Canon Tripod Mount Ring B(B) Tripod mount for Canon macro lenses with EF mount Enables stable macro photography Allows quick and easy rotation without shifting the optical axis when changing between vertical and horizontal compositions Original retail price: 15,840 yen (tax included) Compatible lenses: ・EF100mm F2.8 Macro USM (with adapter) ・EF180mm F3.5L Macro USM (adapter not required) ・MP-E65mm F2.8 1-5x Macro Photo (adapter not required) Appearance: Very clean appearance with minor scratches Functionality: When attached to the EF100mm F2.8 Macro USM, it functions without any issues in terms of attachment, stability, and rotation. Thank you for viewing.