Leica SOOGZ I used this as a hood attachment for the elmar 35mm. This is an adapter for attaching a 39mm inner diameter (E39) filter to lenses with a 36mm outer diameter (A36), such as the Elmar 50mm f3.5, Hektor 50mm f2.5, Summar 50mm f2, Summaron 35mm f3.5, and Elmar 35mm f3.5. The condition is very clean, as you can see in the images.