so hubby buys me the canon 50 mm 1.4 lens i wanted :heart: but i place it on my digital rebel and get err 99! i checked the manual, and err 99 is the generic i-have-no-clue-eject-and-reinsert battery. i do that and am able to get the lens to respond, but the AF is bizarre and doesn't want to cooperate. i finally am able to get some focus, snap a shot, and bam, err 99 :banghead: every few shots this happens... what is going on? is it the lens? my camera? the connection of the two? i place another lens on and all is well, so there's something strange going on... what to try? do i return this asap?