What do you think is the longest lens you can use with a video monopod? I am thinking of getting a mogopod, custom setup, Benro or Manfrotto. I have a standard footless monopod and I get some pretty unstable shots with a 135mm m42 lens. I am doing event videos with this setup, mostly wedding stuff, so being able to get some length would be really nice.

First time post, sorry if I screw something up.

Here's the sort of thing I would like to do: http://www.406films.com/wedding-and-event/