O.K. when I put a half dozen to a dozen filters together I need to put it in the case with my lens, but I often put a Polerizing Step-Up Filter, Tiffen 812, and Zeiss Softair or a U.V. Step-Up Filter, Enhancing Filter, and N.D. Filter between 2 Stack-Caps so it's at the ready. Even if most people don't buy a bunch of used filters so they can try differant FX in the field rather than their Cyber-Editing-Space you need some, as well as Stack-Caps