Compatible with Hasselblad V-mount lenses for Nikon F-mount D/SLR cameras Built-in focusing helicoid provides back focus correction and some macro focus capabilities Includes three magnetic drop-in filters (ND4, ND8, and ND16) for light control with any lens Features a precise all-metal design with chrome-plated brass mounts for a secure and solid connection, ensuring no play, gaps, or wiggling; No adjustments are required for a reliable, accurate fit