Bought an Olympus 17mm f1.8 lens yesterday for my E-PL5 and tried using it this morning for the first time. First of this type of lens I've bought. One thing that stood out was that the mount felt very stiff compared to the 14-42 kit lens - I actually didn't have it turned all the way so the red dot was on top, and had a black screen. Reluctantly (due to the already very tight mount) turned it a bit farther and it works, but doesn't have the smooth "click" that you get with the 14-42 when it locks in. Expensive lens, so just wondering if that stiffness is normal, metal effect vs plastic maybe? Or if I'm just being paranoid . Thanks.