1 of 1 people found the following review helpful
4.0 out of 5 stars
Stuck thread solution, 21 Oct 2011
I had the same problem with the rear plastic cap stuck on. Whoever is putting these on in the factory is crossing the threads! Gently persuaded it into the right groove with a small flat bladed screwdriver, once it had clicked into the right groove it unscrewed easily.
Found that I cannot use the wide angle on its own as the connection is a female thread, so a 58 to 58 male to male coupler is also required to connect it to my Canon EOS.