Just looks like a tight fit. I would put on a pair of rubber gloved as was previously suggested, put on the Gimbal Clamp and hold on to the Camera as best you can and just work it free. The Gimbal is not as delicate as it looks. Be careful. Don't hurry or force it. Your choice of filters got mostly good reviews on Amazon. All the bad reviews I read were for bad fit. Either too loose or unable to install with a foam ring, or too tight and hard to remove with a metal ring as yours have. I would not have bought them with a foam retaining ring, that would wear out and the metal ring looks like it would scratch the camera. You should always read the reviews on Amazon. You must have just purchased your set, so you can probably return them. I would spend a little more and order a set from Polar Pro or PGYTECH