Just received my Panny 25mm and I'm surprised how loud it is on my GH2. OK I just own 3 m43 lenses 45mm,14-140mm,25mm so I can compare only those. 45mm 1.8 is almost dead silent and very fast, 14-140 is also quiet but slower however 25mm is noisy and significantly slower than 45mm. I don't talk about rattlesnake but sounds when AFS single is enabled and focusing on close objects. It's not noisy but definately audible so my question is : normal or not ? can you compare AF speed 45mm vs 25mm ? If needed I can take some video examples.