Albert.AThe GH4 is a Panasonic camera and, while I'm less familiar with them, if it supports the M4/3 format chances are it will fit. As mentioned before Panasonic and Olympus developed the M4/3 format together . The one difference is the "IS" (Image Stabilization) function is in the camera body on Olympus models and in the lens on the Panasonics. The advantage is if you own an Olympus you may use any of the Panasonic Lenses and not worry about IS due to its being in body. Visa versa, using Olympus M4/3 lenses on a Panasonic camera requires a little adjustment, and I'm not sure how IS is accomplished if at all?
AudioproLike all Olympus m43 lenses (with the exception of the new 300mm), this lens does not have stabilization. If you use it on an Olympus m43 body (as I do) there won't be a problem, but most Panasonic m43 bodies lack image stabilization, so you won't have any unless it's one of the Panasonic GX m43 bodies, some of which do have in-body stabilization. I don't have a Panasonic body, so perhaps someone who does can say which Panasonic bodies have stabilization and which don't.
ScoobaIf you read my previous posts you'd know that I already knew this, so I'm not sure what you're replying to? But I didn't know that Panasonic made any models with in-body stabilization, so thanks for that.