By owning a few Canon lenses, we decided to get a hold of the Speed Booster EF-M43 since we have a couple of GH4s in the studio! The speed booster, also known as a speed adapter, is powered by the camera to help adapt third party lenses to the Gh4. Even though we are highly satisfied with the lenses we have for our GH4s, we never know when we could use more of a variety.
