Jorge, I believe that you were conversing with the other "Michael". However, since you asked, I have noticed that Delta 100 is considerably faster than TMX when shooting near my home in Colorado. This may be due in part to the reduced blue sensitivity of TMX, which is designed to give more realistic renditions of the sky, etc. Since Colorado has much more blue light than most other locations, the same speed difference may not be observed (or measured) by others.(posted 8424 days ago)