The SMC M42 lenses are all excellent. I have a 28, 50, 105 and 135 left over from my film days and on Friday night I picked up an SMC 200 f/4 for $40 from a little antique shop I go to from time to time. It's a little beat up but I think it will take pretty nice pictures. I haven't used it much because we've had steady, heavy rain all weekend but I did take this one the night I picked it up just as a tryout. It was dusk and the lights of the gas station were the only things I could find to shoot. K10D, handheld, 1/80 @ f/5.6, oh, and no PP on this other than resize for web...