At least since 1962 which was the 1st time I used it. Wikipedia dates it before that but I can go back no further.
The change from 200 to 400 was due to new standards in the definition, not to any change in the film. Older film speeds were biased to ensure plenty of light reached the film.
Just curious about the current formulation of this film. How far back does it go? I know Tri-x has been around for quite a while, but not a lot more.
Update - well, I found this link - its a start, but for a film thats been around so long, it's more of a summary - http://en.wikipedia.org/wiki/Kodak_Tri-X
I believe the orginal Tri-x (200 ASA) was introduced in 1954. Same year as the M3.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?