The Film Photography Project has an article on low ISO film. What is low ISO film and why would one shoot it? FPP defines a low ISO film as one rated (even if experimentally) as ISO 6 or less. Properly, if the film speed is not determined by ISO methods, the rating should be called an Exposure Index or EI number, but hey, it is FPP calling the shots in the article.
So, why would one shoot low ISO film? For the magical effects, cites FPP. Work with the material, discover its abilities and be creative with what is captured. Low ISO films tend to require long exposures, can have interesting colour response and may have super fine grain.
Where can you get these films? Well, FPP has a store of course, which has stocks a number of these emulsions:
* KODAK 2254 LOW ISO COLOR
* KODAK 2238 PANCHROMATIC BW FILM
* KODAK 2366 BLUE SENSITIVE BW FILM
and more! See the article for details.
