Hello friends, I have both the E-M5 & E-M1. With the E-M5 I use IS-1, and for the E-M1 I use IS-1 as well - although I still am not clear on the difference between IS-1 (all direction) & IS-4 (auto) on the E-M1. If someone can explain why and when to use either IS-1 and IS-4 on the E-M1, please do. In addition, I've read from several sources that it is not advisable to use the IS when the camera is not moving - for example when it's on a tripod. I've also read that IS shouldn't be used when the shutter is above a certain speed, in correlation with the focal length of the lens being used (I've seen some formula for this relation of shutter speed to lens focal length indication that the IS should be turned off). Anyways, why should the IS not be used when it's not needed? What's the harm? Thanks!