Panasonic GH4 for shooting video is gonna be my new my camera very soon. I'm wondering what I should do about the lenses...
Should I buy a new one like Olympus 12-40mm 2.8 or buy a Metabones and use my Sigma 17-50 2.8?
I've been watching at some videos in youtube/vimeo and I really have the feeling that Sigma is not sharp enough... am I right? Any opinions about that?