What ISO would be German Scheiner 19 degrees?

[Bill Mitchell]

Readling a book by Dr. Paul Wolff written in the mid-1930s.

 

[ZorkiKat]

Readling a book by Dr. Paul Wolff written in the mid-1930s.

From a table found in No.2\1954 Leica Fotografie: 19 Scheiner=16 ASA. More or less equivalent to ISO 16 since 1950s ASA is slightly different.

Jay

 

[Marc .]

19 European Scheiner = 9 Din = 5 ASA
19 American Scheiner = 15 Din = 20 ASA
from a table in web page in german on sensitometry :
Dead Link Removed

Marc

 

[Bill Mitchell]

19 European Scheiner = 9 Din = 5 ASA


Marc

Thank you. No wonder I've been having such a tough time pinning it down.

 

[Helen B]

Rudolf Kingslake's approximate guidelines:

ISO/ASA = antilog ((Scheiner-9)/10)

DIN = Scheiner - 8

Scheiner = about 7 x log (H&D)

Best,
Helen