AgfaPhoto s APX 400 Professional Black and White Negative Film is a high speed black and white film for producing prints using a traditional black and white printing process. The film exhibits a high nominal sensitivity of ISO 400 27° and can effectively be pushed to ISO 1600 33° for use in low-light conditions and with fast-moving subjects. Standard development in black and white chemistry yields a fine grain texture with high resolution and tonal latitude. The film also responds to push and pull development; however testing is recommended prior to shooting.