I've posted my review and field test of the Canpon 11-24MM L super wide zoom.
A brief summary:
Expensive at $2,995.00, to be expected given the 11MM wide view and rectilinear construction.
Heavy, over 2.5 lbs. and somewhat ungainly until mounted on the camera.
Large rubber focus and zoom rings have the right amount of drag
Snow globe front end means no standard filters.
Wonderfully sharp and mostly barrel distortion free.
As you can see from the attached photo shot at 11MM, the lens resolution and lack of barrel distortion is amazing.
If you are interested in the lens I invite you to read the review on my blog at
www.foto-gizmo.blogspot.com