Gehmann #501 23mm Lens holder for Gehmann iris w/removable thread

Gehmann#501 Lens holder for Gehmann irises with removable thread only as seen in picture 3

23mm lens holder allows a prescription lens to be fitted eye-side of your rearsight manufactured exclusively for our own latest irises with a detachable front thread and not carrying our 1.5x magnified diopter
The detachable steel front thread of your iris is removed with the factory spanner
501's adaptor thread is then screwed into the front of your Gehmann iris
501, now with your iris mounted, is screwed into your rearsight after loosening the rail carrier's allen screw
Mount your prescription lens in the lens holder which may be slid off the rail for easier assembly
Reposition the lens holder on the rail as required and lock it in place
Positioning of the assembly on your rearsight is easily set as the attachment boss has radial adjustment and is simply secured with the allen screw located in the front body