K&F Concept 18-Piece Step-Up/Down Ring Set 37-82mm

18-Piece Aluminium Stepping-Ring Kit

The K&F Concept set contains eighteen aluminium adapter rings that cover thread sizes from 37 mm to 82 mm. Nine step-up rings let you mount larger filters on smaller lenses, while nine step-down rings do the reverse. Each ring is machined from aviation-grade alloy with a matte black finish for a secure, wobble-free fit.

Photographers who own multiple filter-thread lenses

Shooters carrying lenses with different front threads can swap a single filter set across the whole range without buying duplicates. Videographers using matte boxes or hoods with non-matching threads also benefit. Photographers who only ever use one filter size, or who need filter threads outside the 37–82 mm span, will not need this kit.

Thread range 37 mm to 82 mm

The kit spans every common thread from 37 mm through 82 mm in the increments listed in the specifications. If your lenses and accessories all fall inside that range, the eighteen rings cover every combination. If any lens or filter uses a thread smaller than 37 mm or larger than 82 mm, the set cannot adapt it.