Zoe, I started using this film a couple of years ago and it's become one of my favorites! I can't say I've done extensive testing, but the following information works well for me. I shoot it at ASA 40 and I develop it in D76 1:1 68 degrees for 8 minutes. I shoot 120 film getting 6x7 negatives and I can make very large and very sharp prints! Good luck!(posted 9258 days ago)Bob