Hi everyone! Just looking for some help here. I just got my new 45mm 1.8 lens and am very pleased with it so far except for one issue. I don't know if this is standard or if I have a bad copy of the lens, but is it normal to sometimes hear and see the lens blades opening and closing while shooting? I thought MSC meant the lens would be silent. I have two other Oly lenses (12-50mm and 40-150mm) and haven't had this happen with either of them. I know I've heard my Pana 20mm 1.7 make a slight chattering noise, but nothing like what I've heard/seen from the 45. Normal or bad copy? Here's a photo of what I saw when the lens was making the chattering noises.