This is a holder for the go pro camera 1/2 to mount it on an multicopter. it's ajustable by a servo as you can see in the video.
the difference between this one and the other is the position of the anglescrew. i prefer this version of the holder, but choose the one which is better for you! =)

here is a video about this thing..

youtube.com/watch?v=v_3FufRltZY&feature=plcp

there are 2 versions of this thing you can find the other one on my profile.

Please visit our homepage www.3dprinterkit.ch

have fun