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7 _| 1/125s f/1
8 _| 1/125s f/1,4 | 1/250s f/1
9 _| 1/125s f/2 _ | 1/250s f/1,4 _| 1/500s f/1
10 | 1/125s f/2,8 | 1/250s f/2 _ _| 1/500s f/1,4 _| 1/1000s f/1
11 | 1/125s f/4 _ | 1/250s f/2,8 _| 1/500s f/2 _ _| 1/1000s f/1,4
12 | 1/125s f/5,6 | 1/250s f/4 _ _| 1/500s f/2,8 _| 1/1000s f/2
13 | 1/125s f/8 _ | 1/250s f/5,6 _| 1/500s f/4 _ _| 1/1000s f/2,8
14 | 1/125s f/11 _| 1/250s f/8 _ _| 1/500s f/5,6 _| 1/1000s f/4
15 | 1/125s f/16 _| 1/250s f/11 _ | 1/500s f/8 _ _| 1/1000s f/5,6
16 | 1/125s f/22 _| 1/250s f/16 _ | 1/500s f/11 _ | 1/1000s f/8
17 | 1/125s f/32 _| 1/250s f/22 _ | 1/500s f/16 _ | 1/1000s f/11
18 | 1/125s f/45 _| 1/250s f/32 _ | 1/500s f/22 _ | 1/1000s f/16
19 | 1/125s f/64 _| 1/250 f/45 _ _| 1/500s f/32 _ | 1/1000s f/22
20 | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _| 1/1000s f/32
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