This adapter ring serves two purposes. First the adapter ring connects the holder system to the lens. Second, the front of the adapter ring features threads to allow for the attachment of a circular filter. This allows you to add an additional polarizer or ND filter deep inside the holder system near the lens. Lucroit adapters are milled from the highest quality aluminum in Spain.
The Lucroit 100mm holder is a fully featured, lightweight and rugged holder system. The holder is a nice alternative to the Formatt-Hitech aluminum holder system with the added bonus of french flags and barn doors for controlling reflections and lens flare. The holder features snap-on filter holder slots that are removable and available with 2 or 3 slots.
The Lucroit 100mm holder system accommodates up to three 2mm filters or two 4mm glass filters, plus a polarizer using the optional polarizer adapter ring. The holder system is attached by snapping to Lucroit’s proprietary threaded adapter rings.