What is the OD of the prime and the wide angle lens. cavision used to have some fairly small adapter rings for their Wide angle lens shades.

Don't expect the B&W hood, metal or otherwise, to work without vignetting at full wide (even though it's billed as made for WA lenses). I have the metal (with the gs100k and the Raynox) and you definitely get vignetting. The Raynox with the Hoya superthin is okay, but only without the hood. There are some superthin polarizers out that work with the Raynox and will help in bright sunlight. If anyone finds a hood that works, please post it here. I have looked high and low, but maybe not hard enough. (BTW, having purchased the metal hood, I do use it if transporting my cam with the WA attached for protecting the lens from hard knocks, but I usually remove it while shooting.)