Here is my question, when mounted on my E-PL1 the 17mm acts normally but when mounted on the E-P2 it behaves strangely when pointed from a bright to a low light scene. Here are the details, if the camera is moved quickly from a bright to dark scene (such as from a bright window to a dark corner) the aperture of the lens will audibly click and the LCD display will freeze for a fraction of a second. This does not happen with the 14-42mm nor does it happen with the E-PL1 with either lens (14-42 or the 17). It seems that when the lens changes aperture to adjust to extreme changes in brightness, the camera freezes for that very brief moment. I tried hard to repeat the phenomenon with the E-PL1 but it appears to handle the situation with a faint click from the lens but no frozen display. I can live with this behaviour if I have to but I need to know if this is normal for an E-P2 and 17mm. Anyone know what I am talking about? I thank you for any help you can give me.