Geoffry Crawley's tests in the BJP show the new Delta 400 to be a significant improvement. Maybe 1/2 stop faster and pushes much better. The overall conclusion is that it gives HP5+ a run for it's money, unlike the current film which is slower then HP5+ and doesn't push as well.(posted 8565 days ago)I still like HP5+. I had a roll on which I'd shot 1/2 at EI 400 and 1/2 at EI 1600. I didn't have time to split the roll so I processed it in Microphen with a 1 stop push for EI 800. The negatives shot at 400 and 1600 were all quite printable and I was quite pleased with the results.