hi guys, i just bought brand new em5ii and 12-40 pro(and also 40-150 pro). i already had pan 12-35 and i was planing to sell it as i changed all my gear to olympus. as i AF with the 12-40 i experience hesitations when the light is not very bright but not too dark on surfaces where contrast is a bit challenging but really not too much. When i compare to the 12-35 it performs better, seg better. Sometimes the 12-40 wouldn't focus at all. I am so disappointed. I really didn't expect that. Also, on the em5ii there is a tiny mark on the sensor. It's crazy. I bought all of it from B&H. The thing is that i am from Israel and now really don't know what to do... My family brought it to Israel for me, thats why i never had the chance to check it while being in NY. Please, what do you think i should do? I really didn't expect 12-40 to be inferior in AF than 12-35. Did anyone experience it? And this tiny mark on the sensor. Big mess... Feeling really upset and worried. Any suggestion and support from you will help. Gil.