Hi all, Thanks for being so helpful! I already received some great advice! I am currently using my trusty Canon 70D with Sigma 18-35mm f/1.8, which I absolutely love! I wanted to ask about how you can use the Sigma lens on the GH4? I need advice about some sort of a converter/adapter. I am aware of the fact that I will probably loose control over the aperture, but that is really not a problem for me, mainly because a shoot whide open, and I will need to change it, I can always change it on the Canon. Any advice would be highly appreciated! Thanks in advance!