Ok, I tested it on both of my cameras, on the K10D, it will go down to F2.8, on my K110D, it will only go down to F4. What is strange, is that on my K10D, even at 70mm, it will still SAY it is on F2.8, but at that focal length, F4 is the widest stop. So, it is apparently screwed up on both cameras, lol....I am guessing it is because it is an "old" style push pull zoom, with just one contact. Actually, it isn't a bad lens, fairly sharp, and well built.
Here are a few shots I took with it with some extension tubes that were thrown in with the lens when I bought it. Not brilliant photography, but will give you an idea of the IQ of the lens.
Last edited by Stratman; 11-24-2009 at 06:43 PM.