I've been using my new 25mm 1.4 with my E-M5 for about 2 weeks. At 1st, no rattle snake, but then it started after a few days using it, seems rattle more outside. But that's fine, i don't mind the noise. My main problem I have noticed so far is that it: 1. Doesn't wake up. I have to turn it off then back on. 2. When (1) happens, the 1st picture is pitch back, then it's fine after that. This is so weird. Sometimes, i turn it off (instead waiting for it to sleep), then back on, and still miss the 1st picture. Do you have this problem?