Description Gehmann Sight Aperture Iris Gehmann Sight Aperture Iris, is a precision made sight aperture by Gehmann the renowned manufacturer of gun target sights. Aperture opens and closes like the iris on a camera, giving a larger or smaller sight picture as you want it. Has a precise click movement. Can be used with either recurve or compound as there is no lens involved. 2 rod sizes available: 8/32 for Recurves and 10/32 recommended for compounds sight use. Gehmann Sight Aperture Iris – PLEASE READ ALL BOWS have vibration , so we strongly recommend the use of mini SVL dampers that will help protect against this vibration. Also available is a sight damper that screws on to the end of the pin sight which will stop any vibration travelling down the pin. These dampers are used on the sight to offset the fact that there is extra weight on the threaded pin in contrast to other sights
