The Chrosziel 410-44 is a precision-engineered step-down adapter ring designed to bridge the gap between a 110mm matte box opening and smaller professional lenses. Specifically, it adapts the 110mm rear diameter of Chrosziel matte boxes, such as the MB415 or MB411 series, to fit lenses with a 95mm outer diameter. By creating a secure, light-tight seal, this ring prevents stray light from entering the optical path from behind the camera, which is essential for maintaining deep contrast and preventing unwanted lens flares during high-end production.

Constructed from durable, lightweight materials with a matte black finish, the 410-44 is built to withstand the frequent lens changes typical of a professional film set. Its slim profile ensures that it fits snugly into the rear of the matte box without adding unnecessary bulk or interfering with the movement of the filter stages. This adapter is a critical accessory for cinematographers who need to use a single matte box setup across a diverse lens kit, particularly when switching between larger cinema zooms and compact 95mm primes like the Zeiss CP.2 or certain ARRI Ultra Primes.