How does the WonderPana FreeArc Essentials 0.6 Nd Soft Edge Kit revolutionize your photography experience This innovative kit is designed to provide the freedom to use and rotate 66 and 145 filters on your wide and ultra-wide angle lenses. Typically, the construction of these lenses makes it impossible to install filters due to the absence of filter threads. Moreover, standard filter sizes often fail to adequately cover the lens's wide-angle view. The WonderPana FreeArc kit changes this narrative by offering a comprehensive solution for mounting the Fotodiox collection of both round and square filters. The all-metal core attaches directly onto the lens with a secure mounting system, allowing you to mount any of Fotodiox's new 'slimline' 145mm round filters. Ideal for panorama, nature, architectural, fashion, and event photographers, as well as analog and digital filmmakers, the WonderPana FreeArc system offers unparalleled filter flexibility.