I bought a mamiya 6 with the 75mm lens from KEH rated EX. I took it out to shoot today (outside) and i noticed that when i took a picture and the shutter clicked it would take up to 10seconds for the second click to happen to allow the film winder to advance. It doesn't do this when there is no film in the camera and the back is open, then the second click happens within a second and you can advance the winder. I shot another roll inside and the second click happend a lot faster than this afternoon outside in the cold. I'm wondering if i should return the camera or if this is normal or what. Has anyone else encountered this problem? or is it a problem at all? I've heard that the winding mechanisms are faulty and i don't want to get stuck with a broken camera after spending a ton of money. thanks.