Kodak 400 Tri-X - 36expOne Roll of Iconic Grit and Contrast. Kodak Tri X 400 is the stuff of legends. With its distinctive grain, rich blacks, and punchy contrast, this film has been a favorite of street photographers, journalists, and artists for decades. Its ISO 400 rating gives it flexibility across a wide range of lighting conditions, while still delivering that unmistakable, gritty Tri X look. Its raw, its classic, its beautifuljust load it up and shoot history.