I got a k100D a few weeks back and have been having a blast with it. I decided to try my telephoto lens tonight to get some shots of the moon, and when I put it on it just blinks Av-- and wont take any pics. I read the manual and I don't see anything there to help. (I tried it in AV mode first, then all others, no luck) Any clue? also I know the lens is good because its off of my pentax 35mm camera. also if this isnt in the right location feel free to move it mods!!