- Jan 22, 2009
I used a sensitometer to expose the film and a densitometer to read the subsequent densities, then plotted the H&D curve and calculated the speed based on ISO methods. I have other videos covering which model of sensitometer and densitometer I used. Since I have a Master’s degree in photography, I know how to find film speed.
No one with knowledge here is doubting your qualification and your results. And I say thank you that you have published it on youtube, as lots of other youtubers - especially the young ones - unfortunately don't have the qualification to do real film tests with evalutions of the characteristic curve.
There are lots of so called "tests" of P30 online on youtube and on the hipster film pages, which just copy the marketing messages of Film Ferrania, claiming that this film is an ISO 80 speed film.
But as you, Adrian Bacon, me and all the other who have done real tests with a densitometre know, that is simply not true. This film has 2-3 stops less speed in reality. And its huge contrast and problematic curve shape make good quality prints very difficult. And for all these problems you pay a very high price.
I really wish Film Ferrania will do better in the future. I had supported their Kickstarter project, and I wish them well for the future.