I'm basically with Henry on the speed issue. Both Delta films are quite true to their indicated speeds. I prefer to rate both films a third stop over and develop a little less. This allows for a little safety and improves overall shadow detail slightly, also, less developing reduces grain and maximizes resolution of fine detail. However, with a bit more development, both films will deliver full speed. They are consistent in their rated speeds: Delta 400 is two stops faster than 100.(posted 8160 days ago)