3200 Delta Professional allows photographers to take pictures under difficult conditions including fast action and poor lighting. With a measured speed of up to ISO 1250 (up to ISO 1600 when processed in Ilford Microphen developer) the film has been designed to be 'push' processed to achieve its nominal speed of EI 3200. It may be further 'pushed' to EI 12,500 with a change of developer, or 'pulled' to provide results equivalent to the best ISO 400 films.