Note that the King Cobra mounts on the side of the lens. I don't know how big an issue that is with the lens you bought but it might be huge. This is an excerpt from an article I found on Luminous Landscape:
<Begin quote> The Wimberley has, to my knowledge, only one significant competitor, the Kirk King Cobra. I have no experience with this mount, so I can't comment on it other than to note that unlike the Wimberley it suspends the lens from the side, rather than the Wimberley design which allows the lens to sit on a platform. This made it unsuitable for my purposes, because the Pentax 600 doesn't have a rotating tripod collar. Any lens without such a rotating mount will similarly not work with the Kirk. At $440 the Kirk is somewhat less expensive than the Wimberley. This price includes the quick release. <end quote> you can find the complete article here: http://www.luminous-landscape.com/reviews/accessories/wimberley.shtml I hope this helps. TR > The King Cobra is made by Kirk Enterprises: > > http://www.kirkphoto.com/cobra.html > > TR > > > > Question for Club600: > > > > I can't find King Cobra at either B&H or Adorama. At B&H this is the > > least expensive Wimberly I find: > > > > http://tinyurl.com/bbksb > > > > Will this do the job? The other two models that B&H lists seem only to > > have quick release, which this model lacks. Is there any reason to want > > quick release on a lens like this? > > > > Thanks, > > > > Joe > > >