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English: table
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Conversion Table for Speed Numbers
B.S.I. Log Exposure Index A.S.A. & B.S.I. Exposure Index H. & D. British D.I.N. American Scheiner Weston G.E.C. European Scheiner
10° 0.8 25 1/10 0.5 11°
11° 1.0 31 2/10 0.62 1 12°
12° 1.2 37 3/10 0.75 1.5 13°
13° 1.6 50 4/10 1 2 14°
14° 2.0 62 5/10 1.25 15°
15° 2.5 78 6/10 10° 1.5 3 16°
16° 3 100 7/10 11° 2 4 17°
17° 4 125 8/10 12° 2.5 5 18°
18° 5 150 9/10 13° 3 6 19°
19° 6 200 10/10 14° 4 8 20°
20° 8 250 11/10 15° 5 10 21°
21° 10 300 12/10 16° 6 12 22°
22° 12 400 13/10 17° 8 16 23°
23° 16 500 14/10 18° 10 20 24°
24° 20 600 15/10 19° 12 24 25°
25° 25 800 16/10 20° 16 32 26°
26° 32 1000 17/10 21° 20 40 27°
27° 40 1200 18/10 22° 24 48 28°
28° 50 1600 19/10 23° 32 64 29°
29° 64 2000 20/10 24° 40 80 30°
30° 80 2400 21/10 25° 48 100 31°
31° 100 3200 22/10 26° 64 125 32°
32° 125 4000 23/10 27° 80 150 33°
33° 160 4800 24/10 28° 96 200 34°
34° 200 6400 25/10 29° 128 250 35°
35° 250 8000 26/10 30° 160 300 36°
36° 300 9600 27/10 31° 200 400 37°
37° 400 12800 28/10 32° 250 500 38°
38° 500 16000 29/10 33° 300 600 39°
39° 600 20000 30/10 34° 400 800 40°
40° 700 25000 31/10 35° 500 900 41°
41° 1000 30000 32/10 36° 600 1000 42°

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for a ... copyright has expired if ... pursuant to ...
published edition of a work or works
  • it was first published before 10 April 1987; or
  • if it was published on or after 10 April 1987, 25 years have passed since the end of the calendar year in which it was first published (that is, before or in 1998)
section 96
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