Talk:Film speed

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marketing anomalies

In the case of black and white films, the ISO standard specifies development for specified contrast levels. In the case of color films, like C41 and E6, the times are fixed. Films like the Ektachrome P800/1600 might not actually be pushed in the technical sense, as they are developed for the appropriate time for that film, which happens to be longer than the process-specified time. For Delta 3200, the characteristic curve has an unusual shape, such that the ISO standard doesn't work as well. There is no straight line section in the Delta 3200 curve.^[1] Gah4 (talk) 18:34, 29 October 2018 (UTC)[reply]

References

^ "Technical information Delta 3200 professional". www.ilfordphoto.com. Ilford Photo. Retrieved 29 October 2018.

Missing Interwiki Links

These links are missing: da:ISO (filmfølsomhed), fr:Sensibilité ISO, ja:ISO感度, sv:ISO-grader. --2A02:810A:86C0:6590:88F1:C654:218E:9873 (talk) 17:21, 21 May 2020 (UTC)[reply]

ASA: 1943 vs. 1960

I think the ASA section needs a conversion table for ASA 1942 vs. ASA 1960, to make the change more transparent, complete with a third column for modern ISO, to show easily how ISO is still identical to ASA 1960 in values. --2003:DA:CF39:B861:60FA:97C4:BA2C:67AC (talk) 23:15, 25 July 2023 (UTC)[reply]

Intermediate speeds for odd films?

Polaroid Type 107/667 were specified as 3000-speed films, not 3200; does this need to be reflected in the table? Okto8 (talk) 17:06, 5 April 2024 (UTC)[reply]

Why does this article not state what ISO stands for?

Just bizarre - what do the letters even stand for, and how can such a long article not even mention it? Any other article would state what each letter stands for in the introductory paragraph. 🤷 49.199.81.24 (talk) 49.199.81.24 (talk) 08:37, 14 August 2024 (UTC)[reply]

In the section Film speed#Current system: ISO, it states "The current International Standard for measuring the speed of color negative film is ISO 5800:2001[19] (first published in 1979, revised in November 1987) from the International Organization for Standardization (ISO)." That is, ISO = International Organization for Standardization, and the standard is ISO 5800:2001. Mind matrix 14:09, 14 August 2024 (UTC)[reply]

[delta3200-1] "Technical information Delta 3200 professional". www.ilfordphoto.com. Ilford Photo. Retrieved 29 October 2018.

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