62.5mm clamp to M77x0.75 female thread adapter (80mm outer diameter)

This adapter has two functions:

1. Allows using M77x0.75 filters on lenses with 62.5mm front outer diameter.
2. Allows coupling such lens with a matte box with 80mm opening.

Known compatible lenses are:

1. LOMO OKS5-18-1 in Konvas housing.
2. LOMO OKS1-100-1 in Konvas housing.

Made of high quality aluminium alloy. Front 80mm plastic snap-on cap is included.