mseroka said:
if you really want to nearly eliminate the jello effect, look into getting a neutral density filter..hope this helps!
http://youtu.be/LAVfnKB2ENY
I have been using filters for quite a while but use the snake river prototyping blurfix3 adapter. Much better solution as it lets you use any filters you want. No funky reflection issues like I have seen from the polar pro and if you watch my video in the last post you can see how it performs combined with all the other methods of reducing vibrations.
Here is a video darren thecameraguy posted here earlier using the polar pro nd filter. He is using it on the GLB gimbal but that reflection is awful and id stay well away from any filter that can do that.
[youtube]http://www.youtube.com/watch?v=lLhGdyeVI-k[/youtube]
Even with a gimbal having a nd filter will give better results not only in terms of jello but helps create some motion blur to avoid the strobbing effect you get from very fast shutter speeds in video. It also helps protect the lens if you do happen to crash or even brush some tall grass in flight as I have seen that scratch a gopro lens before. But when it comes to optics id choice a quality filter over a random generic that has the weird reflection of what I have seen with some polar pro footage.