Trying out Sigma 105 2.8 EX Macro on the GH2.
Was getting audio pops in FCP but solved the problem by converting mp3 music track to an AIFF file in iTunes, and then replacing the mp3 audio with the AIFF file in FCP timeline. No more annoying pops.
Edit: Final Cut Pro 7
Camera: Panasonic GH2
Lenses: Sigma 105 2.8 EX Macro & Panasonic 25 1.4
Music: Samba Em Preludio by Esperanza Spalding, Buy it on iTunes