These step-up adapter rings are the critical connection between any lens and the V5/V6/V7 Pro 82mm primary adapter ring. 

Please note that any V5/V6/V7 Pro kits already includes 77mm, 72mm and 67mm step rings.

These step rings are specifically for NiSi’s V5/V6/V7 system holders and can not be used as general step rings as the thread has no stop / end and will keep turning. For general purpose step rings, please see NiSi’s Brass Step Rings which allows the use of threaded filters on lenses with smaller filter threads.