Especially useful for dimly lighted subjects, fast action, extending the distance range, and flash pictures. Used in scientific and biomedical work, especially where fluorescence photography is required. Features high speed (El 400), very high sharpness, extremely fine grain, high resolving power. High degree of enlargement and shorter push-processing development time and total darkness. Recommended Kodak Developers: T-Max, D-76, HR-110, Microdol-X.