You can shoot XP-2 from EI 50-800 with normal processing, on the same roll. Grain increases at 800, sharpness and contrast decrease at 50. A good lab, even with automated processing will push C41 for you. If your lab say they won't, keep looking. XP-2 doesn't push well but a 1 stop push does help at EI 1600, IMHO.(posted 8559 days ago)