 
 <prompt> Wetin be di highest ISO wey dem mention? Based on di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Some high-speed black-and-white films, like Ilford Delta 3200 and Kodak T-MAX P3200, dey sell with film speeds wey pass their true ISO speed as dem test am. For example, Ilford product na actually ISO 1000 film, according to their data sheet. The manufacturers no dey show say the 3200 number na ISO rating for their packaging. Kodak and Fuji also dey sell E6 films wey dem design for pushing, like Ektachrome P800/1600 and Fujichrome P1600, wey both get base speed of ISO 400. 