Just got a Voigtlander vito b off craigslist. it is a beautiful camera, got it dirt cheap. I think there might be a problem with it though. When i turn the focus ring it seems like the whole lens moves. so i held the shutter on "B" and sure enough the whole lens including the retaining ring is moving. anyone know how I can fix this. Also, shutter sticks at 1/10 and slower.