A housing for a magnification loupe is provided having a body portion for an eyepiece lens and a nose portion for an objective lens. The body portion for the eyepiece lens includes outer circumferential threads over which the objective nose portion fits. The objective nose portion includes a pin slot...http://www.google.com/patents/US20040125444?utm_source=gb-gplus-sharePatent US20040125444 - Magnification viewer
