Hallo, I need some technical advice with regards to a Pentax K1000 camera that has mysteriously 'frozen' up as the lens was closing. I took a picture at f/16 with a SMC 3.5 28mm lens. Suddenly - nothing. I can see looking into the lens a small opening with the shutters stuck around it. I assume that because the camera is so well know that somebody has experienced this before. I bought the camera and lens second hand off the net but this is the first time I have ever had a problem. It refuses to respond. I would be grateful for any suggestions as to causes or what I may do to fix it. Appreciate any help. Mel.