• Front side - M77x0.75 female thread
• Rear side - M82x0.75 male thread
• Machined of high quality aluminium alloy
• Flangeless design

This adapter allows using standard 77mm screw-in filters on lenses with 82mm filter thread. No flange, so no distance added. This reduces risk of vignetting (but does not prevent it in some cases since 77mm filter itsef is smaller than originally intended size for such lenses).