It's an f/2.8 D and man is it built well. Looks like the original owner hardly ever used it if ever. I know there are better lenses but my pocketbook can only stand so much. As many of you know, I'm new to the DSLR world. This gives me a 20-35 zoom and a 35-70 zoom both f/2.8. Maybe someday I'll get an 80-200 zoom. I'm not real crazy about changing lenses on a digital camera. What do you think about this combo? I understand the 20 is really almost a 35 in film camera terms.