If you have experience with adding a screw mount telephoto lens to an RX100 please describe them here. I ordered a 43mm filter holder with 52mm adapter from photo_video_design on ebay for my RX100. I plan to shoot lots of video but the RX100 does not have the focal range of most video cameras so a screw-mount telephoto might be a nice addition. It can be either 43mm or 52mm screw mount. Of course the camera will have to be handled with great care when the lens is attached.