Like Sue I have never owned a Casio but I do own a coolpix 995 and I also purchased the EagleEye Optic Zoom (Expensive compared to some other teleconverters but the image quality and light gathering ability is tremendous, and as such i think it is good value. I hope that makes sense). The EagleEye works extremely well with the CP995. The CP995 has a four times Optical zoom and I do not get any vignetting as long as I use optic zoom on the camera at 2 times or greater. But make sure you check out the compatability of the EagleEye with your Casio before buying it if your thinking along those lines, as some cameras do not work well with the EagleEye Optic Zoom. The image with this message was taken hand held with the CP995 EagleEye Optic Zoom Combo in low light conditions. The effective focal length was approximately 750mm.