FISHEYE Focal Length?

I film with a handycam at the moment: Canon vixia HF200. I’m using an opteka fisheye ( 0.43x af). how would i know what other lens would have a hire focal length…(cover more area) that would fit my camera 4.1-61.5mm 1:.8 /37.


the lens on your camera is not removeable. the optika you are using is an adapter that modifies the focal length of the main lens, it did not replace it. the modification factor is 0.43x.