The details: 500 C/M hasselblad with the Carl Zeiss Planar 80mm 2.8 t* lens. This question has more to do with the lens than anything. When I first got my hands on the lens everything was working grand. However, currently the aperture ring will not go below 5.6, it feels as though there is something preventing the ring from turning. The actual blades will still go to wide open after each shot allowing for a clear view through the viewfinder, but once I press the lever to set the aperture it goes to whatever fstop I am at. So am I right in assuming that somehow something found its way into the lens and is preventing me from going wider that 5.6?