photowiki:iso

Before ISO, there is many other film speed system

ISO cam 2009- ASA (1960-1987) DIN (1961-2002) GOST (1951-1986) apex (1960)
25 25 15 22 3
32 32 16 32
50 50 18 45 4
64 64 19 65
100 100 21 90 5
200 200 24 180 6
400 400 27 350 7
800 800 30 700 8
1600 1600 33 1400 9
3200 3200 36 2800 10
6400 6400 39 5600 11
12500 12800 12500 12
25000 25600 13
50000 51200 14
100000 102400 15
200000 204800 16
400000 409600 17
  • photowiki/iso.txt
  • Last modified: 2023/02/18 17:21
  • by ying