A ring for attaching the Hoodman HoodLoupe 3.0 to a digital camera using 1/8" or smaller elastic cord.-Print the ring flat side down with solid infill -Clean the part and remove any sharp edges -Remove the wrist strap ring from the HoodLoupe -Slide the attachment ring over the eyepiece with the elastic cord in place as seen in the picture (any stretchable cord material that fits into the recesses in the ring can work: rubber bands, bungee cord, o-ring material...) -Stretch the cords over the front of the camera to secure the HoodLoupe (Each camera will have a different placement that works best if using solid loops of cord, tied loops or cord locks)