I bought a Pentax K1000 a little over a month ago. All the controls seem to work properly, but I think there's a problem with my light meter. When I set the camera to ISO 100 and the shutter speed to B, the meter needle tends to go all the way up to the "+" side of the scale, which is as it should be. However, the needle moves at certain shutter speeds, but stands stock still at others. The same thing happens when I use the aperture ring. Another thing that bugs me is that when I manage to get the needle centered, cocking the rapid wind lever and/or pressing the shutter button causes the needle to move off-center. I've tried cleaning the batter cover and contact points as well as the battery itself. I've even switched out the batteries and still get the same problem. I've heard the Pentax K1000's light meter is slow to respond, but I don't think that is the problem I'm having here. Can someone help me out?