Tri-X 400 is a black-and-white film produced by Kodak, known for its high speed and versatility. With an ISO rating of 400, it performs well in various lighting conditions, making it a popular choice among photographers for both indoor and outdoor settings. This film is celebrated for its fine grain and rich tonal range, allowing for detailed images with deep blacks and bright whites. Tri-X 400 has been a staple in the photography community since its introduction in the 1950s, often used for street photography, portraits, and documentary work.